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A new study of Stone Age human teeth proves that even our ancestors defied dentists’ orders. Archaeologists studying 13,700-year-old teeth recovered from Morocco’s Grotte des Pigeons found some of the earliest evidence for common tooth decay, suggesting that dental caries were widespread much earlier than scientists pr...
Imagine a world where farmers could avoid crop-killing droughts or frost and where florists could grow an abundance of flowers all year long. Scientists are within reach of this possibility because of genetic plant studies conducted by a UNT researcher and his colleague. Brian Ayre, UNT professor of biology, and Robert...
Imagine you are suspending a cube from one vertex (corner) and allowing it to hang freely. Now imagine you are lowering it into water until it is exactly half submerged. What shape does the surface of the water make around the cube? What happens to the perimeter of triangle ABC as the two smaller circles change size an...
Learning Through Robotics How can building robots help elementary, middle and even high school students learn about math, physics, reading, writing and engineering? And what kind of robots are we talking about here? R2D2, C3PO from Star Wars or that stunning robot babe from the silent film Metropolis? No, at least not ...
In our study of rotational dynamics we skipped over exactly how to calculate the rotational inertia of a solid body. The process for calculating this quantity is quite complicated, and requires quite a bit of calculus. Thus we devote a section to calculating this quantity. Consider a small section of a rod, a radius r ...
As noted in section 1 of this lecture, the process known as biological nitrogen fixation (BNF) takes place in nodules located on the roots of the plants. Thus, before BNF can begin nodules must be formed. In general terms, nodules are formed as a result of infection of the roots by soil bacteria. In the case of forage ...
How 3D Printing Works 3D printing sounds like something from science fiction, but the process is similar to that of CNC machining, where billets are cut into specific shapes and products. But rather than cutting, it prints. A 3D printer works by “printing” objects–but instead of using ink, it uses more substantive mate...
Bathymetry is the study of the underwater terrain of lakes or ocean floors. It is the same as topography, except that it looks at the underwater topography. It is a field of oceanography. The name comes from Greek βαθύς (bathus), meaning "deep", and μέτρον (metron), meaning "measure". Bathymetric (or hydrographic) char...
Your budding poet can practice his rhythm in this worksheet. He'll read two poems by Robert Louis Stevenson and determine their rhythm. Your young poet can review the important concepts of rhyme and rhythm by completing some practice exercises based on this poem. Practicing poets can refine their sense of meter and rhy...
Aristotle was a classical Greek philosopher taught by Plato. He continued the same project of philosophy that Plato was doing, but believed that he was correcting many of Plato’s errors. He wrote on many subjects including science, logic, philosophy, politics and ethics. Aristotle’s life began in 384BC in Stageira, Cha...
Hypothesis Teacher Resources Find Hypothesis educational ideas and activities Showing 141 - 160 of 279 resources Students use the scientific process of investigation to explore the mechanics of making ice cream, bread, pancakes, Kool-Aid and cake. They research foods and agriculture from the 1930's. Instead of dreading...
The blue whale (scientifically referred to as balaenoptera musculus) is a large marine mammal that is part of the baleen whale (mysticeti) suborder and is the largest animal alive growing to lengths of up to 100 ft. long and weighing as much as 150 tons or more. In addition to the blue whales massive size it is also on...
7.7°in Alice Springs Why is it that after one billion years of evolution trees still do not grow above the 3,000 metre level? Have they shifted with time? Why is it that after one billion years of evolution trees still do not grow above the 3,000 metre level? It seems weird that they haven't adapted to lower temperatur...
Chapter 7: Disorders of Emotional Communication EMOTIONAL COMMUNICATIONDisorders of emotional communication include problems expressing one's own feelings and misunderstanding the feelings of others. Emotion is communicated in facial expressions, body movements, body language, tone of one's voice, pace of words, and in...
( 15) GERUNDS and PRESENT PARTICIPLES Gerund is a word that functions as a noun. It is derived by adding ‘–ing’ to the end of a verb (jog), e.g. “Jogging is a good way of exercising”. A present participle is formed by adding ‘-ing’ to the verb, as in ‘reading’., e.g. “He may be reading the newspaper now”. A gerund is u...
On Your Mark, Get Set, Read! Rationale: Reading fluency is the ability to recognize words accurately, rapidly, and automatically. Time and practice are essential components for becoming a fluent reader. An excellent way to practice fluency is through rereading the text and testing your comprehension of what you read. F...
