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Thanks to natural advantages and effective management, Norwegian hydropower is among the cleanest in the world. Published 15 March 2023 Hydropower is the only form of renewable energy production that can be adjusted based on demand. With its combination of stability, flexibility and low production costs, it can make a ...
Ferromagnetism is a property of many materials like iron. They are magnets, so they are attracted to, or pulled towards other magnets. In physics, there are many different types of magnetism. Ferromagnetism is the strongest one. It is used every day in many technological objects, like television screens, credit cards a...
The concept of personality refers to the profile of stable beliefs, moods, and behaviors that differentiate among children and adults who live in a particular society. The profiles that differentiate children across cultures of different historical times will not be the same because the most adaptive profiles vary with...
Astronomers may have underestimated the extent to which interstellar dust obstructs our view of other galaxies. New research suggests that dust blocks half of all the starlight in the universe from reaching Earth, meaning there is a lot more light and radiation out there than previously accounted for. By looking at gal...
Tool unearthed at excavation site. Credit: MPK-WTAP This is an updated version of our post from April 2015. Archaeologists say they’ve unearthed the world’s oldest stone tools made by human ancestors at a dig site in Kenya. The set of 149 stone flakes, hammers and anvils, found off the shores of Lake Turkana, appears t...
Upon the death of a loved one, both men and women during the Victorian era were expected to follow stringent rules on how society expected them to act, dress and conduct themselves during a rather extensive period of mourning. From lavish funerals and horse-drawn carriages to elaborate graveside monuments, it seems the...
Oct. 28, 2011 New information has been published about the Lutetia asteroid that was observed in 2010 and its properties. The analysis of the data collected during the spacecraft fly-by indicates that Lutetia is a dense, intact relic dating back to the birth of our solar system. The Rosetta spacecraft, owned and operat...
Early childhood development in all aspects plays a critical role in a child’s life. A child’s brain is most adaptable and is able to adjust early in life to accommodate a magnitude of different environments, interactions, and situations. As the maturing of the brain becomes more restricted, it becomes less capable of a...
NASA Spitzer Space Telescope has identified the fastest-spinning brown dwarf known. Brown dwarfs are generally more massive than planets but not massive enough to become stars. These cosmic in-betweeners are plentiful throughout the galaxy, but many mysteries about them remain. To measure the rotation rate of the brown...
\|Excellence in mathematics education requires equity—high expectations and strong support for all students, regardless of their personal characteristics, backgrounds, or physical challenges, must have opportunities to study--and support to learn--mathematics. This does not mean that every student should be treated the ...
\|Reading Counts Achievement Program\| Click here to access the Scholastic Reading Counts website. Once on the website, click on "Titles" under Browse Quizzes. You will have the option to search by grade level, reading level, genre, and more. All students need to develop strong reading skills that they will use every day...
How Coal Forms According to scientists who believe in evolution, coal formed millions of years ago. Supposedly, in swamps and bogs, plants and other living things began to die and fall to the bottom of the swamp. Over many years, these organisms were buried by other dead plants and animals, and formed a substance known...
Back to Paul Revere! Extension Activities - Grades: 3–5 About this book Spread the Word Ask students to become modern-day Paul Reveres. How would they quickly spread an urgent message throughout the entire community? What form of media and/or transportation would they use? Discuss the advantages and disadvantages of th...
by Michele Roberts Casey, MD Falls Pointe Medical Group We really do not think about our respiratory system until a cough or sneeze provides a little reminder. The respiratory system’s main function is to ensure that our bodies absorb life-giving oxygen and gets rid of the non-essential waste known as carbon dioxide. T...
Fossil find closes gap in dino extinction Alive and kicking A piece of dinosaur horn could help settle the debate over whether non-avian dinosaurs existed at the time of an asteroid impact 65 million years ago. The 45-centimetre Ceratopsian brow horn, possibly from a triceratops, was found in the Hell Creek formation i...
The history of shoelaces goes hand in hand with the historical record of shoes. Shoelaces were required to secure the shoe to the foot. Archaeological records provide examples of ways shoes were fastened to the foot. Simple pieces of leather were bound to the foot and ankle with laces and were used in 2000 B.C. during ...
How the Ball Clay Deposits Occurred A rare coincidence of geological conditions was required to form and preserve the ball clay deposits: 1) suitable kaolinite-rich source rocks largely free of iron oxides; 2) erosion of these rocks into fresh or brackish water ‘traps’ for the ultra fine particles before they could be ...
