Problem:

Fact 1: Most ecosystems get energy from sunlight.  Fact 2: Sunlight is a form of electromagnetic energy.  Given the two facts above, what gets most energy from electromagnetic energy?
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A: ecosystems


Problem:

Fact 1: Chemical bonds form when substances react with one another.  Fact 2: All substances are composed of molecules.  Given the two facts above, what forms when molecules react with one another?
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A: chemical bonds


Problem:

Fact 1: An animal requires warmth for survival.  Fact 2: Heat is produced to maintain warmth in the boy.  Given the two facts above, an animal requires what by the body for survival?
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A: heat produced


Problem:

Fact 1: Fish have a circulatory system with a two-chambered heart.  Fact 2: Birds also have four-chambered hearts.  Given the two facts above, what aspect is different for Bird and fish hearts?
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A:
circulatory systems