Question: Choose your answer.

What is the main source of energy for the water cycle?

OPTIONS:
- the Sun
- fossil fuels
- clouds
- the ocean
My Answer: the Sun

Question: Choose your answer.

The change from day to night on Earth can be explained by

OPTIONS:
- the movement of the Sun.
- the rotation of Earth.
- the movement of the Moon.
- the tilt of Earth.
My Answer: the rotation of Earth.

Question: Choose your answer.

John has diabetes. Which of the following should he be careful about eating or drinking?

OPTIONS:
- beef
- eggs
- milk
- fruit juice
My Answer: fruit juice

Question: Choose your answer.

When the pesticide DDT was first used, it killed nearly every mosquito it touched. Within a few years, however, many mosquitoes became resistant to DDT and survived. What enabled this to happen?

OPTIONS:
- meiosis
- migration
- immune responses
- gene mutations
My Answer:
gene mutations