Flowers and Their Animal Pollinators Animals play an important part in pollinating flowers. During the growing season, from early spring to late summer, animals visit flowers to gather the nectar and pollen they use as food. As they move about collecting their food, they transfer pollen from one flower to another. Two ...
A black hole a billion times as massive as the Sun lurks in the heart of the young galaxy. It's half as wide as our solar system -- a dark pit into which matter and energy can fall but never climb out. Yet this ultimate darkness is encircled by the ultimate brightness -- a spinning disk of hot gas that's just a few tim...
G.C.S.E chemical reaction - rates of reaction between sodium thiosulphate solution and hydrochloric acid. The rate of a reaction is the speed at which a reaction happens. If a reaction has a low rate, that means the molecules combine at a slower speed than a reaction with a high rate. Some reactions take hundreds, mayb...
The entire report, Large Predators Limit Herbivore Densities in Northern Forest Ecosystems, is available here. ScienceDaily (Apr. 9, 2012) — A survey on the loss in the Northern Hemisphere of large predators, particularly wolves, concludes that current populations of moose, deer, and other large herbivores far exceed t...
There were two types of hospitals during the Civil War. Field hospitals accompanied the armies, treating the sick and wounded first before sending those needing lengthier care to the general hospitals behind the lines, often at some distance from the front. Each general hospital had a staff, preferably of a size approp...
Rising levels of carbon dioxide drove much of the global warming that thawed Earth at the end of the last ice age. That's the conclusion a team of scientists has drawn in a new study examining the factors that closed the door on the last ice age, which ended about 20,000 years ago. The result stands in contrast to prev...
Mars no longer has a significant global magnetic field. But we now know that it had one early in its history. Observations by NASA's Mars Global Surveyor (MGS) spacecraft have revealed the tell-tale signs in the ancient crust of the southern hemisphere: stripes of magnetised crust of alternating polarity running roughl...
Corn, also known as maize (the terms are interchangeable), is one of the most important crops in the world, and is the largest crop of the Americas. Almost 700 million metric tons of this nutritious and valuable plant are harvested annually worldwide – and yet most of us know only that it was shown to the Pilgrims by t...
The Polymerase Chain Reaction (PCR) provides an extremely sensitive means of amplifying small quantities of DNA. The development of this technique resulted in an explosion of new techniques in molecular biology (and a Nobel Prize for Kary Mullins in 1993) as more and more applications of the method were published. The ...
To tell the story about the first people who lived in what we now call Wisconsin, we first need to look outside Wisconsin to understand what was happening in other parts of the world. About 12,000 to 20,000 years ago, the earth was nearing the end of a glacial era. A large quantity of the earth's water was locked up in...
Note: The designs on this page are intended to be a general representation of Pueblo designs, and are not intended to represent original Hopi art. The Hopi are a tribe of about ten thousand people located in a fairly isolated geographic area in northeast Arizona. Descendants of the ancient Hisatsinom, their culture can...
Herennius was born in Pannonia, during one of his father's military postings. His mother was Herennia Cupressenia Etruscilla, a Roman lady of an important senatorial family. Herennius was very close to his father and accompanied him in 248, as a military tribune, when Decius was appointed by Philip the Arab to deal wit...
Why do we Sleep? Ask someone why they sleep and they are likely to reply: "Because I'm tired of course…" Ask them why they are tired and they may reply: "I haven't had enough sleep…"This shows the importance of the relationship between sleep and being awake. So why do we sleep? Could we do without sleep allowing us to ...
Three children are going to buy some plants for their birthdays. They will plant them within circular paths. How could they do this? Choose 13 spots on the grid. Can you work out the scoring system? What is the maximum possible score? Can you use the information to find out which cards I have used? Play the divisibilit...
(How a Law Becomes a Law) Anyone may draft a bill, but only members of Congress can introduce legislation, becoming the sponsor(s) when this happens. There are four basic types of legislation: - "Public bills" deal with general questions and become public laws if approved by Congress and signed by the president. - "Pri...
Nacreous Clouds Above Antarctica December 10, 2003 The above photo shows metallic nacreous clouds above McMurdo Station in Antarctica. Nacreous means pearlescene or pearl-like. These stunning clouds are observed in the Antarctic each Austral spring and fall when upper air temperatures drop low enough for their formatio...
