Some Natural Phenomena Test

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Some Natural Phenomena Test - 22

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Question 1
1 / -0

What is the approximate lightning frequency?

A
1.4 billion flashes per year

B
1.4 billion flashes per month

C
1.5 billion flashes per year

D
1.6 billion flashes per year

Solution

Lightning is a sudden high-voltage discharge of electricity that occurs within a cloud, between clouds, or between a cloud and the ground. Globally, there are about 40 to 50 flashes of lightning every second, or nearly 1.4 billion flashes per year. These electrical discharges are powerful and deadly.
Question 2
1 / -0

How does lightning occur between two charges within the cloud?

A
When two negative charges grow large enough then a giant lightning sparks occurs

B
When positive and negative charges grow large enough then a giant lightning sparks occurs

C
When two positive charges grow large enough then a giant lightning sparks occurs

D
None

Solution

Build up of electrostatic charge in the clouds results in lightning. During this event, one region of the cloud is accumulated with positive charge whereas the other region is accumulated with negative charge. Hence when positive and negative charges grow large enough, the air present being non-conductive no more resists the flow of charges and electric discharge can be seen in the form of giant lightning sparks.
Question 3
1 / -0

Earthquake can cause:

A
Tsunami

B
Floods

C
Landslide

D
All of the above

Solution

An earthquake is a sudden shaking or trembling of the earth. Earthquake is caused by a disturbance deep inside the earth’s crust. Earthquakes can cause floods, landslides, and tsunamis.
Question 4
1 / -0

What is meant by lightning?

A
It is sudden electrostatic discharge during an electrical storm between electrically charged regions of cloud.

B
It is sudden electrostatic discharge during an electrical storm between non-electrically charged regions of cloud.

C
It is unsudden electrostatic discharge during an electrical storm between electrically charged regions of cloud.

D
None of the above

Solution

Lightning occurs when there is a build up of the electrostatic charge in clouds. Regions within the cloud, one builds up a positive whereas other builds up a negative charge.
Question 5
1 / -0

Electroscope is used

A
to detect and test small electric charges

B
to calculate the amount of electric charge flowing through the conductor in the given interval of time

C
to find out the presence of antimatter

D
to test the presence of magnetic field

Solution

Electroscope is an old electrical instrument , used to detect the presence and magnitude of electric charges on a body .
Question 6
1 / -0

The movement of Earth's plates causes

A
Lightening

B
Cyclons

C
Earthquake

D
Thunderstorms

Solution

The movement of Earth's plates causes Earthquake. Earth's crust is broken up into large pieces called tectonic plates. Tectonic plates are giant pieces of the Earth's crust that fit together and move around on the Earth's surface. Tectonic plates are constantly moving slowly, but sometimes friction between them causes them to lock together and become unable to move. The rest of the plates carry on moving, which leads to increased pressure on the locked section. Eventually, the locked section succumbs to the pressure, and the plates move past each other rapidly. This movement causes a tectonic earthquake. The waves of released energy move through the Earth's crust and cause the shaking we feel at an earthquake site.
Question 7
1 / -0

Lightning is also known as :

A
Mechanical energy.

B
Electric discharge.

C
Potential current.

D
Kinetic current.

Solution

Lightning occurs when there is a build up of electrostatic charge in the cloud and it discharges with streaks of light and sound. Hence, lightning is also known as electric discharge.
Question 8
1 / -0

When there is lightning and
a) You are in a jungle ,go under a tall tree.
b) You are in a jungle,go under a canopy of small trees and bushes.
c) You are out in the open,crouch on your feet,do not stand up or lie on the ground.
d) You are in an open field,stay there rather than go inside a completely covered building.Of these the good strategies are :-

A
B and C

B
A and C

C
A,B and C

D
A,C and D

Solution

When there is lightning and you are in a jungle, it is better to go under a canopy of small trees and bushes. The electric field is strongest near the pointed tip of an electrical conductor, and so isolated trees often make for great targets for lightning strikes. The canopy of small trees does not allow charge concentration on the other hand.
Standing out in a field far from trees may also pose risks too as it makes you the tallest object around and maybe a target for lightning strikes. The idea will be to crouch low so that you are not the tallest object around and at the same time keep your feet close together with your heels touching. This will help the electricity to go in one foot and out the other.
Question 9
1 / -0

Instrument used to measure earthquake is known as :

A
Typanic graph

B
Seismograph

C
Quake graph

D
Quake meter

Solution

The seismograph is an instrument that measures seismic waves caused by an earthquake.
Question 10
1 / -0

Which of the following is/are true regarding Earthquake ?

A
It refers to shaking of the Earth.

B
It occurs due to release of energy.

C
It generates waves that travel in all direction.

D
All of the above.

Solution

Earth's crust is broken up into large pieces called tectonic plates. Tectonic plates are giant pieces of the Earth's crust that fit together and move around on the Earth's surface. Tectonic plates are constantly moving slowly, but sometimes friction between them causes them to lock together and become unable to move. The rest of the plates carry on moving, which leads to increased pressure on the locked section. Eventually, the locked section succumbs to the pressure, and the plates move past each other rapidly. This movement causes a tectonic earthquake. The waves of released energy move through the Earth's crust in all direction and cause the shaking we feel at an earthquake site.

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Some Natural Phenomena Test - 22

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Some Natural Phenomena Test - 22

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Question 1

1.4 billion flashes per year

1.4 billion flashes per month

1.5 billion flashes per year

1.6 billion flashes per year

Solution

Question 2

When two negative charges grow large enough then a giant lightning sparks occurs

When positive and negative charges grow large enough then a giant lightning sparks occurs

When two positive charges grow large enough then a giant lightning sparks occurs

None

Solution

Question 3

Tsunami

Floods

Landslide

All of the above

Solution

Question 4

It is sudden electrostatic discharge during an electrical storm between electrically charged regions of cloud.

It is sudden electrostatic discharge during an electrical storm between non-electrically charged regions of cloud.

It is unsudden electrostatic discharge during an electrical storm between electrically charged regions of cloud.

None of the above

Solution

Question 5

to detect and test small electric charges

to calculate the amount of electric charge flowing through the conductor in the given interval of time

to find out the presence of antimatter

to test the presence of magnetic field

Solution

Question 6

Lightening

Cyclons

Earthquake

Thunderstorms

Solution

Question 7

Mechanical energy.

Electric discharge.

Potential current.

Kinetic current.

Solution

Question 8

B and C

A and C

A,B and C

A,C and D

Solution

Question 9

Typanic graph

Seismograph

Quake graph

Quake meter

Solution

Question 10

It refers to shaking of the Earth.

It occurs due to release of energy.

It generates waves that travel in all direction.

All of the above.

Solution

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