1. D
2. A
3. C
4. C
5. C
6. B
7. C
8. C
9. D

1. What pyroclastic material fragment less than 2 mm in diameter of lava or rock blasted into the air by volcanic explosions?

• A. Bombs
• B. Cinder
• C. Pumice
• D. Volcanic ash

2. What lava flow material that has a rough, jagged, spiny, & generally clinker surface?

• А. Аа
• B. Blocks
• C. Cinder
• D. Lapilli

3. Which of the following is an example of lava flow material?

• А. Аа
• B. Cinder
• C. Scoria
• D. Tephra

4. Which of the following are example of pyroclastic material?

• A. Aa, Pahoehoe, Pillow Lava, Lava
• B. Aa, Lava, Bombs, Cinder
• C. Lava, Pahoehoe, Pumice, Scoria
• D. Bombs, Cinder, Pumice, Scoria

5. Which of the following is positive effect of volcanic eruption?

• A. It can cause loss of infrastructure.
• C. It produces very rich soils for farming.
• B. There will be the destruction of crops.
• D. Volcanic eruptions can cause a decrease in th Earth's surface temperature.

6. Which of the following is a negative effect of volcanic eruption?

• A. It serves as a tourist spot.
• B. It produces very rich soils for farming
• C. It can cause loss of lives and properties
• D. People became creative by making earthenwa out of ashfall.

7. What do you call the heat or thermal energy that is stor4ed deep within the Earth that origina from the melted magma and the decay of radioactive substance?

• A. Biomass
• B. Geothermal
• C. Hydropower
• D. Solar

8. Which of the following devices is used in a geothermal power plant?

• A. Heat
• B. Steam
• C. Turbine
• D. Well

9. Which will cause the turbine in the geothermal power plant to turn?

• A. Electricity
• B. Heat
• C. Steam
• D. Water

10. Which converts the mechanical energy into electrical energy in a geothermal power plant?

• A. Condense
• B. injection weil
• C. Production well
• D. Turbines