1. False. The crust is the outer layer of the Earth.
2. True.
3. False. Magma is molten rock beneath the Earth’s crust; lava is magma that has erupted onto the surface.
4. False. Most inactive volcanoes are dormant, not dead.
2. Identify the different parts of the Earth’s structure.
- Outermost layer: Crust
- Middle layer: Mantle
- Innermost layer: Core
3. Identify the following things in the scheme:
1. Gases — smoke/ash cloud above the volcano
2. Volcanic cone — the main mountain shape of the volcano
3. Magma — molten rock inside the volcano before eruption
4. Lava — molten rock flowing out of the vent
5. Vent — the opening at the top through which material erupts
6. Ashes — fine particles ejected into the air
7. Bombs — larger lumps of solidified lava ejected during eruption
4. Answer the following questions. Use a relative pronoun (who / which / where) in the answers
1. An active volcano is one which is still active and erupts frequently.
2. A dormant volcano is one which is temporarily inactive but not fully extinct.
3. An extinct volcano is one which hasn’t erupted for at least 100,000 years.
4. Krakatau is a volcano in Indonesia which erupted in 1883 and was heard 5,000 km away.
5. In Pompeii in 79 AD, the city was completely buried under volcanic ash when Vesuvius erupted.
6. Volcanologists are scientists who study volcanoes and volcanic phenomena.
7. Mauna Loa in Hawaii is the world’s largest volcano, which reaches 4,170 m above sea level.
Parent Tip: Review the logic above to help your child master the concept of volcanoes and earthquakes worksheet.
