Problem: OPTIONS:
- life
- food
- fuel
- energy
Q: Q: What is never lost and just changes forms? A:
Answer: energy

Problem:OPTIONS:
- dying
- eating
- sleeping
- learning

Q: Making associations between experiences is often a part of what activity? A:
****
A: learning

Q: What use enzymes to break down foreign matter and dead cells? A:
OPTIONS:
- lipids
- hormones
- lymphocytes
- lysosomes
lysosomes

Q: What is the upward force exerted by fluids when any object, such as a boat, is placed in it? A:
OPTIONS:
- human force
- atomic force
- impetuous force
- bouyant force

Answer: bouyant force

Question: Q: Atoms that have gained electrons and become negatively charged are called what? A:
OPTIONS:
- negative atoms
- cations
- anions
- negative ions
Answer: negative ions

input: OPTIONS:
- Pregnant
- fetus
- hypothesis
- homeostasis Now, answer this question: Q: What is the term for a system maintaining a stable internal environment in a changeable external environment? A:
A:
output:
homeostasis