1. Earthquakes & Volcano Review

2. 1) What do the dots on the graph represent?
Volcanoes
Earthquakes

3. 2) The dots form mostly on the same lines
2) The dots form mostly on the same lines. What are these lines representing?
Plate Boundaries

4. 3) What is the Ring of Fire
3) What is the Ring of Fire? 4) Where is the ring of fire on the above diagram?
An Arc of intensive seismic and volcanic activity surrounding the Pacific Plate.

5. 5) What U.S. states are a part of the Ring of Fire?
Alaska
Washington
Oregon
California

6. 6) What U.S. State is in the middle of the ring of fire?
Hawaii

7. 7) How is an earthquake produced?
With the sudden movement of the ground caused by the release of energy when the rocks move along a fault.

8. 8) Label the parts in the earthquake picture.

9. A break in the rock where movement occurs.
9) What is a fault?
A break in the rock where movement occurs.

10. 10) What is the epicenter of an earthquake?
A point on the Earth’s surface where the Earthquake is first felt

11. 11) What is the focus of the earthquake?
Where the first movement occurs in the Earth’s Crust

12. 12) What piece of equipment can measure seismic waves?
A Seismograph

13. 13) The area in the picture where no seismic waves occur after the earthquake is called the:
Shadow Zone

14. 14) Label the diagrams below.

15. 15) Identify each wave as either an S-Wave or a P-wave

16. 16) Speed of wave A: Speed of wave B: Fastest 2nd Fastest 17) A Movement: B Movement: Back and Forth Perpendicular 18) A moves through: B moves through: Solid, Liquid, Gas Solid

17. 19) What does the Richter Scale tells about an earthquake?
Magnitude; Strength

18. 20) What does the Mercalli scale tell us about an earthquake?
Intensity: the amount of damage that occurred

19. 21) The damage an earthquake does is called:
Its Intensity – Mercalli Scale

20. 22) The strength of an earthquake is called its:
Magnitude – Richter Scale

21. 23) What is a tsunami?
A giant wave that forms after a volcanic eruption, submarine earthquake or landslide.

22. 24) Where is magma found?
Below ground

23. 25) Where would lava be found?
Above Ground

24. 26) Label the three types of volcanoes
Cinder Cone
Shield
Composite

25. 27) Describe the slopes of each volcano.
In-between
Gently sloping
Steep

26. 27) Describe the eruptions of each volcano?
Local
Quiet
Explosive

27. 28) Crater Lake, Oregon is a _______________ that formed when the magma chamber below a volcano partially emptied and cause the ground to sink. Caldera

28. Fill in the Diagram

29. If the mass of the crust increases, it sinks.
If thick ice sheets covered large parts of Earth’s continents again, how would you expect the lithosphere to respond to the added weight of the continental ice sheets? Explain your answer.
Isostasy- The balance between the pull of gravity on the lithosphere and the push of the asthenosphere.
If the mass of the crust increases, it sinks.
New mountains, glaciers, sediment deposition
If the mass of the crust decreases, it rises.
Erosion of mountains, melting of glaciers.

30. If the mass of the crust increases, it sinks.
How would the isostatic adjustment that results from the melting of glaciers differ from the isostatic adjustment that may occur when a large river empties into the ocean? Support your answer.
Isostasy- The balance between the pull of gravity on the lithosphere and the push of the asthenosphere.
If the mass of the crust increases, it sinks.
New mountains, glaciers, sediment deposition
If the mass of the crust decreases, it rises.
Erosion of mountains, melting of glaciers.