Volcanoes and Earthquakes Y8

Which of the following statements is not true about the illustration?

• This is how the Hawaiian Islands were formed.

• The plates are moving apart

• Divergent boundary

• The ridge or rift is where the volcano is formed.

Which of the following statements is not true about the illustration?

• This is how the Hawaiian Islands were formed.

• Convergent boundary

• The plate is moving over a hot spot

• The hot spot punches through the crust to form volcanic islands.

Which of the following statements is not true about the illustration?

• The plates are sliding past another

• Convergent boundary

• One plate is sinking under another plate

• The sinking plate melts and forces magma upward

Which of the following is not a shape of a volcano?

• Shield

• Strata Cone

• Cinder Cone

• Caldera

Why is magma forced towards the Earth's surface?

• Magma has higher density than the surrounding rocks so it rises.

• Magma has lower density than the surrounding rocks so it rises.

• Magma has gases trapped inside to make it float.

• Magma is easily squeeze out of the mantle

Which is not true about volcanoes?

• Some volcanoes oozes lava without any violent eruption

• Caldera is a wide opening of an active volcano.

• Volcanoes can be active or dormant

• Extinct volcanoes can still erupt after 100 years

Which is not an effect of volcanic eruptions?

• Ash, lava and gases explode from the crater of a volcano.

• Lava flows can destroy properties or buildings.

• Volcanic ash fall can cause brain cancer.

• Pyroclastic flow can destroy trees and properties when it rushes down the side of the volcano.

Which illustration does not show the formation of a volcano?

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Which island is the oldest?

• Hawaii

• Kauai

• Niihau

• Maui

Which island is the youngest?

• Niihau

• Hawaii

• Kauai

• Maui