question below:
As the population of small fish in a lake decreases, the population of large fish that depend on the small fish for food will
OPTIONS:
- reproduce faster
- begin to produce their own food
- decrease in number
- increase in number
answer below:
decrease in number

question below:
Base your answer on the information below and on your knowledge of science. A baseball strikes the roof of a car and dents it. The paint on the roof begins to crack and chip, exposing the metal. The exposed metal on the roof rusts, eventually causing a small hole in the roof. Which event is a chemical change?
OPTIONS:
- The baseball strikes the roof.
- The roof of the car dents.
- The paint cracks and chips.
- The exposed metal rusts.
answer below:
The exposed metal rusts.

question below:
What is the smallest particle of the element gold (Au) that can still be classified as gold?
OPTIONS:
- atom
- molecule
- neutron
- proton
answer below:
atom

question below:
A small, fast-moving river in is in a V-shaped valley on the slope of a mountain. If you follow the river to where it passes through a plain, what will the river most likely look like compared with how it looked on the mountain?
OPTIONS:
- Much the same
- Deeper and faster
- Slower and wider
- Straighter
answer below:
Slower and wider