The development of road systems in national parks involved interrelated political and economic issues. Although based in the idealism of the Organic Act that established the National Park Service, park development relied on appropriations that were linked to visitation. During the late 'teens and 'twenties the National...
When it’s setting up a powerful shockwave in space made up of high-speed particles accelerated to nearly the speed of light, that’s when! Back in February 2007 the Cassini spacecraft passed through Saturn’s magnetosphere and, just as it had done many times before, crossed through the “bow shock” created by the planet’s...
One of the foundational elements of education in West Virginia is that all students will have equitable education opportunities. Equity in education for high ability students, who may already be proficient in grade-level skills, is making forward progress in their learning. As for all learners, an appropriate education...
In Tokyo, Commodore Matthew Calbraith Perry, representing the U.S. government, signs the Treaty of Kanagawa with the Japanese government, opening the ports of Shimoda and Hakodate to American trade and permitting the establishment of a U.S. consulate in Japan. In July 1853, Commodore Perry sailed into Tokyo Bay with a ...
There are numerous graphing options when it comes to presenting data. Here we will take a look at the most popularly used: pie charts, bar graphs, statistical maps, histograms, and frequency polygons. A pie chart is a graph that shows the differences in frequencies or percentages among categories of a nominal or ordina...
Which of the models shows halves? The model in C shows 2 equal parts, or halves. How many of the halves are shaded in C? How can we say and write this fraction? We say, "one half." We write this as Which of the models shows thirds? The model in A shows thirds. Does B show fourths? Why? Yes; there are 4 equal parts. In ...
Seven years ago this week, NASA’s Mars Exploration Rover (MER) Opportunity landed at Meridiani Planum on the surface of the planet Mars. Incredibly, the robotic rover continues to gather geological, atmospheric and astronomical data well beyond its design mission duration of ninety (90) Martian days. Mars is the 4th pl...
Folsom complex, an early archaeological complex of North America, characterized by a distinct leaf-shaped projectile point called a Folsom point. The Folsom complex of artifacts, which also includes a variety of scrapers, knives, and blades, was one variety of the Paleo-Indian hunting cultures. It centred in the Great ...
Soil is a living system, has 6 layers called horizons O, A, E, B, C and R. It acts as a filter for underground water, filtering out pollutants. There are more microorganisms in a handful of soil than there are people on earth. Soil consists of 45% minerals, 25% water, 25% air and 5% organic matter. Soils are key in car...
Science Fair Project Background Research Plan Key InfoBackground research is necessary so that you know how to design and understand your experiment. To make a background research plan — a roadmap of the research questions you need to answer — follow these steps: - Identify the keywords in the question for your science...
The first two-thirds of Earth's history is called the Precambrian (meaning "before the Cambrian"), 4500 - 550 million years ago. It is also known as the Archaeozoic Era. The Earth was formed about four and a half billion years ago. Only after the Earth's crust had hardened and the atmosphere and hydrosphere were formed...
Stable equilibriums in mathematics and physics consist of situations where the energy at a function minimum is lower than all surrounding points, while unstable equilibriums are surrounded by lower energy points. The behavior of a ball placed on a hill or in a valley provides an intuitive example.Continue Reading Stabl...
Where do the laws come from? The laws that affect you as a Victorian come from four places: the Australian Constitution, Victorian and federal legislation and cases decided by the courts. The Australian Constitution is Australia’s highest law. It outlines how power must be shared between the federal and state parliamen...
For centuries, humans have dreamed of harnessing the power of the sun to energize our lives here on Earth. But we want to go beyond collecting solar energy, and one day generate our own from a mini-sun. If we’re able to solve an extremely complex set of scientific and engineering problems, fusion energy promises a gree...
We are facing an antibiotic resistance crisis. Almost every health authority has sounded the alarm and the most recognized authority, the World Health Organization, is doing all it can to slow the arrival of the post-antibiotic era. Yet, even as these calls are made, the use of these drugs both in medicine and agricult...
Ohio University scientists have found the oldest definitive fossil evidence of modern, venomous snakes in Africa, according to a new study published March 19 in the journal PLOS ONE. The newly discovered fossils demonstrate that elapid snakes—such as cobras, kraits and sea snakes—were present in Africa as early as 25 m...
Drought is a problem facing many parts of the world. It is a normal climate event that occurs from time to time; however, the cause is often not “natural”. Drought is often confused with aridity. Aridity is a permanent climate change, whereas drought is recoverable. According to the National Drought Mitigation Cent...
