Land Use
Air & Health
Soil
Water Resources
Water Pollution
100

This is the use of land to produce food.

What is agriculture?

100

This radioactive gas can cause lung cancer.

What is radon?

100

This is the top layer of soil made of dead leaves and grass.

What is litter?

100

This percent of Earth’s water is undrinkable.

What is 97%?

100

This type of pollution comes from farms, factories, and sewage.

What is water pollution?

200

This is the removal of forests for other uses.

What is deforestation?

200

This gas forms when fuels are burned and can be deadly.

What is carbon monoxide?

200

This layer contains nutrients, water, and air.

What is topsoil?

200

Less than this percent of water is drinkable.

What is 1%?

200

This type of pollution involves heated water harming organisms.

What is thermal pollution?

300

This type of mining removes the top layer of soil.

What is strip mining?

300

This layer protects Earth from UV radiation.

What is the ozone layer?

300

This is the movement of soil by wind, water, or ice.

What is erosion?

300

This means there is not enough water to meet demand.

What is water scarcity?

300

This is when algae growth removes oxygen from water.

What is an oxygen depletion (or dead zone)?

400

This is the process of burying waste in the ground.

What is a landfill?

400

These chemicals caused the ozone hole.

What are CFCs?

400

This happens when soil loses nutrients from repeated planting.

What is nutrient depletion?

400

Water is considered this type of resource.

What is renewable?

400

Oil spills harm animals by doing this to their bodies.

What is coating feathers/fur and poisoning them?

500

This method cuts down all trees in an area at once.

What is clear-cutting?

500

This type of radiation is blocked by the ozone layer.

What is ultraviolet (UV) radiation?

500

This is when fertile land turns into desert.

What is desertification?

500

This is the movement of water through Earth’s systems.

What is the water cycle?

500

This happens when water has too little oxygen for life.

What is an ocean dead zone?