Pollution

The water and human wastes that are washed down sinks, showers, and toilets are called __________________.

• the water cycle
• sewage
• thermal pollution
• point pollution sources

Most water pollution is the result of __________________.

• natural processes
• animal waste
• human activities
• acid rain

Tags

NGSS.MS-ESS3-4

These wastes include animal wastes, fertilizers, and pesticides, flow into bodies of water, causing algae to grow.

• household sewage
• industrial waste
• municipal waste
• agricultural waste

Wastes produced by agriculture, households, industry, mining, and other human activities can end up in ______________.

• groundwater
• streams and rivers
• oceans
• All of these choices

About 97% of the water on Earth is ___________________.

• fresh water
• groundwater
• salt water
• ice

most of the fresh water on Earth is in

• oceans
• ice
• groundwater
• aquifers

Earth's freshwater is renewable, we obtain new fresh water from _____

• water treatment plants
• aquifers
• water cycle
• photosynthesis

Water pollution that comes from many sources is considered...

• point source pollution
• nonpoint source pollution
• thermal pollution
• ocean pollution

What is Pollution?

• Increase in Earths temperatures
• Sudden growth in algae in a pond
• Decrease in oxygen in water
• Harmful substance in environment

___________ is a specific source of pollution that can be identified.

• Point source pollution.
• Nonpoint source pollution.
• Greenhouse gas.
• Oil spill.