The lighthouse was built in response to the many shipwrecks that occurred in the treacherous and busy bays of the Mendocino coast. Later in the twentieth century, technological developments nearly resulted in the loss of this national treasure. Click to learn more: Long before ships sailed off the Mendocino Coast, the ...
Japan has a rich history of its civilization, culture, politics and so on. The history of the country includes the history of the islands of Japan, its people. Beginning from the ancient time period, the history stretches towards the modern period. From the most intriguing kingdoms, to the politically intense history o...
This article for teachers suggests ideas for activities built around 10 and 2010. During the third hour after midnight the hands on a clock point in the same direction (so one hand is over the top of the other). At what time, to the nearest second, does this happen? Which times on a digital clock have a line of symmetr...
Blood disorders define any abnormality with the blood, including abnormally or odd-shaped blood cells. Red blood cells carry vital oxygen and nutrients to all organs, tissues and cells of the body. Any abnormality in their shape affects their function. Understanding how abnormally shaped blood cells can affect your hea...
Using phonics to teach your child to read is the first step to making them independent readers. See how CVC words can help build their confidence at the outset. “Children are made readers on the laps of their parents.” — Emilie BuchwaldFor children to start reading, parents have to first understand how to teach reading...
For the first time, astronomers have discovered a class of exoplanets whose atmospheres have been seared away by heat, removing any doubts about what happens when a rocky object wanders too close to a star. Theorists have long speculated that exoplanets snuggled right up next to their host stars would be subject to “st...
Big stones – literally mega-liths – were widely used by prehistoric communities to build monuments, burial places, and sanctuaries. Many survive as enduring and fascinating features in our modern landscapes. The earliest known megalithic structure is at Göbekli Tepe (Turkey) where decorated T-shaped pillars up to 6m ta...
On July 20, 1969, Neil Armstrong and Buzz Aldrin landed on the moon and took their first steps on the lunar surface. Half a billion people around the world watched live television images that recorded the event. The landing was, without a doubt, one of the most significant achievements of modern civilization. It is mad...
This can be used as a station activity. Station 1: Students will play fraction memory to compare the fraction to it's picture. Station 2: Students will draw their own representation of fractions and come up with the fraction from a picture. Station 3: Fractions in a bag, students will use the shapes in a bag and comple...
Have you ever wondered how chips such as microprocessors, video processors, memories, chipsets etc are created and manufactured? In this tutorial we will explain everything you need to know about chip manufacturing process. Semiconductor manufacturing process can be summarized in the following steps: - Chip design: Whe...
History [of concept of mathematics] Babylonian and Egyptian mathematics emphasized arithmetic and the idea of explicit calculation. But Greek mathematics tended to focus on geometry, and increasingly relied on getting results by formal deduction. For being unable to draw geometrical figures with infinite accuracy this ...
Graphing rational functions can be quite challenging. One of the most important aspects of graphing rational functions is determining the asymptotes of the graph. An asymptote, generally, is a line that the graph of the function can not cross. This is always the case with vertical asymptotes, but not always the case wi...
This paper compares the French Revolution and the American Revolution. This paper gives a general history of the American and French Revolutions. The author compares and contrasts these two significant pieces of history. A discussion of the causes for both revolutions and how the enlightenment played a major role in bo...
Pontoon Bridge - 480 BC A major obstacle in the path f the Persian King Xerxes' army was the Hellespont, a waterway at the head of the Aegean that was nearly a mile wide at its narrowest and separated Asia Minor from Europe. Xeres bridged the gap with ships, not in a ferrying operation but by constructing a unique pair...
The range operator is used as a shorthand way to set up arrays. When used with arrays, the range operator simplifies the process of creating arrays with contiguous sequences of numbers and letters. We'll start with an array of the numbers one through ten. For example tp Create an array with ten elements that include 1,...
The Blackbird is a land car that is able to go directly downwind faster than the wind. In a 13.5 mph wind, the Blackbird reached a 38.5 mph sustained speed as verified by NALSA (North American Land Sailing Association). While sailors have been able to sail faster than the wind for hundreds of years, they have done this...
Regions in a plane have a number of interesting properties that one-dimensional figures don't. Two such properties, and very important ones at that, are perimeter and area. The perimeter of a region in a plane is the length of the curve, or curves, that bound the region. Finding the perimeter of a polygon is easy; one ...
