Earthquake waves are recorded by seismograph machines. What does an earthquake wave transmit?
OPTIONS:
- energy
- light
- particles
- speed

energy

If wolves prey on deer for food, what will most likely happen to the deer population if wolves are removed from an area where deer live?
OPTIONS:
- The population of deer will increase.
- The population of deer will decrease.
- The population of deer will remain the same.
- The population of deer will become extinct.

The population of deer will increase.

Many scientists think that burning fossil fuels has increased the amount of carbon dioxide in the atmosphere. What effect would the increase of carbon dioxide most likely have on the planet?
OPTIONS:
- a cooler climate
- a warmer climate
- lower relative humidity
- more ozone in the atmosphere
a warmer climate