Which one of these uses helium?
balloons
hot air balloons
basketballs
tires
What is another use of nitrogen?
soap
glue
food
fertilizer
Which of these things need oxygen?
ice
fire
plants
fertilizer
What is dry ice? It is frozen...
water
oxygen
nitrogen
carbon dioxide
What makes soda bubbly?
nitrogen
oxygen
helium
carbon dioxide
What type of gas is lighter than air?
oxygen
helium
nitrogen
carbon dioxide