The Cretaceous-Tertiary mass extinction event is perhaps the most famous in the mind of the public. It wiped out the dinosaurs. The evidence points to a giant asteroid, with the famous impact crator found at Chicxulub (pronounced Cheek-sue-loob). Part of the impact crater lies on the Yucatan peninsula Mexico, and part ...
Researchers Closer to Getting Fuel Cells to Run on Gasoline New fuel cell goes from liquid fuel to electricity without a separate hydrogen generator 4 April 2005— Fuel cells, the clean-burning engines of the envisioned hydrogen economy, offer the promise of less pollution and lower fuel consumption. Until there are hyd...
It is widely believed that children learn by playing, but if you observe children’s play activities, you may notice that the process of ‘playing’ is inherently unsystematic. This contradiction has made the question of how children learn during play of particular interest to parents, teachers and researchers. To find ou...
The early evolution of the Solar System clearly presents a gap in our understanding. There have been a huge number of simulations done about how the evolution might have gone, and a recent study, investigating into the dynamic instabilities of the early orbits, has reached a stunning conclusion. The startling finale is...
\|\|This article is in a list format that may be better presented using prose. (April 2011)\| The term Navajo Wars covers at least three distinct periods of conflict in the American West: the Navajo against the Spanish (late 1500s through early 1820s); the Navajo against the Mexican government (1821 through 1848); and the...
Details of Change by Susan Titus Deerfield changed markedly because of national influences: the economy, immigration, migration to the West, the Civil War, and industrialization. - Demographic changes • Civil War casualties and increasing westward migration significantly reduced the number of working-age men • After th...
Credit: Barron Crawford, USFWS Songbirds are among the smallest sized birds that use Tennessee NWR. They are often referred to as “perching birds” because they hold tightly to branches with their toes. For management purposes, songbirds are part of a group called “land birds” because they rely mainly on terrestrial hab...
This Month in Physics History March 1, 1896: Henri Becquerel Discovers Radioactivity Henri Becquerel was well positioned to make the exciting discovery, which came just a few months after the discovery of x-rays. Becquerel was born in Paris in1852 into a line of distinguished physicists. Following in his father’s and g...
• • • • • • How is sound used to help make long-term measurements of the ocean? For the past century, most ocean measurements have been made from research vessels. Small groups of scientists and technicians made measurements during research expeditions lasting for a month or so, and then returned home to analyze the da...
How SuperCroc and its Ancient Cousins Survived a Mass Extinction New Discoveries Lead to Insights on Species Evolution by Max Lien, age 13 Ten years ago, Paul Sereno of the University of Chicago led a team of paleontologists into the Sahara Desert. During the expedition, these scientists found the remains of the larges...
During the 1600s, thousands of Europeans came to live in the New World, but the majority of these colonists where from England. These people lived in thirteen colonies along the Eastern coast of the American continent. The colonists were required to pay taxes to the King of England, and the taxes got higher and higher....
Pathet Lao Uprising in Laos The name "Pathet Lao" (Land of Laos) referred to the communist movement that occurred in Laos beginning in the 1950s and was the Laotian equivalent of Cambodia's Khmer Rouge and Vietnam's Viet Cong. The movement was formed by Prince Souphanouvong in North Vietnam during the first Indochina W...
Flu: Talking to Your Children Talking to Children About the Flu (Novel H1N1): A Parent Resource Concerns over Novel H1N1 flu and seasonal flu can make children and parents anxious. We know that both strains spread easily; what we don't know is how virulent is may be become. Acknowledging some level of concern, without ...
Chemistry: An Illustrated Guide to Science is one of eight volumes in the Science Visual Resources set. Containing eight sections, a comprehensive glossary, a Web site guide, and an index, Chemistry is an ideal learning tool for students and teachers of science. Full-color diagrams, graphs, charts, and maps on every pa...
Predators and Prey Learn about the differences between predators and prey, how they are vital to the food web and a healthy ecosystem. This tour also includes a game that looks at what animals have been introduced into Arizona and how those animals are affecting the food web and the niches of the animals native to the ...
What is Black Carbon? Black carbon (BC) is the most strongly light-absorbing component of particulate matter (PM), and is formed by the incomplete combustion of fossil fuels, biofuels, and biomass.BC is emitted directly into the atmosphere in the form of fine particles (PM2.5). BC is the most effective form of PM, by m...
