Which one of these uses wind?
kites
basketballs
tires
balloons
What is dry ice? It is frozen...
nitrogen
carbon dioxide
oxygen
water
Which source of pollution produces the most smoke and soot?
power stations
vehicles
Which pollutant is produced by vehicles but not by power stations?
carbon monoxide
lead
sulphur dioxide
smoke and soot
What is another use of nitrogen?
fertilizer
glue
soap
food
Which of these things need oxygen?
fertilizer
plants
ice
fire
Which one of these uses helium?
basketballs
tires
balloons
hot air balloons
Which source of pollution produces the most carbon monoxide?
vehicles
carbon monoxide
Which one of these uses wind?
tires
basketballs
wind turbines
hot air baloons
Which source of pollution produces the most sulfur dioxide?
vehicles
power stations
What type of gas is lighter than air?
nitrogen
helium
carbon dioxide
oxygen
The main cause of air pollution is...?
fumes from vehicles
bird poop
trash
oil spills
What makes soda bubbly?
carbon dioxide
nitrogen
helium
oxygen