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Environmental Science Grade 4-5

Water Pollution: Sources and Solutions

Identifying pollution sources and ways to protect clean water

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Practice identifying common sources of water pollution and choosing actions that help keep rivers, lakes, oceans, and groundwater clean.

Read each problem carefully. Use complete sentences when explaining your thinking.

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Identifying pollution sources and ways to protect clean water

Environmental Science - Grade 4-5

Instructions: Read each problem carefully. Use complete sentences when explaining your thinking.
  1. 1
    Rain washes litter from a parking lot into a storm drain that leads to a creek.

    A storm washes litter from a parking lot into a storm drain that leads to a nearby creek. Explain how the litter can become water pollution.

  2. 2
    Farm runoff carries soil and waste toward a stream.

    Name two possible sources of water pollution from a farm.

  3. 3
    Paint should not be poured down a sink and should be taken for safe disposal.

    A family pours old paint down a sink drain. Describe why this is harmful and what they should do instead.

  4. 4
    A town river scene with litter, dirty runoff, car wash water, and construction mud near the water.

    Look at the scene of a river near a town. List three things in the scene that could pollute the river.

  5. 5
    Driveway car washing sends soapy water to a storm drain, while a car wash treats its water.

    Choose the better action: washing a car in a driveway or washing a car at a car wash that treats its wastewater. Explain your choice.

  6. 6
    Fertilizer runoff from a lawn flows into a pond and causes algae growth.

    A pond has too much algae after heavy rain washes lawn fertilizer into it. Explain how fertilizer can cause this problem.

  7. 7
    A creek receives pollution from one factory pipe and runoff from roads and lawns.

    Sort each item as a point source or nonpoint source of pollution: a pipe releasing dirty water from one factory, oil washing off many roads after rain, and fertilizer running off many lawns.

  8. 8
    Picking up pet waste prevents it from washing into storm drains and streams.

    Explain why picking up pet waste helps protect water quality.

  9. 9

    A student sees someone throwing a plastic bag near a stream. Write one polite sentence the student could say to encourage a better choice.

  10. 10
    Water cycle diagram showing rain, runoff, rivers, and groundwater carrying pollution from land to water.

    Study a simple diagram of the water cycle with clouds, rain, land, rivers, and groundwater. Explain one way pollution on land can reach water.

  11. 11

    A school wants to reduce water pollution. Choose two actions the school could take and explain how each one helps.

  12. 12
    Rain washes loose soil from a construction site into a nearby stream.

    A construction site has bare soil near a stream. Explain why this can be a water pollution problem after a rainstorm.

  13. 13
    Used motor oil should go to a recycling collection center, not a ditch or storm drain.

    Which is the best way to dispose of used motor oil: pour it in a ditch, put it in a storm drain, or take it to a recycling center that accepts oil? Explain your answer.

  14. 14
    A watershed shows water from distant homes and roads draining into the same river.

    In a watershed, all water drains to the same river, lake, or ocean. Explain why people who live far from a river can still affect the river's water quality.

  15. 15

    Write a short plan with three steps your family could follow to help prevent water pollution at home.

LivePhysics™.com Environmental Science - Grade 4-5

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