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Test: How Tsunamis Work - Class 8 MCQ

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20 Questions MCQ Test - Test: How Tsunamis Work

Test: How Tsunamis Work for Class 8 2024 is part of Class 8 preparation. The Test: How Tsunamis Work questions and answers have been prepared according to the Class 8 exam syllabus.The Test: How Tsunamis Work MCQs are made for Class 8 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: How Tsunamis Work below.

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Test: How Tsunamis Work - Question 1

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What causes a tsunami?

A.
Hurricane
B.
Volcanic eruption
C.
Tidal wave
D.
Heavy rainfall

Detailed Solution for Test: How Tsunamis Work - Question 1

A tsunami is caused by a huge earthquake or volcanic eruption under the ocean.

Test: How Tsunamis Work - Question 2

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What does the term "tsunami" mean in Japanese?

A.
Giant wave
B.
Ocean wave
C.
Harbor wave
D.
Tidal wave

Detailed Solution for Test: How Tsunamis Work - Question 2

The Japanese word "tsunami" translates to "harbor wave" in English.

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Test: How Tsunamis Work - Question 3

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In which region do approximately 80% of tsunamis occur?

A.
Atlantic Ocean
B.
Indian Ocean
C.
Pacific Ocean's 'Ring of Fire'
D.
Arctic Ocean

Detailed Solution for Test: How Tsunamis Work - Question 3

The 'Ring of Fire' in the Pacific Ocean is responsible for about 80% of all tsunamis.

Test: How Tsunamis Work - Question 4

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What happens to tsunami waves as they approach shallower waters near the coast?

A.
They slow down and decrease in height.
B.
They slow down and increase in height.
C.
They speed up and decrease in height.
D.
They speed up and increase in height.

Detailed Solution for Test: How Tsunamis Work - Question 4

Tsunami waves slow down as they approach shallow waters, causing an increase in height.

Test: How Tsunamis Work - Question 5

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Which of the following is NOT a true statement about tsunamis?

A.
Tsunamis can travel at speeds similar to a jet plane.
B.
Tsunamis are caused by landslides.
C.
Tsunamis lose energy as they travel across oceans.
D.
Tsunamis can be as tall as 100 feet.

Detailed Solution for Test: How Tsunamis Work - Question 5

Tsunamis retain their energy and can travel across vast oceans with very little energy loss.

Test: How Tsunamis Work - Question 6

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What is the best course of action when a tsunami warning is issued?

A.
Go to the beach to observe the waves safely.
B.
Stay inside tall, multi-story buildings.
C.
Evacuate to higher ground or inland immediately.
D.
Wait for confirmation from authorities before taking any action.

Detailed Solution for Test: How Tsunamis Work - Question 6

The safest response to a tsunami warning is to evacuate to higher ground or inland immediately.

Test: How Tsunamis Work - Question 7

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What is the approximate speed at which tsunamis can travel?

A.
100 miles per hour
B.
250 miles per hour
C.
500 miles per hour
D.
800 miles per hour

Detailed Solution for Test: How Tsunamis Work - Question 7

Tsunamis can travel at speeds of up to 800 kilometers per hour in the open ocean.

Test: How Tsunamis Work - Question 8

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Tsunamis are sometimes referred to as tidal waves, but this is not technically correct because:

A.
Tidal waves are caused by earthquakes.
B.
Tidal waves are much larger than tsunamis.
C.
Tidal waves are caused by volcanic eruptions.
D.
Tidal waves are caused by gravitational interactions between celestial bodies.

Detailed Solution for Test: How Tsunamis Work - Question 8

Tidal waves are shallow water waves caused by the gravitational interactions between the sun, moon, and Earth.

Test: How Tsunamis Work - Question 9

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Which of the following areas is NOT considered a high-risk area for tsunamis?

A.
Hawaii
B.
Alaska
C.
Pacific Northwest in America
D.
Mediterranean Sea

Detailed Solution for Test: How Tsunamis Work - Question 9

While tsunamis can occur in the Mediterranean Sea, it is not considered a high-risk area compared to Hawaii, Alaska, and the Pacific Northwest.

Test: How Tsunamis Work - Question 10

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The 2004 Indian Ocean tsunami was the most devastating in modern times, and it hit how many countries?

