Q: What happens when water flows over a rock for a long period of time?

OPTIONS:
- erosion
- flooding
- breakage
- evaporation
A: erosion
Q: Which is an example of a chemical reaction?

OPTIONS:
- nails rusting
- glass melting
- sugar dissolving
- alcohol vaporizing
A: nails rusting
Q: The Mariana Trench is the deepest ocean trench on Earth. This trench occurs at a plate boundary where

OPTIONS:
- one plate is sliding past another.
- one plate is being forced beneath another.
- two plates are colliding into each other.
- two plates are pulling apart from each other.
A: one plate is being forced beneath another.
Q: What is determined by the speed that Earth rotates on its axis?

OPTIONS:
- the length of a day
- the energy that reaches a location
- the temperature of water in the ocean
- the number of seasons in a year
A:
the length of a day