Student understands the concept of magnetism |*Level 2 tasks attempted but not completed or mastered. *Student understands how a compass operates and that some metals contain a property known as magnetism. *Student knows that a compass is made up of a tiny magnet that aligns itself with a larger magnetic field. *Studen...
|home | alphabetical index| TundraIn physical geography, tundra is an area where tree growth is hindered by low temperatures, short growing seasons, and low precipitation. The term tundra comes from the Finnish word tunturia, which means treeless plain. There are two types of tundra: arctic tundra and alpine tundra. In...
The first trees to have ever grown on Earth were also the most complex, new research has revealed. Fossils from a 374-million-year-old tree found in north-west China have revealed an interconnected web of woody strands within the trunk of the tree that is much more intricate than that of the trees we see around us toda...
Oldest modern human fossil discovered in Ethiopia 25 July 2003 A team of 45 scientists from 14 different countries led by Professor Tim White from Berkeley University has uncovered and assembled three fossilised skulls from Ethiopia that provide the oldest record of modern humans. The fossils give strong support to wha...
Long before we lived here, New York State was home to the powerful Iroquois. Today’s Classroom Extra takes a look at this Native American nation, which formed a powerful confederacy. THE Iroquois, along with the Lenape and Algonquin, were among the first to call New York home. Archaeologists have found evidence of thei...
Researchers have established the height of the Greenland and Antarctic ice caps with greater precision than ever before By Tim Radford Scientists have been able to measure more accurately than ever the thickness of the world’s major ice caps – revealing that melting is causing the loss of 500 cubic kilometres of ice an...
A Transactional Strategies Approach to Comprehension Instruction Students have difficulties in reading comprehension. Most institutions have a large percentage of students who have difficulties in reading comprehension. The difficulties result from learning disabilities. Children having learning disabilities are likely...
Aim: How can annotating help us figure out the mood of a text? By the end of this lesson, students will be able to (SWBAT): - Annotate students story to figure out their mood - List claims on what mood the student was in during each event - What is meant by the term annotation? - How can annotating be used to help us f...
This lesson aligns with the Common Core State Standards: STANDARD 5 - Matter and Energy "The teacher understands the nature and properties of energy in its various forms, and the processes by which energy is exchanged and/or transformed. 5A. understands the atomic and nuclear structure of matter and the relationship to...
It can be difficult and time consuming to develop materials for really good science lessons. Many scientific research organisations, however, provide teaching resources, often designed together with teachers. Researchers provide scientific expertise and the teachers bring years of experience in the classroom. These mat...
Almost 60 years ago an astrophysicist named Eugene Parker published a paper describing what he believed to be high speed matter and magnetism emanating from the sun. For just as long, scientists have sought to learn the mechanisms behind this far-reaching phenomenon, which we know today as solar winds. NASA says advanc...
The Desert Tortoise,Gopherus agassizii, was listed as a threatened species April 2, 1990 by the US Fish and Wildlife Service. Populations have declined recently in many areas due to two main human attributable reasons: the direct loss of individuals and habitat degradation / fragmentation. Individual tortoises are lost...
Throughout the Montessori approach there lies a basic idea that uses materials and methods to enhance development of all senses. While the children manipulate the apparatus they are able to differentiate, compare, discriminate and explore. These exercises provide the child with stimuli that triggers intense concentrati...
Feelings in Spanish are part of the curriculum of most elementary programs. More important, they are essential vocabulary for helping kids identify and communicate their emotions. TakeLessons has created an infographic that to help kids express their feelings in Spanish. Along with cute graphics, they have included the...
The unequal heating of Earth is the driver of atmospheric convection currents. These air circulation patterns are further modified by the deflecting action of the Coriolis effect. The Global Circulation Patterns helps distribute heat and water vapor across the globe, therefore causing different climates and weather. Th...
It is estimated that 15% to 20% of all babies born worldwide are low birth weight, representing more than 20 million births a year. Defined by the World Health Organization (WHO) as weight at birth less than 2500 grams or 5.5 lbs, low birth weight is a major predictor of infant death and disease. Every year, 1.1 millio...
There are many computers in California, but only one of them is running inside a living yeast cell. Future models of the living computer, made from the DNA-like molecule RNA, could be used to run calculations in vivo – that is, inside human cells – to release drugs or prime the immune system at the first hint of illnes...
