Chapter 7: Questions and Answers

CHAPTER 7: QUESTIONS AND ANSWERS

1. Volcanoes started on earth about how long ago?

A. 4.6 billion years ago B. 4 billion years ago C. 2.6 billion years ago D. 1.2 billion years ago

2. What volcano on earth now is the oldest among all volcanoes?

A. Mount Pinatubo B. Mount Vesuvius C. Mount Etna D. Mount Ruiz

3. What type of volcano began and developed with a single event?

A. Cinder cone B. Composite volcano C. Lava dome D. Shield volcano

4. What volcano type is also called a stratovolcano?

A. Cinder cone B. Composite volcano C. Lava dome D. Shield volcano

5. What feature is seen with shield volcanoes but not with composite volcanoes?

A. Ash B. Explosivity C. Acidic lava D. Lava tubes

6. What feature is seen in composite volcanoes but not in shield volcanoes?

A. Andesite lava B. Frequent eruptions C. Found on divergent zones D. Broad sloping sides

7. What is the main difference between a Surtseyan eruption and a strombolian one?

A. Surtseyan eruptions involve the interaction of water and magma. B. There is just one singe giant explosion in Surtseyan eruptions. C. Surtseyan eruptions have little ash. D. Surtseyan eruptions are only seen in deep ocean waters.

8. You see some accretional lapilli near a volcano. What do they look like?

A. Jagged pieces of pumice stone B. Spherical balls C. Giant black boulders D. White ash in layers

9. What gas emission most signifies an upcoming volcanic eruption event?

A. Sulfur dioxide B. Methane C. Water vapor D. Carbon dioxide

10. What is not easily able to be detected with remote sensing devices in order to predict a volcanic eruption?

A. Soundwaves B. Ground deformation C. Underwater temperature D. Sulfur dioxide concentrations