How do plants get the nitrogen they need to grow?
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a. they absorb nitrogen through their roots.
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b. they create it during respiration.
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c. they create it during photosynthesis.
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d. they absorb nitrogen gas from the atmosphere.

Ricardo notices that when he plays soccer in the rain, his ball does not seem to go as far after a kick. what is the best scientific question that ricardo could ask about this observation? is soccer better played in the rain or sun? how does rain affect the distance a soccer ball can travel? how does rain affect the speed of a soccer ball? is soccer affected by the rain?

What percentage of light hits earth's surface directly?

What causes eclipses? check all that apply. earth's rotation on its axis moon's shadow covering the sun earth's shadow covering the moon earth's orbit and moon's orbit occasionally aligning the moon and sun's gravity pulling in the same direction