WHEN THE EARTH SHAKES

1
WHEN THE EARTH SHAKES

• LESSON 11

2
OBJECTIVES

• OBSERVE THE FORMATION AND MOVEMENT OF WAVES IN
  WATER
• USE A SPRING TO SIMULATE DIFFERENT KINDS OF WAVES
• RELATE WAVE MOVEMENT IN A SPRING TO EARTHQUAKE
  WAVES
• USING A SPRING TO MODEL POSSIBLE DAMAGING EFFECTS
  OF EARTHQUAKE WAVES

3
GETTING STARTED

• USING THE VIDEO AS THE BASIS OF YOUR ANSWERS
• A. HOW DID THE GROUND MOVE DURING THE
  EARTHQUAKE?
• B. WHAT WERE SOME OF THE EFFECTS OF THIS
  MOVEMENT?

4
MAKING OBSERVATIONS

• USE A TOTE TRAY FILLED WITH WATER THAT IS SET UP
  ON AN OVERHEAD PROJECTOR.
• PREDICT WHAT WOULD HAPPEN TO THE WATER IF YOU
  DROPPED A DROP OF WATER IN THE CENTER OF THE
  TRAY. RECORD THEM IN YOUR NOTEBOOK.

5
OBSERVE

• TURN ON THE PROJECTOR. LET A VOLUNTEER RELEASE
  THE DROP OF WATER INTO THE CENTER OF THE TRAY.
  DESCRIBE WHAT YOU OBSERVE IN YOUR NOTEBOOK.

6
HYPOTHESIZE

• WHY DID YOU THINK THIS HAPPENED?
• EX I THINK THE WATER ____________ BECAUSE
  ________________________________.

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POINTS TO CONSIDER

• THE DROP OF WATER CREATED A DISTURBANCE THAT
  CAUSED A WAVE OF ENERGY TO MOVE THROUGH THE
  WATER.
• THE WAVE OF ENERGY TRAVELED THROUGH THE WATER,
  BUT IT DID NOT CARRY THE WATER WITH IT. HOW COULD
  WE PROVE THIS DISCREPANT EVENT?

8

• THE WAVE STARTED WHERE THE DROP OF WATER ENTERED
  THE WATER IN THE TRAY AND MOVED OUTWARD IN ALL
  DIRECTIONS. WAVES REFL
• ECTED OFF THE SIDES OF THE TRAY.

9
HOW IS THIS EXERCISE LIKE EARTHQUAKES?

• LIKE THE DROP OF WATER, AN EARTHQUAKE CREATES A
  DISTURBANCE THAT CAUSES A WAVE OF ENERGY TO MOVE
  THROUGH THE EARTHS SURFACE.