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Humans & Enviroment

Earth Science

What is a natural resource? A natural resource is a material that is found in nature that is essential or useful to people.
How many pounds of gravel, stone, and sand do miners remove from the Earth? Miners remove 17,600 pounds of gravel, stone, and sand.
What are gravel, stone, and sand used for? These materials are used to pave roads, make cement and build houses.
How much oil does the United States use per year and per person? The United States uses 1100 gallons of oil per person per year.
How much aluminum does each person in the United States use each year? Each person uses 55 pounds each year.
How many mines are there in the United States? There are about 500,000 mines in the United States.
What do forests provide? Forests provide lumber and paper products.
What two places do lumber come from? Natural forest ecosystems and forests plantations.
How much water do people in cities use? People use 40-100 gallons.
What can water also be? Water can also ne an energy resource.
What is the effect of water rushing through hydroelectric dams? Water rushing through hydroelectric dams generates electricity.
What country uses the most water than any country per person? The United States uses the most water than any other country.
How many pounds of iron and steel do people use? People use 1100 pounds of iron and steel.
Created by: mjys02