A.
6
B.
10
C.
14
D.
20

Detailed Solution for Test: How Tsunamis Work - Question 10

The 2004 Indian Ocean tsunami affected 14 countries, causing widespread destruction and a high death toll.

Test: How Tsunamis Work - Question 11

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How many people did the 2004 Indian Ocean tsunami approximately kill?

A.
50,000
B.
100,000
C.
230,000
D.
500,000

Detailed Solution for Test: How Tsunamis Work - Question 11

The 2004 Indian Ocean tsunami resulted in the deaths of approximately 230,000 people across the affected countries.

Test: How Tsunamis Work - Question 12

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What is the first sign of an approaching tsunami usually observed on the shore?

A.
A loud roar resembling a train or aircraft
B.
Receding water from the shoreline
C.
Strong winds and rainfall
D.
Sudden darkness

Detailed Solution for Test: How Tsunamis Work - Question 12

Before a tsunami hits, the water near the shoreline may recede, exposing the sea floor as part of a vacuum effect.

Test: How Tsunamis Work - Question 13

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What happens to the waves as a tsunami approaches the coastline?

A.
They become smaller and less powerful.
B.
They become larger and more powerful.
C.
They become slower and weaker.
D.
They become faster and stronger.

Detailed Solution for Test: How Tsunamis Work - Question 13

Tsunami waves increase in height and speed as they approach the coastline.

Test: How Tsunamis Work - Question 14

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Which of the following is NOT a safety rule during a tsunami warning?

A.
Move inland to high ground immediately.
B.
Stay out of low-lying coastal areas.
C.
Seek refuge in multi-story buildings near the coast.
D.
Stay tuned to local radio or television for updates.

Detailed Solution for Test: How Tsunamis Work - Question 14

Homes and buildings located in low-lying coastal areas are not safe during a tsunami warning.

Test: How Tsunamis Work - Question 15

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What is the purpose of a tsunami warning?

A.
To predict the exact time and location of an earthquake.
B.
To provide information about past tsunamis.
C.
To instruct people to evacuate to higher ground when a tsunami is imminent.
D.
To warn people about potential volcanic eruptions.

Detailed Solution for Test: How Tsunamis Work - Question 15

The purpose of a tsunami warning is to alert people to the impending danger and advise them to move to higher ground for safety.

Test: How Tsunamis Work - Question 16

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How should one react if taken by a tsunami wave?

A.
Swim against the current to reach the shore quickly.
B.
Dive underwater to avoid the force of the wave.
C.
Grab a floating object and let the current carry you.
D.
Try to outrun the wave along the shoreline.

Detailed Solution for Test: How Tsunamis Work - Question 16

If caught in a tsunami wave, the best course of action is to grab a floating object and let the current carry you.

Test: How Tsunamis Work - Question 17

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Which of the following is NOT a true statement about tsunamis?

A.
The first tsunami wave is usually the strongest.
B.
Tsunami waves can travel across vast oceans with minimal energy loss.
C.
Tsunamis can occur due to volcanic eruptions.
D.
The term "tsunami" means "ocean wave" in Japanese.

Detailed Solution for Test: How Tsunamis Work - Question 17

The term "tsunami" means "harbor wave" in Japanese, not "ocean wave."

Test: How Tsunamis Work - Question 18

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What is the trough of a tsunami wave?

A.
The highest point of the wave
B.
The lowest point under the wave's crest
C.
The distance between two consecutive waves
D.
The point on the shore where the wave hits first

Detailed Solution for Test: How Tsunamis Work - Question 18

The trough of a tsunami wave is the lowest point under the wave's crest.

Test: How Tsunamis Work - Question 19

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What is the most common cause of tsunamis?

A.
Hurricane
B.
Volcanic eruption
C.
Asteroid impact
D.
Earthquake

Detailed Solution for Test: How Tsunamis Work - Question 19

Earthquakes are the most common cause of tsunamis, as they can trigger underwater movements that displace large amounts of water.

Test: How Tsunamis Work - Question 20

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What is the purpose of waiting for official confirmation during a tsunami warning?

A.
To avoid false alarms
B.
To have time to pack belongings
C.
To observe the receding water safely
D.
To allow time for emergency services to assess the situation

Detailed Solution for Test: How Tsunamis Work - Question 20

Waiting for official confirmation ensures that the warning is accurate and helps avoid unnecessary panic or false alarms.

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