Question: Choose your answer.

Wind can cause erosion that changes the surface of the Earth. Wind erosion can have negative effects on the environment by removing soil and polluting the air during dust storms. Which of the following land forms are created by wind erosion?

OPTIONS:
- arches and faults
- sand dunes and arches
- meanders and moraines
- moraines and sand dunes
My Answer: sand dunes and arches

Question: Choose your answer.

The population of which of the following 26 organisms would most likely decline if small animals like rats, rabbits, and snakes were eliminated from an ecosystem?

OPTIONS:
- earthworms
- grasses
- hawks
- mushrooms
My Answer: hawks

Question: Choose your answer.

One thing that all human cells have in common is that they

OPTIONS:
- control the brain.
- make food.
- move blood.
- take in energy.
My Answer: take in energy.

Question: Choose your answer.

There are several different types of rock. Each type of rock is formed under different conditions. How are sedimentary rocks, such as shale and sandstone, formed?

OPTIONS:
- Particles are heated by the Sun.
- Particles are melted together by magma.
- Particles are compressed into layers.
- Particles are changed into liquids.
My Answer:
Particles are compressed into layers.