Y9 geography about earthquakes , tectonic plates, volcanoes and tsunamis Flashcards

1
Q

What are tectonic plates?

A

Large sections of the Earth’s lithosphere that move and interact with each other.

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2
Q

What is the primary cause of earthquakes?

A

The movement of tectonic plates along fault lines.

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3
Q

True or False: Volcanoes can only form at tectonic plate boundaries.

A

False

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4
Q

What is the Ring of Fire?

A

A major area in the basin of the Pacific Ocean where a large number of earthquakes and volcanic eruptions occur.

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5
Q

Fill in the blank: The point on the Earth’s surface directly above the focus of an earthquake is called the ______.

A

epicenter

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6
Q

What type of plate boundary is characterized by plates moving away from each other?

A

Divergent boundary

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7
Q

What is a tsunami?

A

A series of large ocean waves caused by underwater disturbances, such as earthquakes or volcanic eruptions.

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8
Q

Short Answer: Name one method used to measure earthquake magnitude.

A

Richter scale or Moment magnitude scale.

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9
Q

Which type of volcano is characterized by gentle slopes and non-explosive eruptions?

A

Shield volcano

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10
Q

True or False: All earthquakes are caused by human activities.

A

False

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11
Q

What is the focus of an earthquake?

A

The point within the Earth where the earthquake originates.

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12
Q

What kind of tectonic plate boundary can cause mountains to form?

A

Convergent boundary

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13
Q

Fill in the blank: Magma that reaches the Earth’s surface is called ______.

A

lava

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14
Q

What is a fault line?

A

A fracture in the Earth’s crust along which movement has occurred.

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15
Q

Short Answer: Name a famous volcano in Italy.

A

Mount Vesuvius.

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16
Q

Which layer of the Earth contains tectonic plates?

A

The lithosphere.

17
Q

True or False: Tsunamis can occur in lakes as well as oceans.

18
Q

What is the term for the volcanic material ejected during an eruption?

19
Q

What are the three main types of tectonic plate boundaries?

A

Divergent, convergent, and transform boundaries.

20
Q

Fill in the blank: The process by which one tectonic plate moves under another is called ______.

A

subduction

21
Q

What is a lahar?

A

A destructive mudflow on the slopes of a volcano.

22
Q

Short Answer: What is the term for the intensity of shaking during an earthquake?

A

Seismic intensity.

23
Q

True or False: Earthquakes can only happen in certain parts of the world.

24
Q

What is a volcanic island?

A

An island formed by volcanic activity, often from eruptions under the ocean.

25
What is the difference between magma and lava?
Magma is molten rock beneath the Earth's surface; lava is magma that has erupted onto the surface.
26
Fill in the blank: The scale used to classify the damage caused by an earthquake is called the ______ scale.
Mercalli
27
What is the main hazard associated with tsunamis?
Flooding and destruction caused by the large waves.
28
True or False: The Earth's crust is the thickest layer of the Earth.
False
29
What type of volcano is known for explosive eruptions and steep slopes?
Stratovolcano
30
Short Answer: What is the name of the largest tectonic plate?
Pacific Plate.