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Olympiad Test: Some Natural Phenomena - Class 8 MCQ


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20 Questions MCQ Test - Olympiad Test: Some Natural Phenomena

Olympiad Test: Some Natural Phenomena for Class 8 2024 is part of Class 8 preparation. The Olympiad Test: Some Natural Phenomena questions and answers have been prepared according to the Class 8 exam syllabus.The Olympiad Test: Some Natural Phenomena MCQs are made for Class 8 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Olympiad Test: Some Natural Phenomena below.
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Olympiad Test: Some Natural Phenomena - Question 1

The resin which produces spark is

Olympiad Test: Some Natural Phenomena - Question 2

The like charges:

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Olympiad Test: Some Natural Phenomena - Question 3

The shaking of earth is called:

Olympiad Test: Some Natural Phenomena - Question 4

Lightning occurs due to:

Olympiad Test: Some Natural Phenomena - Question 5

Interaction of charges is called:

Detailed Solution for Olympiad Test: Some Natural Phenomena - Question 5

Lightning is a naturally occurring electrostatic discharge during which two electrically charged regions in the atmosphere.

Olympiad Test: Some Natural Phenomena - Question 6

Sparks can be seen on an electric pole when wires become

Olympiad Test: Some Natural Phenomena - Question 7

Benjamin Franklin showed lightning in

Olympiad Test: Some Natural Phenomena - Question 8

The charge acquired by a glass rod when it is rubbed with a silk is

Detailed Solution for Olympiad Test: Some Natural Phenomena - Question 8

When you are rubbing the glass rod with the silk cloth, electrons are stripped away from the atoms in the glass and transferred to the silk cloth. This leaves the glass rod with more positive than negative charge, so you get a net positive charge.

Olympiad Test: Some Natural Phenomena - Question 9

Lightning occurred when two charges meet they are

Olympiad Test: Some Natural Phenomena - Question 10

Lightning conductor

Olympiad Test: Some Natural Phenomena - Question 11

We cannot predict cyclones.

Detailed Solution for Olympiad Test: Some Natural Phenomena - Question 11

Scientists use a measure called Potential intensity to help them forecast the strength of trophical cyclones, aka hurricanes or typhoons.
Potential intensity, a theoretical framework of large - scale ocean - atmosphere processes, helps scientists forecast the power of a cyclone.

Olympiad Test: Some Natural Phenomena - Question 12

 We cannot predict earthquake. 

Olympiad Test: Some Natural Phenomena - Question 13

We can use wired telephone at the time of lightning. 

Olympiad Test: Some Natural Phenomena - Question 14

Richter scale is used to measure earthquake. 

Olympiad Test: Some Natural Phenomena - Question 15

We should build heavy houses in a danger zone.

Detailed Solution for Olympiad Test: Some Natural Phenomena - Question 15

Houses made up of Wood frame homes, properly resist earthquakes, ain't coming down in an earthquake up to about an 8.0. They can take a huge beating and still stand.

Olympiad Test: Some Natural Phenomena - Question 16

Lightning strike destroys life and property.

Detailed Solution for Olympiad Test: Some Natural Phenomena - Question 16

Death: Lightning strikes can cause cardiac arrest, which can lead to death.

Injuries: Lightning strikes can cause muscle pain, broken bones, burns, confusion, hearing loss, seizures, behavioral changes, and ocular cataracts.

Property damage: Lightning strikes can create shockwaves that can blow out windows, crack foundations, and damage brick and stonework. Lightning can also damage electrical appliances, tall trees, and crops.

Olympiad Test: Some Natural Phenomena - Question 17

Like charges attract each other.

Detailed Solution for Olympiad Test: Some Natural Phenomena - Question 17
  • Like charges repel each other, while opposite charges attract.
  • This behavior is due to the electromagnetic force, which governs the interactions between charged particles.
  • For example, two positively charged objects will push away from each other, and the same goes for negatively charged objects.
  • This fundamental principle is crucial in understanding electricity and magnetism.
Olympiad Test: Some Natural Phenomena - Question 18

The electric charges produced by rubbing are called static charges.

Detailed Solution for Olympiad Test: Some Natural Phenomena - Question 18

The electric charges produced by rubbing are called static charges.
Answer: a.
- When two different materials are rubbed together, electrons can transfer from one material to the other.
- This transfer of electrons causes one material to become positively charged and the other negatively charged.
- These charges remain stationary on the surface, hence they are called static charges.

Olympiad Test: Some Natural Phenomena - Question 19

The outermost layer of earth is in one piece.

Detailed Solution for Olympiad Test: Some Natural Phenomena - Question 19

Earth's outermost layer consisting of the crust and the upper mantle. Solid snd rigid. The crust of the Earth is broken into many pieces called lithospheric plates. The plates "float "  on the soft, semi rigid Asthenosphere. 
So, the given statement is false.

Olympiad Test: Some Natural Phenomena - Question 20

In ancient times people did not know the true causes of earthquake.

Detailed Solution for Olympiad Test: Some Natural Phenomena - Question 20

In ancient times earthquakes were thought to be caused by restless gods or giant creatures slumbering beneath the earth.Therefore, option (a)  In ancient times people did not know the true causes of earthquake is the correct✔ answer.

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