Natural disaster solutions · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.
به انگلیسی

Comparing ways to stay safe

Science · Volcanoes & Earthquakes · ages 9-10
Name ______________________   Date ____________

  1. Which change is designed to reduce building damage from earthquake shaking?

    • Using paint that makes outside walls brighter
    • Using earthquake-resistant building designs
    • Adding flower beds beside the building walls

  2. Which statement correctly matches a natural hazard with its possible harm?

    • Earthquakes can shake and damage buildings.
    • Floods keep rising water away from buildings.
    • Volcanoes stop hot ash from reaching family homes.

  3. A flood barrier is one possible solution for reducing flood damage.

    Circle one:   True   False

  4. This made-up chart shows costs in dollars. Which flood option costs the most?

    Sandbagbarrier200Warningmessages500Flood wall900
    • Sandbag barrier
    • Warning messages
    • Flood wall

  5. A town near a volcano needs two ideas that help people leave when officials order evacuation. Which pair fits this goal?

    • Warning messages and taller playground slides
    • Fresh house paint and practiced evacuation routes
    • Warning messages and practiced evacuation routes

  6. The cheapest solution to a natural hazard is always the best choice.

    Circle one:   True   False

  7. In a made-up plan, sandbags cost $200 and warning messages cost $500. These are separate prices. How many dollars would buying both cost?

    Sandbags($)200Messages($)500

    Answer: ______________

  8. A flood plan must cost at most $800, keep at least 6 model homes dry, and be ready within 3 weeks. A: $500, 6 homes, 5 weeks. B: $700, 6 homes, 2 weeks. C: $700, 4 homes, 2 weeks. Which plan meets every limit?

    • Plan B
    • Plan A
    • Plan C
LightMySky · lightmysky.comW1-mt_cpDpjJaE5u-s1

Answer key

For grown-ups. Fold this page away before handing over the rest.

Comparing ways to stay safe W1-mt_cpDpjJaE5u-s1

  1. Using earthquake-resistant building designs · Earthquake-resistant designs address shaking damage. They reduce risk but do not guarantee an undamaged building.
  2. Earthquakes can shake and damage buildings. · Earthquake shaking can damage buildings. Floodwater and volcanic ash can also cause harm; they do not automatically protect homes.
  3. True · A wall or sandbag barrier can hold back some floodwater. It may reduce damage, although water can flow over or around it.
  4. Flood wall · The flood wall has the tallest cost bar and the largest price, $900. The other prices are $500 and $200.
  5. Warning messages and practiced evacuation routes · Messages can tell people about an evacuation order. Practiced routes help them know where to go. Neither guarantees enough warning time.
  6. False · A low price does not show whether a solution meets the safety goal. Compare effectiveness and feasibility as well as cost.
  7. 700 · Buying both means paying both separate prices. $200 + $500 = $700.
  8. Plan B · Plan B meets all three limits: $700, 6 model homes dry, and 2 weeks. Plan A takes too long. Plan C keeps too few homes dry.
Worksheet · LightMySky