Question: Choose your answer.

Scientists dig in a dry area at the bottom of a mountain range. Fossilized shells of freshwater mussels are found in the area. Which is a likely conclusion that scientists will draw based on this evidence?

OPTIONS:
- Rivers once flowed through the area.
- Volcanoes were once active in the area.
- The ocean shoreline once reached this area.
- Floods were a common occurrence in this area.
My Answer: Rivers once flowed through the area.

Question: Choose your answer.

Which process directly adds carbon into the atmosphere?

OPTIONS:
- increasing plant populations
- decreasing animal populations
- burning fossil fuels
- forming sedimentary rock
My Answer: burning fossil fuels

Question: Choose your answer.

Which is an example of kinetic energy?

OPTIONS:
- a book sitting on a shelf
- a ball rolling down a hill
- a runner about to start a race
- a window getting hot from the sun
My Answer: a ball rolling down a hill

Question: Choose your answer.

Which of these can be described as a system of stars, gases, dust, and other matter that orbits a common center of gravity?

OPTIONS:
- an asteroid
- a galaxy
- a nebula
- a comet
My Answer:
a galaxy