How do worms help plants grow?
A) They are a source of minerals.
B) They carry out chemical reactions that convert carbon dioxide to nitrogen.
C) They decompose organic material into compounds plants can use.
D) They add excrement, a source of nutrients, plus they produce air space by crawling through the soil.
Correct Answer:
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Q39: Rainwater can cause chemical weathering by
A)freezing into
Q40: What is the ingredient found in topsoil
Q41: What geological process created the Grand Canyon?
A)wave
Q42: A wave moves from the open ocean
Q43: Why do most caves form in limestone
Q45: Describe how a glacier is like a
Q46: How do water molecules below the ocean
Q47: How do ocean waves chemically weather rock?
A)by
Q48: What role do fungi play in the
Q49: Where does chemical weathering occur fastest?
A)Sahara Desert
B)Antarctic
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