The way Christmas is celebrated now is quite different from the celebrations during the medieval ages or the Roman era. Ancient Christmas Celebrations Jesus was born approximately 2000 years ago, in Bethlehem of Judea. But it was not until 300 years later, when the Roman Emperor Constantine recognised Christianity and ...
A new study shows that infection with hookworm, ringworm, and similar parasites can be dramatically reduced with a sanitation program. The researchers found even installing simple latrines can cut infection rates in half. Parasitic worms thrive in tropical and subtropical climates - areas that are home to some of the w...
“Learning, as a language based activity, is fundamentally and profoundly dependent on vocabulary knowledge.” * This is the first in a series of posts about vocabulary. Some practical teaching ideas will follow. Here, I discuss the necessity for a focus on vocabulary as a method of ‘closing the gap’. ‘The Matthew effect...
Poland reemerged as an independent nation as a consequence of World War I. It was formed largely of territory expropriated at the end of the eighteenth century by Prussia, Russia, and Austria. Save for the Baltic Sea, Poland after World War I lacked natural frontiers. Poland also claimed considerably more territory tha...
WHAT IS SOIL ? The word soil is derived from Latin word ‘solium’ which means upper layer of earth’s surface. This word ‘soil’ has different meaning for different professions. For an agriculturist, it is the loose surface material of the earth is which plants grow. For a geologist, it is the material which is produced a...
War of Independence of Brazil(Redirected from Brazilian War of Independence) This Independence of Brazil duplicates the scope of other articles. (July 2014) The War of Independence of Brazil (also known as the Brazilian War of Independence) was waged between the newly independent Empire of Brazil and United Kingdom of ...
For the first time, researchers have sustainably produced hydrogen gas, a potential source of clean energy, using only water and bacteria. The challenge now, scientists say, is to scale up the process to provide large amounts of hydrogen for various purposes, such as fueling vehicles or small generators. Hydrogen may b...
Saturday would have been the 100th birthday of Alan Turing, the English mathematician widely regarded as the father of computer science. Among his many contributions to the world is the Turing machine, a device that helped define two fundamental ideas for the Information Age: algorithm and computation. The machine, as ...
Sir Isaac Newton received several honors including knighthood, the consideration as the top mathematics professor at Cambridge, a seat in Parliament and the Lucasian Chair of Mathematics at Cambridge. Sir Isaac Newton was a mathematician, astronomer, philosopher, scientist and physicist that lived from 1643 to 1727.Con...
In this week’s episode, we’ll explore the influence the reformation and counter-reformation had on the world of music including the work of Giovanni Pierluigi da Palestrina. On All Saint’s Day, 1517, Martin Luther nailed a piece of paper on the door of Castle Church in Wittenberg, Saxony. That moment is usually defined...
High above the surface, Earth’s magnetic field constantly deflects incoming supersonic particles from the sun. These particles are disturbed in regions just outside of Earth’s magnetic field – and some are reflected into a turbulent region called the foreshock. New observations from NASA’s THEMIS – short for Time Histo...
Many students are accustomed to using number patterns in order to generalise. This problem offers an alternative approach, challenging students to consider multiple ways of looking at the structure of the problem, through making sense of other people's approaches, an important part of working mathematically. The powerf...
Speaker and Other Presiding Officers The Speaker is the Member elected by the Members of the House of Commons to preside over proceedings in the Chamber. He or she is responsible for maintaining order and decorum in the Chamber. The Speaker also oversees the administration of the House and is the spokesperson and repre...
Scientists have made a discovery which could lead to finding ways to stop the spread of certain bacteria that cause food poisoning. Many bacteria can swim, allowing them to infect and spread in the case of pathogenic species. Almost all swimming species of bacteria move using corkscrew-like propellers called flagella. ...
Writing history papers employs different conventions than what you may be used to practicing in language arts classes. History writing starts with a problem or question for which evidence is selected and interpreted to support a formulated response to the problem. The synthesized evidence is often organized based on th...
Robotics/Types of Robots In general, robots are classified based on their capabilities. Some standard classifications of robots include their domain of operation, degree of autonomy, and the goal they are designed to fulfill. Domain of Operation Robots can be designed and built for any environment imaginable. One popul...
Paddle or Racket Activities for Elementary P.E. Coordination is an important skill that children must learn and work to master. Some physical education activities promote this skill more than others. Activities that use paddles or rackets allow students to practice their hand-eye coordination and to master the skills n...
