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Which part of a pine tree makes food? | [
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How many basic units of information in a DNA molecule are required to encode a single amino acid? | [
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The crust, the mantle, and the core are structures of Earth. Which description is a feature of Earth's mantle? | [
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Which factors can have the greatest effect on the health of a river system? | [
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Which relationship results in the highest level of evaporation from Earth's water reservoirs? | [
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A student is asked to make soil using the following substances: water, ore, humus, crystal, weathered rock, and metamorphic rock. Which combination of these substances should the student choose? | [
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Using fossil fuels wisely and avoiding waste is an example of | [
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Which two systems are involved when waste and water are removed from blood as it flows through the kidneys? | [
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George wants to warm his hands quickly by rubbing them. Which skin surface will produce the most heat? | [
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Four students compared the total mass of the products to the total mass of the reactants after performing three trials of the same chemical reaction. Each student concluded that the total mass of the products was slightly less than the total mass of the reactants. Each student proposed a different explanation as follows. Student 1: The reaction converted some of the reactant mass to energy. Student 2: The chemical reaction produced a gas that escaped. Student 3: Some of the mass measurements were made with insufficient precision. Student 4: Heat released during the reaction caused the volume of the products to increase.Which students offered the most reasonable explanations? | [
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Repeating experiments improves the likelihood of accurate results because the overall results are | [
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Which of the following is an observation about grasshoppers that a science class could have made on their nature walk? | [
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What tool would be most useful to calculate the volume of a glass prism? | [
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It takes approximately 365 days for | [
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How does a tiger get stripes? | [
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Mice, rabbits, bobcats, and squirrels all live in a brush ecosystem. Which animal would have the most difficult time surviving if the population of the other three animals continued to decrease? | [
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Aquaculture is the raising of freshwater and marine plants and animals for food. How would a company raising fish best demonstrate good stewardship of natural resources? | [
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Sheep Challenge Evolution A species of sheep lives on the Scottish island of Hirta. Hirta has plenty of grass for the sheep to eat, and no natural predators of the sheep live on the island. Some sheep have dark wool, and some have light wool. The sheep with dark wool tend to be much larger and stronger than the sheep with light wool. However, researchers have found that in the last 20 years, the sheep with light wool have increased in number. Usually, strength and size help animals survive and breed. A new sheep predator is introduced to the island. Which change to the sheep population will most likely occur first? | [
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An ice cube placed in sunlight melts quickly. Which BEST explains this event? | [
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A mutation that occurs in an organism that reproduces sexually will most likely affect the traits of the offspring if the mutation | [
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In whitetail deer, females seldom grow antlers. Which best explains why male whitetail deer grow antlers but females seldom grow antlers? | [
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Two students are studying what makes ice melt fastest. They want to conduct an investigation. During which of these steps in their investigation will they measure the ice? | [
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Which of the following best describes a change in Earth's atmosphere made by early photosynthetic life? | [
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When potholders are used to remove hot pans from an oven, the potholders are serving as | [
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Earth makes a complete revolution around the Sun about once every | [
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Which measurement describes the motion of a rubber ball? | [
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Which mixture contains ingredients that can be easily separated? | [
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What is the best measure to use in determining the effect of solar energy on Earth's atmosphere? | [
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New engine technology has helped cars get more mileage per gallon of gas. Since gasoline comes from oil, this technology will affect the world supply of oil by | [
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A teacher builds a model of a hydrogen atom. A red golf ball is used for a proton, and a green golf ball is used for an electron. Which is not accurate concerning the model? | [
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Giant redwood trees change energy from one form to another. How is energy changed by the trees? | [
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Mara planted six pots of lettuce seeds. She placed three pots in a sunny area and three pots in a shaded area. She watered each pot the same and measured the growth of the lettuce. After Mara analyzes her data, what conclusion will it help her to make? | [
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To determine the boiling point of a liquid, a student must use all of these tools except | [
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Bees use pollen from flowers to make honey. Bees help flowers by | [
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As a sample of mercury changes state from liquid to solid, the atoms of the sample | [
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In December, one side of Earth will receive less energy from the Sun than the other side. Which statement best explains this fact? | [
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Which animal would most likely stay where it is? | [
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Earthworms move randomly throughout topsoil. How do earthworms most likely affect the topsoil? | [
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In which scenario below would natural selection most likely occur? | [
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Birds that do not receive adequate nutrition during development sing less often and for shorter periods of time as adult birds. Which best describes the outcome of nutritional stress in these songbirds? | [
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In a food pyramid, which best explains why the number of organisms decreases from one trophic level to the next? | [
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In which taxonomic group are organisms found that share the characteristic of storing hereditary material in a single loop of DNA? | [
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Which statement best explains why a car that is rolling on a level surface will eventually come to a stop? | [
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Skyler is selecting the kind of paper he wants to use to make a greeting card. He wants to select paper that does not tear easily. Which of the following features of the paper is most important for Skyler to consider? | [
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Which of the following areas is most likely to form metamorphic rocks such as gneiss and schist? | [
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Which of these will most likely increase a plant population in a habitat? | [
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Compared to the Sun, a red star most likely has a greater | [
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What is a benefit of the regulation of gene expression? | [
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Many houses are built on the sides of hills. Which of these actions would best prevent houses from sliding down hills after heavy rainfalls? | [
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The Ohio state tree is the buckeye. Which of these is a trait that is inherited by the buckeye tree in the reproduction process? | [
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Which of these is one similarity of the elements in the first group of the periodic table? | [
