What occurs when air is forced into a smaller space? 

• compression
• force
• expansion
• weight

What occurs when air particles spread out because of less pressure?

• force 
• expansion
• compression
• weight

When particles are compressed, they move how?

• slower
• no change
• faster

What do we call the prediction of what the weather will be?

• inference
• guess
• forecast
• prediction

What is the measure of the amount of matter? 

• gravity
• mass
• force
• weight

What do we call anything that takes up space and has weight?

• atoms
• mass
• gravity
• matter

Who is the person that studies the causes of weather and tries to make predictions? 

• meteorologist
• weatherologist
• precipologist
• deanerologist

What is the study of the Earth's lower atmosphere where weather occurs?

• deanerology
• meteorology
• weatherology
• precipology

What are the two most prevalent gases in our atmosphere?

• oxygen and carbon dioxide
• carbon dioxide and nitrogen
• nitrogen and oxygen
• ozone and oxygen

Matter is made up of what?

• pieces
• dust
• particles
• cells