Natural resources are

• renewable.
• nonrenewable.
• resources that exist without actions of humankind. 
• resources produced by humans from using biotic and abiotic factors found in nature.

Which of the following is NOT a Natural Resource?

• Coal
• Paper
• Solar
• Wind

Renewable resources 

• can be replenished.
• cannot be replenished.
• are limited.
• are fossil fuels.

Select examples of primary pollutant from the list below.

• carbon dioxide

• nitrogen oxide

• sulfur oxide

• fossil fuels

Chemical reactions involving sunlight, air, car exhaust, and ozone cause which of the following to form?

• primary pollutants

• sick-building syndrome

• smog

• acid rain

Which of the following is NOT a short-term health effect of air pollution?

• lung cancer

• headaches

• eye irritation

• nausea

Soil is made of

• weathered rocks and minerals
• dead plants and animals
• air and water
• all of the above

Soil is formed by the breaking down of rocks by the action of wind, water and climate. This process is called

• Humification

• Weathering

• Soil erosion

• None of the above

What is algal bloom?

• Plants bloom early down stream
• Water becomes cloudy
• Too much of nutrients
• Extremely rapid growth of algea

A farmer is storing the manure from his farm in large piles next to the river. What type of pollution would this cause?

• Toxic
• Bacterial