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A city wants to build a dam nearby to increase water supplies. Which question is most important to ask about the environmental effects of building the dam? | [
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People may remove fallen trees from forests to reduce fire risk. Removing the trees is now thought to have an impact on the health of the forest. Which impact would removing fallen trees from forests most likely have on forest health? | [
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Ice will form on small ponds when the temperature drops below 0°C. Which property of ice is most beneficial to fish living in these ponds? | [
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If a new moon occurred on June 2, when will the next new moon occur? | [
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Below is an advertisement found in a local newspaper. As shiny as diamonds at a fraction of the price! Buy "Simu-Gems" at Cost-Rite Jewelers. This advertisement suggests that Cost-Rite Jewelers' supplier | [
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A student used the dimmest setting on a light microscope to observe a euglena and an amoeba. The student shined a narrow beam of light at the top of the cover slip. She observed that the euglena swam up toward the light but the amoeba did not. She knew the amoeba was alive because it slowly changed shape while she watched. What inference should the student draw from her observation? | [
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Which situation is an example of an inherited trait? | [
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Some animals are very rare. For example, there are very few Siberian tigers. If the only Siberian tigers left are female, what will most likely happen? | [
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What is the frequency of ocean waves that have a speed of 18 m/s and a wavelength of 50 m? | [
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What MAJOR advantage does nekton have over plankton in locating food? | [
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Laundry detergents were once manufactured to contain high concentrations of phosphorus compounds. When waste water containing these compounds ran off into lakes, the phosphorous became a nutrient to algae. As algae populations increased in the lakes, succession accelerated. Over a long time, which would a lake become as a result of the phosphorous in the detergent? | [
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As an airplane climbs in the sky, the pilot notices ice crystals forming on the windshield. This happens because | [
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Laura prepared to roll a bowling ball down a lane. She swung the ball back with her arm. At the top of her backswing, the ball had a velocity of 0 meters per second (m/s). She swung her arm forward to release the ball down the lane. The ball left her hand with a velocity of 12 m/s. The time it took her to swing the ball forward was 0.5 seconds. What was the average acceleration of the bowling ball during her forward swing? | [
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Which of these is the main function of the vomiting reflex? | [
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An increase in phosphate levels in a lake increases the population of algae in the lake. Increased algae blocks sunlight into the lake and results in a decrease in dissolved oxygen in the lake's water. Which of the following should be expected as a result? | [
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Which type of landscape most likely existed millions of years ago in places where natural gas reserves are currently found? | [
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A farmer wants to know if adding fertilizer to his field will make his crops healthier. Which activity should the farmer do first? | [
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Trees most likely change the environment in which they are located by | [
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Tall plants are dominant to short plants. What is the outcome if two short plants are crossed? | [
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A solution with a pH of 2 can be increased to a pH above 7 by adding | [
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Many scientists think that burning fossil fuels has increased the amount of carbon dioxide in the atmosphere. What effect would the increase of carbon dioxide most likely have on the planet? | [
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Which phrase does not describe asexual reproduction in organisms? | [
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An owl hunts mice that live in a farmer's field. After the farmer gathers the crops, the mice have fewer places to hide. Which is most likely to happen after the crops are gathered? | [
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Which of these is found in all organisms? | [
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Which has the greatest effect on the color of a young eagle's eyes? | [
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A hot, boiled egg is put into a cup of cold water. What happens to the temperature of the water and the egg? | [
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Which statement is an observation? | [
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Which of these would be a model of diffusion? | [
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Which of the following is a central role of carbon in the chemistry of living organisms? | [
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Scientists have measured the rate of growth of the Atlantic Ocean basin to be about 2 to 3 cm per year. This type of activity coincides with the formation of ridges on the ocean floor. What is the most likely cause of this activity? | [
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Some students used a hot plate to heat 1 L of water from 20°C to the boiling point of water. The students recorded the temperature of the water each minute until it began to boil. Which of the following provides the most appropriate way to represent the data? | [
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After a windstorm, Niko called the electric company to report that he had no electricity. His phone call is an example of which of the following elements of a universal systems model? | [
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Storms transport water in the form of rain. The energy that starts this process comes from the | [
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A species of bird has not been seen since the 1900s and is considered extinct. Which evidence would best disprove the claim that the bird is extinct? | [
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An exploratory robot was sent to the planet Mars. The gravity on Mars is weaker than the gravity on Earth. Compared to the mass and weight of the robot on Earth, the robot on Mars has | [
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All of the following contain metric units of measurement except | [
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Which pair of human body systems functions most closely together? | [
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A tuna is an ocean fish that is well adapted to catching small, fast-moving prey. Which of the following adaptations most helps a tuna swim fast to catch its prey? | [
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Which of the following is a SOURCE of light? | [
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Before letting students use hammers to investigate how various minerals break, which question would the teacher most likely ask? | [
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Due to the increasing average temperature of the atmosphere, polar ice sheets melt at a greater rate than they form. Which of these will be an effect of the continued melting of polar ice? | [
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What is the composition of Saturn's rings? | [
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Which of these tools would be best to use when observing insects in a field? | [
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The average distance between Earth and the Sun is 149,600,000 kilometers. Which of the following is the correct scientific notation for this distance? | [
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0.0... |
In pea plants, tall is dominant over short. What size pea plants would result when two short plants are crossed? | [
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A student blew air into a beach ball and sealed it. She then pushed on the middle of the beach ball. What happened to the air inside the beach ball? | [
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0.00... |
The Big Bang theory states that the universe | [
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Which source of electricity would harm the environment the least? | [
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0.... |
Stars are organized into patterns called constellations. One constellation is named Leo. Which statement best explains why Leo appears in different areas of the sky throughout the year? | [
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-... |
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