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Important Questions: Our Changing Earth - Class 7 MCQ


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10 Questions MCQ Test Social Studies (SST) Class 7 - Important Questions: Our Changing Earth

Important Questions: Our Changing Earth for Class 7 2024 is part of Social Studies (SST) Class 7 preparation. The Important Questions: Our Changing Earth questions and answers have been prepared according to the Class 7 exam syllabus.The Important Questions: Our Changing Earth MCQs are made for Class 7 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Important Questions: Our Changing Earth below.
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Important Questions: Our Changing Earth - Question 1

The place on the surface above the focus is called the ________________ .

Detailed Solution for Important Questions: Our Changing Earth - Question 1
  • The location inside the Earth where an earthquake begins is called the focus (or hypocenter) of the earthquake.
  • The point at the Earth's surface directly above the focus is called the epicenter of the earthquake.
  • At the epicenter, the strongest shaking occurs during an earthquake.
Important Questions: Our Changing Earth - Question 2

Which of the following is NOT associated with earthquake ?

Detailed Solution for Important Questions: Our Changing Earth - Question 2

A "vent" is associated with volcanic activity, where it refers to an opening in the Earth's surface through which volcanic material is emitted. The other options (fault, epicenter, and focus) are all related to earthquakes:

  • Fault: A fracture in the Earth's crust where movement has occurred, causing an earthquake.
  • Epicentre: The point on the Earth's surface directly above the earthquake's focus.
  • Focus: The location within the Earth where the earthquake originates.
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Important Questions: Our Changing Earth - Question 3

What do you mean by erosion?

Detailed Solution for Important Questions: Our Changing Earth - Question 3

Erosion is wearing away of landscape by agents like water, wind, ice etc

Important Questions: Our Changing Earth - Question 4

It is a circular opening through which hot molten material erupt suddenly. This opening is called ______________ .

Detailed Solution for Important Questions: Our Changing Earth - Question 4
  • Fine particles of pulverized rock blown from an explosion vent. Measuring less than 1/10 inch in diameter, ash may be either solid or molten when first erupted.
  • By far, the most common variety is vitric ash (glassy particles formed by gas bubbles bursting through liquid magma).
Important Questions: Our Changing Earth - Question 5

An active agent of erosion and deposition in the deserts is ____________ .

Detailed Solution for Important Questions: Our Changing Earth - Question 5

Wind is an active agent of erosion and deposition. In deserts we can see the rocks in the shape of mushroom due to the erosion of the lower part of the rock that is why mushroom rocks have wider top and narrower base.

Important Questions: Our Changing Earth - Question 6

When the wind blows, it lifts and transports sand from one place to another. When it stops blowing the sand falls and gets deposited in low hill like structures. These are called

Detailed Solution for Important Questions: Our Changing Earth - Question 6

When the wind blows, it lifts and transports sand from one place to another. When it stops blowing the sand falls and gets deposited in low hill – like structures. These are called sand dunes.

Important Questions: Our Changing Earth - Question 7

Large deposits of loess is found in

Detailed Solution for Important Questions: Our Changing Earth - Question 7
  • Loess is an aeolian sediment formed by the accumulation of wind-blown silt, typically in the 20–50 micrometer size range, twenty percent or less clay and the balance equal parts sand and silt that are loosely cemented by calcium carbonate.
  • Extensive loess deposits are found in northern China, the Great Plains of North America, central Europe, and parts of Russia and Kazakhstan.
  • The thickest loess deposits are near the Missouri River in the U.S. state of Iowa and along the Yellow River in China.
  • Loess accumulates, or builds up, at the edges of deserts.
Important Questions: Our Changing Earth - Question 8
Which of the following natural events is caused by exogenic forces?
Detailed Solution for Important Questions: Our Changing Earth - Question 8
River erosion is an example of a process driven by exogenic forces, which are external forces acting on the Earth's surface, such as water flow, wind, and glacial movements.
Important Questions: Our Changing Earth - Question 9
What is the name given to the raised banks formed by the deposition of sediments along the river's banks?
Detailed Solution for Important Questions: Our Changing Earth - Question 9
Levees are the raised banks formed by the deposition of sediments along the river's banks during flooding.
Important Questions: Our Changing Earth - Question 10
During a school earthquake drill, your teacher instructs the class to take shelter. You see a kitchen counter, a large window with curtains, a wall with mirrors, and a fireplace in the classroom. Where should you take shelter to ensure your safety?
Detailed Solution for Important Questions: Our Changing Earth - Question 10
The safest place to take shelter during an earthquake is under a kitchen counter, table, or desk, or against an inside corner or wall away from windows and fireplaces. These areas provide protection from falling debris and reduce the risk of injury from shattered glass or collapsing structures.
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