1. What type of volcano was Crater Lake?
a. Shield
b. dome
c. composite cone
d. cinder cone
2. What state is Crater Lake National Park in?
a. California
b. Washington
c. Oregon
d. Montana
3. What is the difference between a caldera and a crater?
a. A crater is deeper
c. a crater has a smaller diameter
b. A crater is only formed by meteorites
d. calderas are only formed during quiet eruptions
4. What type of volcanoes exist within Crater Lake National Park?
a. Only stratovolcanoes
b. Only composite cone volcanoes
c. Composite cone volcanoes and shield volcanoes
d. All types
5. About how long ago did Mt. Mazama start erupting?
a. 10,000 years b. 7,000 years c. 700 years d. great than 10,000 years ago
6. How could the volcanic activity of Mt. Mazama be described from the time it reached its maximum
height to the time of its main eruption?
a. Very active
b. Relatively inactive
c. A mix of violent and quiet eruptions
d. None of the above, its main eruption occurred at about the same time it reached its max height.
7. Crater Lake National Park receives a lot of rain, yet the level of Crater Lake hasn’t risen for many years.
This is because: _____________________.
a. It’s rained much less in the past
b. Lake water leaks out through fissures at the bottom of the lake
c. Precipitation is balanced by evaporation
d. Crater Lake caldera is actively growing
8. What is significant about the depth and clarity of Crater Lake?
a. It is the deepest and clearest lake in North America.
b. It is deceptively shallow and clear.
c. It is very deep and the blue color is produced by leaking volcanic gases.
d. Its depth and clarity are constantly changing.
9. Of the rocks shown below, which are you least likely to find at Crater Lake National Park.
a. Andesite
b. Basalt
c. Rhyolite
d. Marble