input with options: Q: The motion of stars in galaxies imply that there is about 10 times as much what as in the luminous objects we can see? A:
OPTIONS:
- density
- heat
- light
- mass
output: mass

input with options: Q: Some microorganisms can digest cellulose, breaking it down into what? A:
OPTIONS:
- gluclose polymers
- fructose polymers
- fructose monomers
- glucose monomers
output: glucose monomers

input with options: Q: Interactions between plants and other organisms result in cycling of chemical nutrients within what? A:
OPTIONS:
- habitat
- air
- water
- ecosystem
output: ecosystem

input with options: Q: Metamorphic rocks form when an existing rock is changed by heat or what? A:
OPTIONS:
- radiation
- chemical reaction
- cold
- pressure
output:
pressure