Plotting Individual Points In the game of Battleship, your goal is to figure out where your opponent’s fleet of ships is located, then sink each ship by firing at its coordinates on a map. If you have ever played this game, there are letter coordinates and number coordinates. The coordinate B-6 means to go over to “B” ...
The Roberval Balance. Though many students have never heard the name "Roberval balance", most have used one. The standard laboratory double-pan balance has a Roberval construction that keeps the pans level as they move up and down. More importantly, it prevents the pans from tilting as they move up and down, and this i...
Celebrate Black History Month in your classroom by highlighting the African American artists, educators, icons, and influential leaders that have impacted our nation's history and culture. Use PBS LearningMedia to enhance your lessons with interviews, historic images and videos - and remember to register online for ful...
Study: Early Humans Were Slowpokes Credit: University of Arizona CREDIT: University of Arizona Early humans may have strutted their stuff as upright walkers and runners, but a new study suggests they were real slowpokes. If early humans lacked an Achilles tendon like gorillas, as the study's "reverse-engineered" comput...
Machine code is the actual form of the information that a computer's central-processing-unit? understands. If you look at an executable file in a text or hex editor, you will see machine codes -- but you probably won't understand them. They are not very readable to humans, but it can be done with a lot of intimate unde...
The Thirty Year’s War represents another attempt at the compulsion of belief, this time in the lands that make up modern-day Germany. The war was far too long and far too involved even to list its major events [here]. However, it was crucial for several reasons. First, it was another step in the marriage of religion an...
The language we call Pidgin here in Hawai‘i is actually a creole language which developed on plantations. There are many creole languages spoken around the world, including Jamaican Creole, Louisiana Creole, Papiamento (Aruba, Bonaire and Curaçao), Tok Pisin (Papua New Guinea), and Haitian Creole. In the nineteenth cen...
A majority of Northerners supported the Union war effort, yet a sizable and vocal minority opposed the conflict. Most of the opponents, the Copperheads, preferred a peaceful resolution to the war, with some of these people even calling on the North simply to leave the seceded Confederate states alone. During the Americ...
This lesson is designed to integrate what the students have learned concerning the Articles of Confederation, The Constitutional Convention, The three branches of government and the approval of the Bill of Rights. Specifically, this lesson focuses on the standards by examining how the Constitution became the foundation...
The manner in which waterfowl molt their flight feathers, or primaries, is unique among birds. Most birds undergo a "sequential molt," in which their flight feathers are lost one at a time from the innermost primary feather to the tip of the wing. This allows many birds to retain their flight capabilities while molting...
ReadWriteThink couldn't publish all of this great content without literacy experts to write and review for us. If you've got lessons plans, activities, or other ideas you'd like to contribute, we'd love to hear from you. Find the latest in professional publications, learn new techniques and strategies, and find out how...
Asteroid impacts are rare, but they can cause incredible harm (look what one did to the dinosaurs!). In 1908, one of them flattened 800 square miles in the Russian countryside. What would have happened if it had hit a major Western city instead? We can use robots to mine them, but we don't want them to impact us, so in...
Most people think that corals are found in warm water and that mountains are only on land. In 2002, scientists from the Monterey Bay National Marine Sanctuary and collaborating institutions were able to use new technologies to explore the cold waters, 4,101 to 11,581 feet deep (1250 to 3530 meters), off the Central Cal...
Physicists have, throughout history, spent many years of their lives painstakingly searching through the world to find something to name after themselves. There are few areas where this is more true than the study of temperature. In the beginning, the first mass producer of thermometers, Fahrenheit was the first sensib...
The 1970s brought major changes for Waitangi Day. The day finally became a public holiday. Increasingly, it also became the focus of growing Māori protest about the status of the Treaty of Waitangi and issues of race. Māori politics took on a more radical edge in the 1970s. Some Māori thought of taking an appeal to the...
I'm Unique: Teaching Your Toddler to Value Differences Seeking Out Difference Start by trying to expose your child to a variety of influences in your community. Get to know people of different races, religions, and cultural backgrounds. Then let your toddler get to know their children. After all, you can't expect your ...
Science Fair Project Encyclopedia A conchoidal fracture is produced when some types of fine-grained mineral, such as obsidian and flint, are broken. These minerals were widely used in the stone age to make sharp tools. They occur also in amorphous solids such as glass. Conchoidal fractures often result in a broken, cur...
