Q: What process typically occurs to metal exposed to outside elements? A:

OPTIONS:
- shrinkage
- extraction
- explosion
- corrosion

Answer: corrosion

Problem: OPTIONS:
- winds
- fossils
- tides
- waves
Q: Q: What do wavelengths measure the size of? A:
Answer: waves

Problem:OPTIONS:
- constantly electron charge
- lean electron charge
- same electron charge
- opposite electron charge

Q: When a balloon is rubbed against hair, why do they attract each other? A:
****
A: opposite electron charge

Q: Weather maps show storms, air masses, and what? A:
OPTIONS:
- currents
- patterns
- regions
- fronts
fronts

Q: When both objects have a positive charge what will the force be between them? A:
OPTIONS:
- attractive
- expressive
- polar
- repulsive

Answer: repulsive

input with options: Q: What type of species have a large effect on the balance of organisms in an ecosystem? A:
OPTIONS:
- decomposers
- producers
- secondary consumers
- keystone
output:
keystone