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Which event can cause a large rock to become soil over time? | [
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An escalator at a shopping mall is 10 m long and moves at a constant speed of 0.5 m/s. If Jose steps onto the escalator at the bottom while it is moving, how long will it take him to travel the 10 m? | [
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A student wants to use a stream table to test the influence of water acidity on the erosion rate of a stream. Which variable should be constant in this experiment? | [
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A student compared the speeds at which a large and a small marble rolled down an inclined plane. In order to make the findings more reliable, the student should | [
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The water cycle describes the movement of the water of Earth. About 96% of the water of Earth is the salt water found in the oceans while the remaining 4% is fresh water. Where would the majority of the freshwater on Earth be found? | [
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Which of these is an example of an adaptation for defense from predators? | [
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A crop of corn plants is genetically modified so that the plants produce a natural pesticide. People are concerned that these corn plants might transfer modified genetic material to other plants. Which of the following is the best way to further modify the plants to prevent them from transferring their genetic materials to other plants? | [
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If a book sitting on a flat table starts to move horizontally, it is most likely moving because | [
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Which is a chemical change? | [
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What adaptation is necessary in intertidal ecosystems but not in reef ecosystems? | [
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During which phase change is heat energy absorbed by a substance? | [
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Scientists launch a rocket into space for a mission. Once the rocket escapes the gravitational pull of Earth, how will the mass and weight of the rocket be affected? | [
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What is the main function of the circulatory system? | [
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Water evaporates and falls back to Earth as rain or snow. What is the primary energy source that drives this cycle? | [
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Based on the Doppler effect, the electromagnetic waves reaching Earth from a galaxy that is moving away from Earth would be expected to | [
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Astronomical units can be used to measure distances between objects in outer space. One astronomical unit (AU) is the distance between Earth and the Sun. Based on this information, about how many astronomical units is Mars from the Sun? | [
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Which characteristic of a kitten is an acquired trait due to environmental influences? | [
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A group of students are studying bean plants. All of the following traits are affected by changes in the environment except | [
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Which best describes how ice cores are important to the study of geologic history? | [
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A strong magnet will separate a mixture of | [
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What can a flower become? | [
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Which material should be used on a bicycle ramp to increase friction? | [
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When moist air comes in contact with a cold surface in the winter, one result can be frost. What has happened to the water vapor in the air to cause frost? | [
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One type of cold remedy is an effervescent tablet that breaks down in water. When the tablet is placed in water, it forms gas bubbles. In this example, the formation of a gas | [
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The water cycle describes the continuous movement of the water of Earth. Which part of the water cycle is directly responsible for returning water to the soil? | [
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The gravitational force of the Sun affects the planets in our solar system. Which of these is influenced the most by this force? | [
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Four identical candles are set on a safe surface and lit. One is covered with a small-sized jar, one is covered with a large-sized jar, and one candle is left in the open. A fourth lit candle is placed in a vacuum. Which candle will most likely stay lit the longest? | [
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Jeremiah noticed a plant had many missing leaves and large holes in other leaves. Why do missing leaves hurt the plant? | [
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A hydrologist is studying the acidity level of a city lake. She collects samples twice a week and takes them to her lab to test them. After testing the samples, she places the data on a graph. She tells the city engineers that her tests indicate that the pH level has been steadily dropping over the past few months. Which of the following steps is the best way to check the accuracy of her data? | [
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A sign that an apple tree is going to start growing apples is when the tree has ___. | [
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Which change will occur in the wire of an electrical circuit that is working properly? | [
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Farmers plant fruit trees in an area that was once a grassy meadow. Which will most likely happen to the rabbits living in the meadow? | [
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Scientists study fossils to learn about | [
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Which function makes a plant cell different from an animal cell? | [
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How many chromosomes are in a human sperm cell? | [
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Michelle performed an investigation but the results did not match her hypothesis. What should Michelle do next? | [
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Comparing the skeletons of which of the following fish would best show the evolution of a fish species? | [
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Which of the following is NOT a description of compounds? | [
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Tommy cut his finger. His body needed energy to help heal the cut. Where did the energy come from to heal the cut? | [
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According to the fossil record, the first horses were smaller than modern species. Throughout time, horses have gradually changed | [
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Which group consists only of living things? | [
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0.008937... |
Wind turbines are being used to generate electricity in many parts of the United States. One advantage of wind turbines is that no fossil fuels are burned. Which of the following is a disadvantage of wind turbines? | [
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Which of the following Earth layers has the greatest density? | [
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Street maps are examples of two dimensional models. Which information cannot be determined using a basic map? | [
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The body of a fish is covered by scales for | [
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Electricity has many uses. Which device is designed to transform electrical energy into useful heat energy? | [
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Which of these is a property of water that allows it to transport materials through the Earth system? | [
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Which system has layers of smooth muscle tissue that contract to move solid and liquid nutrients and waste through the body? | [
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A male fruit fly is homozygous dominant for gray-body color (G) and is crossed with a female fruit fly that is homozygous recessive for ebony-body color (g). What are the probable phenotypes of the offspring? | [
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Using nonrenewable resources for energy produces waste products that can have long-term, negative effects on Earth's subsystems. Which energy source produces waste products that can have these effects for the longest amount of time? | [
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After a forest fire, which type of organisms will begin secondary succession? | [
