NATURAL RESOURCES

About ______________ of the Earth's surface is water-covered, and the oceans hold about __________ of all Earth's water.

• 70 percent , 95.6 percent

• 71.5 percent, 96 percent

• 71 percent , 96.5 percent

• 70 percent, 95 percent

3% of Earth’s water is fresh (not salty). But over two-thirds of this is not available. It’s frozen into ice sheets and glaciers.

• TRUE

• FALSE

Less than 1% of Earth’s water is fresh water we can use. But most of thus is below ground, as groundwater.

• TRUE

• FALSE

Which of the following is not included in the 11% total use of fresh water?

• drinking

• cooking

• flushing the toilet

• factory use

It refers to the removal of salts and minerals from a target substance (water)

It is the physical, chemical and biological decline in soil quality.

• Soil degradation

• Soil Desertification

• Soil erosion

______________ is a naturally occurring process that affects all landforms. In agriculture, ____________ refers to the wearing away of a field's topsoil by the natural physical forces of water.

• Soil Degradation

• Soil Desertification

• Soil Erosion

______________________is a type of land degradation in which a relatively dry land region becomes increasingly arid, typically losing its bodies of water as well as vegetation and wildlife. It is caused by a variety of factors, such as climate change and human activities.

• Soil Degredation

• Soil erosion

• Soil Desertification

a natural fuel such as coal or gas, formed in the geological past from the remains of living organisms.

Oil forms from tiny ocean creatures. They die, and get buried in sediment. This becomes sedimentary rock. Inside the rock, heat and pressure turn their remains into oil.

• True

• False