Answer: Definition
Explanation: In science, the word 'theory' refers to the way in which people interpret facts. A scientific theory is the framework for observations and facts. Theories may change, the way in which they are interpreted may change, but the facts remain the same.
Leonardo da Vinci painted the Mona Lisa
Density tells you the mass of exactly one unit of volume any given substance.
The answer is C. 13.6
Cells need to reproduce for growth, repair, or replacements. Cells divide whenever a tissue / organ / organism is growing or needs repair.
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I agree: a capped soda bottle has very limited contact with the surroundings, as it has to be relatively closed so that the gas bubbles don't escape.
The remaining options have contact either with air (A and D) or with water from the outside (B)
