Question: Choose your answer.

Based on the evidence available at the time, early models of the solar system stated that all objects in space orbited Earth. In the 16th century, an astronomer reevaluated the evidence and proposed a model of the solar system that is still in use. What part of this model corrected the mistake in previous solar system models?

OPTIONS:
- The Sun is at the center of this model.
- Earth is the largest object in this model.
- This model contains more than one star.
- This model shows that Earth is stationary.
My Answer: The Sun is at the center of this model.

Question: Choose your answer.

An example of a learned behavior is a

OPTIONS:
- spider building a web.
- dog laying down on command.
- beaver building a dam in a creek.
- kangaroo jumping away from a predator.
My Answer: dog laying down on command.

Question: Choose your answer.

Which cells help to destroy pathogens such as bacteria that enter the human body?

OPTIONS:
- red blood cells
- liver cells
- white blood cells
- brain cells
My Answer: white blood cells

Question: Choose your answer.

What happens to water molecules during the boiling process?

OPTIONS:
- They move faster and move farther apart as they absorb heat.
- They move faster and remain close together as they absorb heat.
- They move more slowly but move farther apart as they lose heat.
- They move faster and move farther apart as they lose heat.
My Answer:
They move faster and move farther apart as they absorb heat.