Human Impact on Water

7th Grade- Human impact (Water edition) Part 2

How we impact the water cycle

Multiple Choice

what does the #4 show in the diagram?

• condensation
• evaporation
• precipitation
• run off

Multiple Choice

Rain and snow are two different forms of precipitation that fall on Earth's surface. Which factor is responsible for there being different forms of precipitation?

• Evaporation

• Run-off

• Temperature

• Transpiration

Multiple Choice

During which stage do clouds form?

• condensation
• evaporation
• precipitation

Multiple Choice

Which stages does liquid water from the ocean turn into water vapor?

• condesantion
• evaporation
• precipitation
• run off

Multiple Choice

In which area would the rate of evaporation be the lowest?

• Over the ocean

• Over the mountains

• Over the rainforest

• Over the desert

Multiple Choice

What is it called when plants give off water vapor as a waste product?

• condensation
• evaporation
• sublimation
• transpiration

Multiple Choice

The image shows various stages in the water cycle. During which stage does water flow back towards the sea as runoff?

• W

• X

• Y

• Z

Multiple Choice

Which best explains why runoff is important?

• It returns water to other locations on Earth
• It increases the chance of flooding
• It makes evaporation occur faster
• It increases condensation

Multiple Choice

What phase is #6

• Evaporation

• Precipitation

• runoff

• infiltration

Multiple Choice

Warm, less dense air (including vapor) rises in the atmosphere. Cool, more dense air (including vapor) sinks. This transfer is . . . .

• convection
• conduction
• radiation
• gravity

Open Ended

Explain how you think deforestation affects the water cycle

Deforestation

• Removal of trees from an area

• Loss of trees -> less transpiration -> less water vapor -> less precipitation -> warmer, drier climate

• Loss of trees -> less plant cover -> more erosion of soil and more run off -> increase amount of dissolved solids in water

Multiple Choice

What is deforestation?

• Clearing Earth's forests on a massive scale
• Eating too much vegetables
• Going to a forest and pulling weeds
• Clearing the five trees in my backyard

Multiple Choice

How does deforestation affect rainfall?

• Increase rainfall

• decreases rainfall

• does not affect rainfall

• causes rain to turn purple

Multiple Select

How do trees reduce water runoff and erosion?

• Trees roots hold soil in place soil in place which

• Tree canopy (leaves) slows down and scatters rain drops

• Trees create thick layers of leaves that act like a sponge to hold water

• Trees cause water runoff to slow down and soak into the ground

Multiple Choice

Process of land turning into desert due to deforestation and drought

• deforestation

• desertification

• industry

• drought

Open Ended

Explain how you think agriculture impacts the water cycle

Agriculture

• Reduces water flow in rivers when water is redirected water to fields

• Can increases soil, bacteria, and nutrients in runoff which impacts local water bodies

• Fertilizer in runoff -> eutrophication -> algae blooms -> less disolved oxygen -> most life in water dies

Multiple Choice

How does agriculture affect the quality of the surface water?

• Fertilizers are always good for plants and will not harm the water.

• It makes the water saltier

• It cleans the water from bacteria and viruses

• Fertilizers from farm runoff can cause algal blooms (rapid water plant growth) and affect the aquatic ecosystem.

Multiple Select

What are the impacts of having less water in river?

• Less habitat for plants and animals

• Increase temperature in summertime

• Higher turbidity levels

Open Ended

Explain how you think urbanization impacts the water cycle

Urbanization 

• Urbanization = More pavement and rooftops = less infiltration

• less infiltration > more runoff -> more nonpoint source pollution

• less infiltration -> less groundwater -> less water in dry season

Multiple Choice

Gabriella and her family have recently moved onto a plot of land that previously had no human activity. What will most likely be the change to the water in that area?

• Water will be more evenly distributed in the area.

• Most of the freshwater in the area will become salty.

• The amount of available freshwater will increase.

• There will be less water available for other living things.

Multiple Choice

Gabriella and her family have recently moved onto a plot of land that previously had no human activity. What will most likely be the change to the water in that area?

• Water will be more evenly distributed in the area.

• Most of the freshwater in the area will become salty.

• The amount of available freshwater will increase.

• There will be less water available for other living things.

Multiple Select

How can the use of fertilizers to improve lawns and gardens negatively impact the environment?

• it can be carried into local water supplies

• it can cause mutations in plants

• it can cause atmospheric pollution

• it cannot be absorbed by roots

Multiple Choice

Over the years, a farm area becomes more populated. Which of the following will most likely happen in the town as a result of this urbanization?

• amount of rainfall will increase

• rivers may be contaminated by sewage

• Light pollution in the town may decrease

• people will develop more farms in the town

Human Impacts Review

Review what we have learned so far in this unit

Multiple Choice

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

• Point-Source Pollution

• Non-Point Source Pollution

• Thermal Pollution

Multiple Choice

After a car accident firefighters always clean up oil and fuel spills. What are they trying to prevent?

• Contaminants from entering ponds and lakes through runoff water

• Animals drinking the fuel and oil

• People stealing the fuel

Multiple Choice

What would be the best definition for the word watershed?

• Only the river

• The clouds and the mountains

• A defined area which catches water and guides it into a river that will then take it into a large body of water.

• The precipitation from the clouds during the water cycle

Multiple Choice

If water is _______________, it is suited for drinking.

• potable

• reservoir

• surface water

• groundwater

Multiple Choice

Why does groundwater usually require less treatment than surface water?

• The layers of Earth protect groundwater from pollutants.

• As groundwater sinks into the ground, the layers of rock act like a natural filter and remove pollutants from the water.

• Surface water has more exposure to pollutants in runoff and the atmosphere.

• all of the above

Multiple Choice

An example of a non-point solution is 

• waste water from leaking pipe
• fertilizer runoff from lawns

Multiple Choice

Which describes a nonpoint source of pollution?

• runoff from a road into a nearby stream
• liquid fertilizer flowing

Multiple Choice

A body of water that has high turbidity is ...

• cloudy

• clear

Multiple Select

Which of the following are types of freshwater that can be used by people?

Select all that are true.

• groundwater

• ice caps and glaciers

• oceans

• rivers

• lakes

Multiple Choice

Colder water.....

• hold MORE dissolved oxygen

• holds LESS dissolved oxygen

Multiple Choice

Release of heat into the water that affects the temperature and ecosystem is an example of what

• Thermal pollution

• Chemical Pollution

• Biological Pollution

Multiple Choice

In the past few years, a town has built roads, houses and lost natural resources. What happened?

• Land pollution.

• Nutrient pollution.

• Desertification.

• Urban sprawl.

Multiple Choice

Human activity that damages the land so that it can no longer support ecosystems is

• decapitated land.

• land degradation.

• land decomposition.

• agricultural land.

Multiple Choice

What is nonrenewable energy?

• when a battery is dead because of not being charged.

• a natural resource, such as oil, coal, and natural gas.

• gold, silver and heavy metals used in construction.

• a man made resource that is easily replenishable.

Multiple Choice

The measure of how clean or polluted water is refers to

• water quality

• water supply

• thermal pollution

• water pollution

Multiple Choice

A resource that forms at a rate that is much slower than the rate at which the resource is consumed is a(n)

• nonrenewable resource

• renewable resource

• point-source

• non-point source

Multiple Choice

A body of rock or sediment below the surface that can store a lot of water, and that allows water to flow easily through it is called a(n)

• permafrost

• aquifer

• urbanization

• eutrophication

Multiple Choice

_______________ is a permanently frozen layer of soil beneath the surface of the ground.

• eutrophication

• permafrost

• aquifer

• urbanization