Room 8: The Later Stuarts © The National Portrait Gallery, London James II and William and Mary As Charles II grew older it became apparent that he would have no legitimate children. Anxiety about the Roman Catholicism of his brother and heir, James, Duke of York, led to a number of attempts to exclude him from the suc...
What is counterpoint? It’s defined by Merriam Webster as: one or more independent melodies added above or below a given melody The rules of counterpoint have been developed to instruct a composer on how to create a counter melody that can be independent yet still blend harmonically with the main melody. The video below...
Digital storytelling is a project based style of learning that will impact our students in many ways. It allows them to process, research and gather a variety of multi-media forms of information. It builds on student collaboration and allows them to synthesize their knowledge as they work together retell events in hist...
To witness the incredible power of steam, you don't have to look any further than the eruption of geysers or the explosion of gasses that occurs when lava reaches the ocean. Early man witnessed such sights and has long sought to control the raw power of steam through technology ranging from the basic tea kettle to the ...
From the wild-colored berries in your local produce section to the breathtaking reds and violets of autumn, anthocyanin is the pigment most often responsible for giving plants colors in the spectrum between red and blue. This pigment is notable for both the way it takes part in leaf metabolism as winter approaches, and...
Biologists at the University of California San Diego have identified a protein that controls how plants respond to carbon dioxide in the atmosphere, a fundamental discovery that could someday lead to profound changes in how domesticated plants function. Future crops and commercial tree species might be engineered to ab...
The Trophic Cascade By - Annie White - 2006 Since the reintroduction of wolves to Yellowstone National Park in 1995, we have learned much about the effect large carnivores have on an ecosystem.; In the past it was thought that an ecosystem was built from the bottom up... with plant life as the basis from which everythi...
A flood forms when it has been raining for a long period of time, a dam or levee breaks, or when there is more water that can be held in a stream or river and the water breaks over into the surrounding regions called flood plains. Floods occur when the volume of water contained by the shores of a body of water or the b...
A large set of tracks made by archosauromorphs in the Pyrenees mountain range may include a new type of footprint made by reptiles that lived 247 million years ago, according to a study published April 19, 2017 in the open-access journal PLOS ONE by Eudald Mujal from Universitat Autònoma de Barcelona, Spain, and collea...
Teach Math and Science to Preschoolers What is the right age to start learning about math and science? You may be surprised to learn that your preschooler is ready to be introduced to more than rote counting and discussing the weather. Recent research by the National Research Council (NRC) and National Institute for Ea...
Perception is the process by which organisms interpret and organize sensation to produce a meaningful experience of the world. Sensation usually refers to the immediate, relatively unprocessed result of stimulation of sensory receptors in the eyes, ears, nose, tongue, or skin. Perception, on the other hand, better desc...
2We are learning to write recounts A recount is an account of a personal experienceExamples: Letters, autobiographies, biographies, diaries, newspaper reports, eyewitness reportRecounts tell what happensThree typesPersonal / literaryImaginaryFactual 3Today we are learning to write a … Factual Recount 4We’ll know we can...
What better way is there to teach a student about sounds in words. Through explicit direction, students will be chunking their way through this activity in no time. There are 3 levels of difficulty for this activity. 1. Students match the card up to the corresponding sound to make logical words. 2. Instead of a whole c...
Sediment samples, collected 700m below the floor of the Bering Sea, helps to predict the impacts of climate change. The research vessel JOIDES Resolution on an earlier expedition. A team of researchers, led by Professor Christiana Ravelo of the University of California, embarked on a nine-week expedition last summer to...
Avian Influenza is an infection caused by avian influenza (bird flu) viruses. The influenza viruses occur naturally among birds. Wild birds worldwide carry the viruses in their intestines, but usually do not get sick from them. However, avian influenza is very contagious among birds and can make some domesticated bird,...
The early Umayyad period was one of strength and expansion. The army, mainly Arab and largely Syrian, extended the frontiers of Islam. It carried the war against Byzantium into Asia Minor and besieged Constantinople; eastward it penetrated into Khorasan, Turkistan, and northwestern India; and, spreading along the north...
The researchers have created components that could one day be used to develop quantum computers – devices based on molecular scale technology instead of silicon chips and which would be much faster than conventional computers. The study, by scientists at the Universities of Manchester and Edinburgh and published in the...
Euphrates jerboas are found in the mountains, semi-deserts, and desert steppes of Asia Minor, from Turkey and northwestern Iran, east to eastern Afghanistan, south to northern Saudi Arabia and Kuwait and west to Jordan and Syria. Where the territory of Euphrates jerboas overlaps that of lesser jerboas (Pygeretmus pumil...
