input: OPTIONS:
- gas
- lava
- silicon
- liquid Now, answer this question: Q: Seismic waves show that the inner core of the earth is solid while the outer core is what? A:
A:
output: liquid

Q: Gases on earth originated from comets and what events? A:

OPTIONS:
- supernovas
- black holes
- tides
- volcanic eruptions

Answer: volcanic eruptions

Problem: OPTIONS:
- velocities
- thermals
- amperes
- joules
Q: Q: In what unit is heat measured in? A:
Answer: joules

Problem:OPTIONS:
- graphite
- hydrogen
- oxygen
- carbon

Q: Although they differ vastly in hardness, pencil lead and diamonds both contain what element? A:
****
A: carbon

Q: What is the hardest of all minerals? A:
OPTIONS:
- titanium
- gold
- platinum
- diamonds
diamonds

Q: Saturn is made mostly of helium and what else? A:
OPTIONS:
- nitrogen
- carbon
- hydrogen
- hydrogen

Answer:
hydrogen