Human impact on water

Most water pollution is the result of

• human activities.
• drought.
• volcanic eruptions.
• storms.

Tags

NGSS.MS-ESS3-4

Approximately 75 percent of the Earth's surface is covered in water. So why is water considered such a precious resource?

• The greenhouse effect is causing most of the world's freshwater to be trapped in the atmosphere
• Only a small fraction of the Earth's water is freshwater available for drinking and irrigation
• Each year, more freshwater is being trapped in icecaps located at the North and South Poles
• Global warming caused by greenhouse gas emissions will likely cause Earth's oceans to evaporate

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS3-1

About 97% of the water on Earth is ___________________.

• fresh water
• groundwater
• salt water
• ice

Tags

NGSS.MS-ESS2-4

When contaminants are picked up by runoff, the effects can be harmful because the water that living organisms depend on becomes __________.

• polluted

• extinction

• positive

• increase

Tags

NGSS.MS-LS2-4

NGSS.MS-LS1-5

Water is most likely to become contaminated near...

• a forest

• a cattle farm

• a dam

• the bottom of the ocean

Tags

NGSS.MS-LS2-4

NGSS.MS-ESS3-4

Water that flows on the ground's surface instead of absorbing into the ground is called...

• water table

• runoff

• watershed

• aquifer

Tags

NGSS.MS-ESS2-4

The image is an example of what type of pollution. Look at the picture carefully

• Point-Source Pollution

• Non-Point Source Pollution

One measure of water quality is the acidity of the water. Which of these terms describes this measure?

• pH

• Potable

• Turbidity

• Temperature

The best difference between point-source and non-point source pollution is ...

• Point-source come from one site; non-point comes from many sites

• Point-source comes from pipes; non-point comes from cities

Which is most likely to cause groundwater pollution?

• leaking underground storage tank

• deforestation

• too many greenhouse gases in the atmosphere

• not enough solar energy