*Question*
Q: Which layer of the earth is molten? Choices: - the inner core - the metallic core - the mantle - the outer core A:
**Answer**
the outer core

*Question*
Q: Lysosomes have what type of enzymes that break down old molecules into parts that can be recycled? Choices: - corrosive - bacterial - probiotics - digestive A:
**Answer**
digestive

*Question*
Q: Objects in motion that return to the same position after a fixed period of time are said to be in what? Choices: - resonant motion - kinetic motion - homeostasis - harmonic motion A:
**Answer**
harmonic motion

*Question*
Q: In an environment, symbiosis, competition, and relying on other organisms for food are examples of what? Choices: - collaboration - commensalism - adaptation - interaction A:
**Answer**
interaction