input: OPTIONS:
- disease
- mutation
- increased growth rate
- negative growth rate Now, answer this question: Q: What results when birth rates fall even lower than death rates? A:
A:
output: negative growth rate

Q: Rust consists of oxides of what element? A:

OPTIONS:
- Copper
- Gold
- Aluminum
- iron

Answer: iron

Problem: OPTIONS:
- false
- just
- predestined
- true
Q: Q: When a predator kills and eats its prey, what sort of predation is this referred to as? A:
Answer: true

Problem:OPTIONS:
- magnetic force
- cooling force
- power force
- electric force

Q: The force of attraction or repulsion between charged particles is called what? A:
****
A: electric force

Q: The three classes of elements are metals, nonmetals, and what? A:
OPTIONS:
- ionic compounds
- molecules
- atoms
- metalloids
metalloids

Q: Mass can be destroyed to release what? A:
OPTIONS:
- acceleration
- mass
- velocity
- energy

Answer:
energy