Grade 7 Exam Review - Human Impacts on the Water Cycle

Deforestation is when humans

• remove large areas of woodlands

• plant large areas of woodlands

• selectivly choose which trees to cut

• leave all areas of the forest alone

One big reason deforestation is awful for the planet is...

• less evapotranspiration, which means less rain

• more evapotranspiration, which means more rain

Acid rain is...

• rain that is contaminated with pollution

• rain that is pure

• rain that is contaminated with oxygen

• rain that is contaminated with dead fish

Tailing is the...

• ore we harvest to create oil and gas

• chemical residue that is left over after we harvest ore

Oil spills are most dangerous to...

• humans

• water wildlife

• forest wildlife

• aerial wildlife

Hydroelectricity uses ...... to create power

• water

• air

• wind

• oil

In which ways does hydroelectricty NOT impact the environment?

• It changes the temperature of the water around it

• It can impact fish migration

• It can have resivoirs that cover agricultural land

• It can release steam that hurts birds flying overhead

What is NOT an environmental effect felt by the icecaps melting?

• less arctic homes for arctic animals

• more water in the ocean/higher sea level

• impacts on the water cycle

• Changes the amount of air in the atmosphere

Motor vehicles can create

• Smog

• Fog

• Water

• Dirt

Eutrophication does not do the following...

• cut off the oxygene to the water

• can create undrinkable water

• create new habitat for animals

• create a green film on water