Part of what makes Yellowstone National Park so special is the supervolcano upon which it sits. Also known as the Yellowstone Caldera, the supervolcano’s major features measure about 25 by 37 miles. And so when something of that magnitude stops and takes a breath, the entire park feels it. A substantial area of the par...
Comet ISON will pass 1.2 million miles from the center of the sun on November 28, 2013, according to NASA’s Near Earth Object Program at the Jet Propulsion Laboratory in Pasadena, California. When the object passes by Earth’s night sky, it could be brighter than the moon. The comet will grow increasingly bright as it p...
The Touro Synagogue in Newport, R.I., has long been a symbol of tolerance, beginning as a haven for Jews who escaped the Inquisition. Later it served as a sanctuary for African-Americans who escaped slavery. Touro Synagogue was consecrated on Dec. 2, 1763. It is the only synagogue built in Colonial America that still s...
Sea turtles have been swimming in the oceans for over 100 million years and even survived the dinosaur extinction. If you’ve ever gone snorkeling or diving in a tropical region, you’ve probably seen one. You can spot them either in the open ocean, or most commonly, in coastal habitats. Seven species of sea turtles exis...
Meandering – when rivers snake in the landscape Meandering is common in the rivers in the lower reaches of the rivers, where the river changes its course through time. Rivers that carry fine-grained silt and clay in suspension tend to be narrow and deep and to develop pronounced, sinuous curves called meanders. These b...
Harriet Jacobs was born a slave in Edenton, North Carolina, in 1813. She escaped slavery and became an abolitionist speaker and reformer. Over hundred years after her death, we are reflecting back at her life and legacy. A life of endless struggles When she was about six, Harriet Jacobs found out that she was the prope...
Drawing Cylindrical Objects Using Spirals One of the basics of drawing well is to understand how to break down objects into shapes. For example, a house is a cube, as is a box or a ball is a sphere, as is an apple. This sounds easy, but simply put, it isn`t! For example, drawing a cylinder involves complex ellipses, wh...
The Nuremberg Laws were two laws which excluded the Jews from German life, as well as took away some of their natural rights. They were first declared at the annual Nazi rally held in Nuremberg in 1935. At that rally, Hitler delivered a speech about the Jewish controversy to unite party activists and state officials to...
Over 100 billion people have walked the planet, making a gigantic stamp on the Earth. Around three quarters of the land and around two-thirds of the marine environment have been significantly altered by humans, impacting the carbon cycle and changing the prospects for many species. 2 minute read Approximately one milli...
The Mayflower was the ship that in 1620 transported 102 passengers, including a group of people seeking religious freedom. Their original destination was the Virginia Colony but they were forced to land instead at the Cape Cod hook. Their story is one of suffering and survival in a harsh environment. The voyage is one ...
Humans were changing the planet earlier than we knew Humans had caused significant landcover change on Earth up to 4,000 years earlier than previously thought, University of Queensland researchers have found. The School of Social Sciences' Dr. Andrea Kay said some scientists defined the Anthropocene as starting in the ...
A day we are dedicated to today’s woman. World Women’s Day is celebrated annually on March 8, in memory of a significant protest on March 8, 1857, by textile workers in New York who demanded better working conditions. World Women’s Day is celebrated annually on March 8, in memory of a significant protest on March 8, 18...
June 25, 2019 report Evidence of capuchin monkeys using tools 3000 years ago A team of researchers affiliated with several institutions in Brazil and the U.K., has found evidence of capuchin monkeys using stone tools as far back as 3,000 years ago. In their paper published in Nature Ecology and Evolution, the group des...
Two important concepts for the development of genetics in the early twentieth century were those of phenotype and genotype, created by the Danish researcher Wilhelm L. Johannsen (1857 - 1912). The term “phenotype” (from Greek pheno, evident, brilliant, and typos, characteristic) is used to designate the characteristics...
Local governments use rock salt in the winter to melt ice on the roads. You knew that already. What you might not know is that some of that salt comes from beneath the roads themselves. Detroit and much of the Great Lakes region sit on top of a prehistoric salt deposit, the remains of an ancient sea. How did it get the...
Effects of Climate Change Today Over 100 years ago, people worldwide began burning more coal and oil for homes, factories, and transportation. Burning these fossil fuels releases carbon dioxide and other greenhouse gases into the atmosphere. These added greenhouses gases have caused Earth to warm more quickly than it h...