Water on the Move: teacher key

Natural Disasters, grade 5 edition, written for 5th grade. Waves can race across the ocean, and storms can push the sea onto land. See how scientists watch for big water and what a family can do.

Read the book. Print this page for the key.

Questions and answers

1. What are aftershocks?
   • Smaller earthquakes after a larger one (answer)
   • Winds in a hurricane
   • Waves in a flood
2. How fast can a tsunami move in the deep ocean?
   • As fast as a bicycle
   • As fast as a jet plane (answer)
   • As fast as a snail
3. What does storm surge mean?
   • A hurricane's calm center
   • Sea water pushed onto land by storm winds (answer)
   • Rain that lasts a week
4. Why is it unsafe to walk through fast-moving flood water?
   • Just 6 inches can knock a person over (answer)
   • It is always very cold
   • It makes noise
5. What does a tornado warning mean?
   • A tornado is possible
   • A tornado is near and it is time to move to a safe place (answer)
   • A tornado has stopped
6. Which instrument measures shaking waves?
   • A seismometer (answer)
   • A satellite
   • A radio

Words

• seismometer: shake measurer
• aftershocks: later small quakes
• tsunamis: big ocean waves
• evacuate: leave for safety
• surge: pushed water