input with options: Q: Friction causes the molecules on rubbing surfaces to move faster, which produces what?   A:
OPTIONS:
- life
- precipitation
- cold
- heat
output: heat
Q: Q: What is the name of an uncharged particle whose weight is nearly equal to that of a proton?   A:

OPTIONS:
- a nuclei
- proton
- electron
- a neutron

A: a neutron
input: OPTIONS:
- mantle soil
- the hot regenerate
- molten lava
- the hot core Now, answer this question: Q: What warms the base of the mantle creating convection currents there?   A:
A:
output: the hot core
Q: Vertebrates with four limbs are also called what?   A:

OPTIONS:
- Amphibians
- Birds
- Mammals
- tetrapods

Answer: tetrapods
Problem: OPTIONS:
- dyes
- creams
- malts
- soaps
Q: Q: What are the salts of fatty acids called?   A:
Answer: soaps
Q: Which gases trap heat in the atmosphere?   A:

OPTIONS:
- fluorine and nitrogen
- methane and helium
- ozone
- greenhouse

Answer:
greenhouse