Unit 3a Lesson 2 TEST: Human Impact on Water Resources

Why is it important to clean, conserve, and protect water?

• Water is expensive.

• Water is a living thing.

• Water can be frozen.

• Water is a limited resource.

About how much of earth's water is freshwater?

• 100%

• 3%

• 10%

• none

Conserving water is important because...

• we have a lot freshwater on Earth

• Water tastes good

• all living things need water

A scientist is studying the effects of burning fossil fuels. One effect is acid rain. She is creating a plan to prevent further acid rain damage to the ecosystem.

What should the scientist include in her plan? Select all that apply.

• Ask people to drive more instead of walking or biking.

• Develop vehicles that burn more gasoline per mile driven.

• Develop vehicles that use renewable energy instead of fossil fuels.

• Encourage people to carpool instead of driving individual vehicles.

• Reduce the amount of public transportation available in the city.

Which of the following is not one of the "three Rs" of conservation?

• recycle

• reduce

• refilter

• reuse

Most gases that lead to acid rain come from ​ (a)   .

• burning fossil fuels
• natural sources

Which will most likely happen if lake water becomes polluted by humans?

• Animals in the lake will die.

• There will be more fish in the lake.

• The pollution will not hurt the plants or animals in the water.

• It will change the soil around the lake into pebbles.

It has been very dry in Miguel's city for the past several months. The local government has placed the city under a drought warning, which means people in the city should try to conserve as much water as possible.

What can Miguel do to help conserve water?

Select all that apply.

• filter water before drinking it

• take short showers instead of baths

• brush his teeth at the same time each day

• turn off the water when he brushes his teeth

• wash his hands using hot water instead of cold water

Victoria went to a stream near her home and recorded these observations. What can you conclude from her observations?

• It is clean.

• It is suitable to drink.

• It is polluted.

• It has lots of fish.

Which of the following is one way humans pollute the hydrosphere?

• fishing

• farming and causing soil runoff

• going on a paddle boat

• cleaning up an oil spill