Environmental Science

Salmon populations have been severely reduced by what?

• fisheing

• dams

• habitat reduction

• all of these

The greatest threat to fish populations is from what?

• predator fish

• humans

• nature

• global warming

What option shows an example of a renewable and nonrenewable natural resources?

• trees and solar energy

• plants and oxygen

• water and natural gas

What is sustainable development?

• Focusing only on current generation

• Meeting present needs without harming future needs

• Development without future concerns

• Using resources rapidly

A substance that pollutes something, especially water or the atmosphere is called

• dirt

• pollutant

• oxygen

• precipitant

Choose the correct definition and example of a fossil fuel.

• a rock rich in minerals that can be removed from Earth. Ex. metal

• cell that changes energy from the Sun into electrical energy. Ex. solar panels

• items made from organisms that lived long ago. Ex. coal

Sand dunes form along some coastlines. Which factor is most responsible for forming sand dunes?

• rain

• wind

• water

• ice

What is the source of energy for the water cycle?

• gravity

• transpiration

• the oceans

• the sun

Based on the graph, which country releases the most Greenhouse Gases?

• Russia

• Brazil

• China

• U.S.

What are the biotic factors in this image?

• sunlight, elephants, and grasses

• sunlight, water,  and air

• elephants, plants, trees 

• Don't know