Problem:OPTIONS:
- astronomy
- climatology
- geology
- chemistry

Q: What is the study of the interaction between matter and energy called? A:
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A: chemistry

Problem:OPTIONS:
- bond
- structure
- solute
- mixture

Q: What describes a combination of two or more substances, each of which maintains its own chemical identity? A:
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A: mixture

Problem:OPTIONS:
- solvent law
- fractional mass
- volatile crystallization
- fractional crystallization

Q: What is the separation of compounds on the basis of their solubilities in a given solvent? A:
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A: fractional crystallization

Problem:OPTIONS:
- nutrients
- muscles
- blood cells
- tissues

Q: In multicellular organisms, specialized cells may be organized into what, which in turn may be organized into organs? A:
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A:
tissues