7th Science- Human Impacts (Water Edition)

7th Science- Human Impacts (Water Edition)

Multiple Select

Why is water important?

• Water shapes Earth's surface

• Water is vital for life

• Water affects and drives Earth's climate and weather.

Multiple Choice

How much of Earth's water is available for drinking?

• 5%

• 1%

• 0.3%

• 2%

Where we get fresh water

• Aquifers- a body of rock or sediment that can carry a lot of water and allows water to flow

• Permafrost- layer of water that is frozen in the soil in polar regions

• Fresh surface waters- Includes rivers, streams, and lakes

Multiple Choice

What is the type of water that moves underground?

• surface water
• water table
• groundwater
• watershed

Water Quality

• Water quality- measure of how clean or polluted water is.

• Water quality is measured by using: Dissolved Solids, pH, Dissolved Oxygen, Turbidity, and Microbial load

• Potable water- Water that is suitable to drink

Multiple Choice

What is water quality?

• It describes the condition of the water

• It is the continuous movement of water on, above, and below the surface of the Earth

• It is the property of containing salt

• It is the total amount of suspended solids.

Multiple Choice

What is dissolved oxygen?

• The property of containing salt

• The amount of suspended solids

• The measure of the amount of oxygen that is dissolved

• Describes how acidic or basic water is

Multiple Choice

What is pH?

• The property of containing salt

• The measure of the amount of oxygen that is dissolved in water

• The amount of suspended solids in water

• The measurement of the acidity or basicity of water

Water Pollution

• Two types: Point-source pollution ( from one site) and Nonpoint-source pollution (from many sources)

• Thermal Pollution- heating of water that results from human activity

• Eutrophication- Increase in amount of nutrients in water

Multiple Choice

An example of point source pollution is

• trash floating in the ocean
• oil spilling from a supertanker

Multiple Choice

An example of a non-point solution is 

• waste water from leaking pipe
• fertilizer runoff from lawns

Multiple Choice

What type of pollution comes from multiple sources?

• point source pollution

• thermal pollution

• nonpoint source

• eutrophixation

Multiple Select

The terms deforestation, urbanization, desertification, and erosion are ways humans negatively impact the Earth. Which statement below best identifies the relationship between these terms?

• Both deforestation and urbanization can lead to desertification and erosion.

• Both erosion and desertification can lead to deforestation and urbanization.

• Both urbanization and erosion can lead to deforestation and desertification.

• Both deforestation and erosion can lead to urbanization and desertification.

Multiple Choice

What is global warming

• the normal temperature fluctuations of Earth's climate cycle

• the melting of the polar ice caps

• the trend of increasing temperatures on Earth

• the changes in Earth's biosphere that affect the atmosphere