Ques:Answer the following question given this paragraph: Currents are like rivers flowing through the ocean. Rivers always flow downhill because of gravity. What do you think causes ocean currents to flow?. Q: What causes rivers to always flow downhill? Choices: - slope - pressure - diffusion - gravity A:

Ans:gravity
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Ques:Answer the following question given this paragraph: Q: What are the two main parts of the human nervous system? Choices: - lungs, brain - lungs, spinal cord - brain, heart - brain, spinal cord A:

Ans:brain, spinal cord
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Ques:Answer the following question given this paragraph: Wavelength is one way of measuring the size of waves. It is the distance between two corresponding points on adjacent waves, usually measured in meters. Q: What is the term for the distance between two corresponding points on adjacent waves? Choices: - arc wave - variation - bandwidth - wavelength A:

Ans:wavelength
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Ques:Answer the following question given this paragraph: Ice wedging happens because water expands as it goes from liquid to solid. When the temperature is warm, water works its way into cracks in rock. When the temperature cools below freezing, the water turns to ice and expands. The ice takes up more space. Over time, this wedges the rock apart. Ice wedging is very effective at weathering. You can find large piles of broken rock at the base of a slope. These rocks were broken up by ice wedging. Once loose, they tumbled down the slope. Q: Why does ice wedging occur? Choices: - water melts - water freezes - water evaporates - water expands A:

Ans:
water expands
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