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Sodium, Na, is in the same group as | [
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Della has a mixture of soil and water in a jar. Which of the following tools would best help Della separate the soil from the water? | [
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Joann is testing soils to see which kind is best for growing marigolds. Which of the following should she do? | [
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A lake has been used for more than a century to irrigate crops. How has this practice most likely affected this resource? | [
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In the carbon cycle, carbon moves from reservoir to reservoir as various organic and inorganic processes occur on Earth. Only a small percentage of the global carbon is moved in this cycle each year. The remaining carbon is stored in these reservoirs. Which reservoir contains the greatest amount of stored carbon? | [
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Which of these activities is used to conserve water? | [
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Which of these is not an inherited trait in humans? | [
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Soils change both through natural processes and as a result of human activity. Which of the following soil changes is due only to natural causes? | [
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An experiment is being conducted to determine the air quality inside a building. In order to come to a conclusion, scientists must gather data. Which of the following would be an excellent source of data from which to draw a conclusion? | [
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Volcanic eruptions early in Earth's history are believed to be responsible for a large proportion of the matter now found in which Earth structure? | [
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A statue and a table are both made of the same type of marble. Which of the following properties will most likely be the same for both of these objects? | [
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What enabled Galileo in the 17th century to see the moons of Jupiter? | [
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Which is the best evidence that cell division is occurring constantly in our bodies? | [
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Many products are made from trees. Which is the best way to manage the use of trees? | [
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Which substance is a compound? | [
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Most volcanoes develop due to interactions between two tectonic plates. Which of the tectonic plate interactions is least likely to produce volcanic activity? | [
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As the molecules of water begin to slow down they go into a phase where they are no longer able to easily move past each other. The water is passing through a phase change and will | [
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A student pushes a shopping cart filled with groceries. The cart has a mass of 12 kilograms (kg). The student pushes the cart with a force of 15 newtons (N). Assuming the ground is frictionless, how fast will the cart accelerate until the student stops applying the force? | [
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Cindy learned that trees release gases into to the air during photosynthesis. What gas does a tree release? | [
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In a grassland ecosystem, organisms of the same species eat the same food. When there is a lack of rain, which is most likely increased? | [
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Ten grams of sugar is dissolved in 100 grams (g) of water. How many grams is the sugar-and-water solution? | [
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Mr. Jenkins constructed a circuit consisting of a variable source, wires, and a resistor. In order to triple the amount of current, how should he change the voltage of the source? | [
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As humans travel in space, which gas is provided in the atmosphere of the spacecraft and which gas is removed from the atmosphere of the spacecraft? | [
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Cellular respiration results in the production of adenosine triphosphate (ATP) molecules for energy. The most efficient form of cellular respiration would result in the production of ATP along with which substances? | [
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Some foods that humans eat, such as corn and peas, are actually seeds from plants. What best describes the role of humans in a food web containing these plants? | [
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Which is true of the seasonal weather patterns of places that are at the same latitude? | [
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Which gas is given off by plants? | [
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Aluminum containers can be melted and made into new products. How will recycling aluminum most likely benefit communities? | [
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In the 1500s, Nicolaus Copernicus proposed a new theory on the heliocentric structure of the solar system. Which of these statements best describes this new theory? | [
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As a glacier melts and retreats, a layer of bedrock is exposed. Which term best describes the process that establishes a community on the bedrock? | [
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Four solid balls, each with a different mass, are moving at the same speed. Which ball would require the most force to stop its motion? | [
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Which is true about the Sun and Earth? | [
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A turtle eating worms is an example of | [
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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. On Hirta, sheep with light wool outnumber sheep with dark wool because sheep with light wool | [
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What do ice, a rock, and a piece of aluminum have in common? | [
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Which trait do children most likely inherit from their parents? | [
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New evidence suggests that "hot spots" may form in response to "twisting" stresses on plates. It is theorized that these stresses may eventually result in the splitting apart of the tectonic plate in the area of the hot spot. Which of the geographic features would be affected most by the splitting of a tectonic plate? | [
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Which best determines the number of wolves that can live in an area? | [
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How do the sprouts of seeds buried in complete dark in the soil find their way to the surface of the soil? | [
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For his science project, Alan began a study of sugar maple trees. He noticed many differences among the sugar maple trees near his school. Which of the following three characteristics would vary the LEAST? | [
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The students observed a large crack found in a boulder with a tree growing out of it. Which process were the students observing? | [
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A company is creating an advertisement for its custom-made guitars. Which of the following statements should be in the advertisement to best emphasize the company's custom production processes? | [
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According to a pH scale, which pH would be the strongest acid? | [
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Many factors affect human health. Which term best describes diet and exercise for most adults? | [
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Scientists are collecting samples from sediment deposits in Biscayne Bay. Test results show that salinity in the bay is increasing. Which human influence might have led to this environmental change? | [
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Which of these statements is most accurate about the Sun? | [
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Which item below is NOT made from a material grown in nature? | [
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A drop of red food coloring is added to a bowl of water. Several minutes later, all of the water is red. Which of these describes the change that took place? | [
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A mouse is homozygous for black fur (BB). The other parent is heterozygous for black fur with a recessive trait for brown fur ( Bb ). If black is the dominant trait, what percentage of the offspring will be brown? | [
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0.03354088217020035,
0.043069541454315186,
0.01612725667655468,
-0.0185451... |
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