Ques:Q: What is the process in which a liquid changes to a solid? Choices: - condensation - boiling - melting - freezing A:

Ans:freezing
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Ques:Q: In the lungs, oxygen diffuses out of the alveoli and into where? Choices: - blood - neurons - cillia - capillaries A:

Ans:capillaries
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Ques:Q: The stability of an ecosystem depends on the actions of what, exemplified by mushrooms on a decaying log and bacteria in soil? Choices: - whitefly - fluxes - aphids - decomposers A:

Ans:decomposers
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Ques:Q: Irrigation can waste a lot of what natural resource? Choices: - habitat - money - fertilizer - water A:

Ans:
water
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