Which of the following demonstrates an organ providing a force? A. The eye transmits information to the brain.

B. The heart contracts and expands to move blood.

C. The kidney filters waste from blood.

D. The skin protects other organs from damage.

How does a scientist the government? a. the scientist tells people in society what to do. b. the scientist determines the policies that the government spends money on. c. the scientist provides unbiased information to the government. d. the scientist makes laws based on his or her research results.

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.