Science 5 - Volcanoes

What are the three main types of active volcanoes?

• shield volcanoes, stratovolcanoes, cinder-cone volcanoes

• active volcanoes, dormant volcanoes, extinct volcanoes

• lava volcanoes, caldera volcanoes, crater volcanoes

• composite volcanoes, dormant volcanoes, cinder-cone volcanoes

What is the difference between composite volcanoes and shield volcanoes?

• Composite cones are tall, cone shaped volcanoes that produce explosive eruptions while the shield volcanoes form very large, gently sloped volcanoes with a wide base.

• Composite cones form very large, gently sloped volcanoes with a wide base while the shield volcanoes are steep, conical hills that usually have a prominent crater at the top.

• Composite volcanoes have explosive eruptions, while shield volcanoes have gentle eruptions.

• Composite cones are tall, cone-shaped volcanoes that produce explosive eruptions while shield volcanoes are the smallest volcanic landform.

What is a cinder cone volcano and how does it form?

• Cinder cone volcanoes form from lava flows that cool rapidly on the surface and spread over a large area. These mountains have a broad base and gently sloping sides.

• Cinder cone volcanoes are built by thick lava that is thrown high into the air and falls as chunks or cinders. These mountains form as a cone shape with a narrow base and steep sides.

• Cinder cone volcanoes are built from the erosion of sedimentary rocks over time. These mountains form as a cone shape with a narrow base and steep sides.

• Cinder cone volcanoes form from the collapse of a large magma chamber. These mountains have a broad base and gently sloping sides.

How do volcanic eruptions contribute to the formation of new land?

• Volcanic eruptions contribute to the formation of new land by causing massive earthquakes.

• Volcanic eruptions contribute to the formation of new land by reducing the landmass.

• Volcanic eruptions contribute to the formation of new land by releasing lava, ash, and gases which cool and solidify to create landmasses.

• Volcanic eruptions contribute to the formation of new land by increasing the sea levels.

What is the Ring of Fire and why is it significant in terms of volcanoes?

• The Ring of Fire is a term used to describe a peaceful and calm region with no volcanic activity.

• The Ring of Fire is a fictional location created for entertainment purposes.

• The Ring of Fire is significant in terms of volcanoes because it is a region with a high concentration of active volcanoes and frequent volcanic eruptions.

• The Ring of Fire is a man-made structure used to control volcanic eruptions.

Explain the concept of hotspots in relation to volcanic activity.

• Hotspots are areas where lava from the mantle rises through the crust, creating volcanic activity.

• Hotspots are locations where volcanic activity is dormant and poses no threat.

• Hotspots are areas where magma from the mantle rises through the crust, creating volcanic activity.

• Hotspots are regions where tectonic plates collide, causing volcanic eruptions.

What are the dangers associated with living near a volcano?

• Tsunamis caused by volcanic eruptions.

• Various hazards like lava flows, ash clouds, pyroclastic flows, lahars, and volcanic gases.

• Increased property value due to proximity to a natural wonder.

• Enhanced land and air quality from volcanic gases.

How do volcanic eruptions affect the climate?

• Volcanic eruptions have no impact on the climate.

• Volcanic eruptions cause rainfall to increase.

• Volcanic eruptions can lead to a cooling effect on the climate by releasing particles that block sunlight.

• Volcanic eruptions always lead to global warming and increases greenhouse gases in the atmosphere.

What is the difference between an active, dormant, and extinct volcano?

• They differ in colours, sizes, and shapes.

• Active volcanoes are always underwater while dormant and extinct volcanoes are usually above the surface.

• Dormant volcanoes are more dangerous than active volcanoes and extinct volcanoes.

• The difference lies in their current activity status and potential for future eruptions.

What is the significance of volcanic ash in agriculture?

• It reduces the pH level of the soil, making it unsuitable for plant growth.

• It attracts harmful pests to crops.

• It provides essential minerals and nutrients for plants to thrive.

• It causes soil erosion and degradation.