Problem: OPTIONS:
- actuators
- tentacles
- saliva
- exoskeletons
Q: Q: What do corals secrete that builds up to become a coral reef? A:
Answer: exoskeletons

Problem:OPTIONS:
- electricity
- inertia
- momentum
- gravity

Q: What is the force of attraction between two masses? A:
****
A: gravity

Q: The amount of energy needed to raise the temperature of one gram of liquid water by 1c is also known as? A:
OPTIONS:
- mass
- calorie
- Kelvin
- specific heat
specific heat

Q: What is the study of the relationship between electricity and chemical reactions called? A:
OPTIONS:
- inorganic chemistry
- analytical chemistry
- physical chemistry
- electrochemistry

Answer: electrochemistry

Question: Q: Alchemists, as early as the eighth century, knew nitric acid as aqua fortis, which means? A:
OPTIONS:
- isolated water
- clean water
- applied water
- strong water
Answer: strong water

input: OPTIONS:
- enthalpy
- vibration
- volume
- entropy Now, answer this question: Q: Chemical and physical changes in a system may be accompanied by an increase or a decrease in the disorder of the system, corresponding to an increase or decrease in what? A:
A:
output:
entropy