input: OPTIONS:
- graphite
- hydrogen
- oxygen
- carbon Now, answer this question: Q: Although they differ vastly in hardness, pencil lead and diamonds both contain what element? A:
A:
output: carbon

Q: What allows theories to be widely accepted? A:

OPTIONS:
- hypothesis
- observation
- theory
- evidence

Answer: evidence

Problem: OPTIONS:
- ultraviolet light
- apparent light
- infrared light
- visible light
Q: Q: What are the light wavelengths that the human eye can detect called? A:
Answer: visible light

Problem:OPTIONS:
- metabolism
- secretion
- expulsion
- respiration

Q: What is the exchange of gases between the body and outside air? A:
****
A: respiration

Q: When matter recycles and changes state what does it gain or lose by doing so? A:
OPTIONS:
- density
- volume
- fuel
- energy
energy

Q: What natural destructive element cuts away at rock forming river valleys? A:
OPTIONS:
- sediment
- lava
- air
- water

Answer:
water