"...till like a clock worn out with eating time." John Dryden (1631-1701) The 1955 Cesium Atomic Clock at the National Physical Laboratory, UK. It kept time to a second in 300 years. A "cesium(-beam) atomic clock" (or "cesium-beam frequency standard") is a device that uses as a reference the exact frequency of the micr...
Ten Times More Lesson 1 of 14 Objective: SWBAT explore patterns in the base ten system and build numbers using base ten blocks to find ten times a number. I begin this warm up by directing students to play one round of "I have Who Has- Place Value". I Have Who Has Place Value 2 Thousands I only allow five minutes for t...
Prisons – or gaols – in Medieval England operated very differently than they do today: in fact today’s prisons – even the toughest ones – would seem like a holiday camp in comparison. The primary function of a gaol in the 14th century was to hold a prisoner until they could be either brought to justice or else pay a fi...
Articles, Books, Documents, Periodicals, Audio-Visual Search the Library Search the Directory Your support makes our work possible. Please Donate Today The Spithead and Nore mutinies were two major mutinies by sailors of the Royal Navy in 1797. There was also discontent and minor incidents on ships in other locations i...
Crude oil or petroleum is an important fossil fuel. Fossil fuels were formed millions of years ago, when much of Earth was covered by water containing billions of tiny plants and animals. After these organisms died they accumulated on ocean floors, where, over the ages, sand and mud also drifted down to cover them. As ...
In a large and growing number of schools around the country, students are learning more than just reading, writing, and arithmetic. They are learning what character education advocates call the fourth and fifth R’s: respect and responsibility. The formal teaching of morals and values is not a new phenomenon; rather, it...
The largest Greek island, Crete, was the birthplace of the first European civilization. No one knows where the ancient inhabitants of the island came from, nor even how they called themselves. Today, history recognizes them as Minoans, their name coming from the legendary island ruler from Greek mythology - Minos. The ...
Studying the human genome is a huge task. It took the human genome project 13 years and international collaboration to sequence the human DNA. With the completion of the Human Genome Project, we now have acquired the complete list of building blocks necessary to put together a functional human being. But learning how t...
Update, Wednesday 11/12: At around 10:30 am ET on Wednesday morning, scientists made history by landing a spacecraft on a comet for the first time ever. The 220-pound lander Philae was carried to the comet, dubbed 67P/C-G, by a larger probe named Rosetta, launched and operated by the European Space Agency (ESA). Accord...
Roughly 90% of humans are right-handed and this is one of the traits that separates us from most other primates who don’t really show any overall preference for left or right handedness. It’s believed that handedness played an important role in human evolution, with a recent study on the earliest evidence of right-hand...
Recitative (Italian: “recitativo”) is music which is telling a story quite quickly, as if it were being spoken, "talky". The word means: “to recite” i.e. to tell a story. Recitative is used in opera, oratorio and cantatas. When opera was invented around 1600 the composers needed to tell the story in music. In recitativ...
The force that one surface exerts on another when the two rub against each other is called friction. strength of friction depends on two factors: –1. the type of surfaces involved– 2. how hard the surfaces push together. The Usefulness of Friction friction, we would not be able to walk! •We would only slip when we try ...
On November 22, 1935, the first "China Clipper" a Martin-130 seaplane aircraft left Alameda Island near San Francisco for a voyage across of 8,000 miles to Manila that took six days, with stops in Hawaii,Midway Island, Wake Island and Guam. Pan-American airlines, under its executive Juan Trippe, named the planes "China...
There are many ways to help children learn math facts. Flash cards can be effective if you use them at the right time. Before encouraging your child to answer math facts quickly, it is important to help your child build a conceptual understanding of math facts so that she can transfer her knowledge across contexts. Onc...
Sleep timing is controlled by the circadian clock, sleep-wake homeostasis, and in humans, willed behavior. The circadian clock is an inner timekeeping, temperature-fluctuating, enzyme-controlling mechanism that works in tandem with adenosine, a neurotransmitter that inhibits many of the bodily processes associated with...
A procedure, used prior to competition or hard training, by which an athlete attains the optimal body core temperature and specific muscle temperature for performance, and prepares physically and mentally for the activity. A rise in temperature may be gained passively by taking a warm bath, but it more commonly involve...

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