Some Natural Phenomena Test

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Some Natural Phenomena Test - 10

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Weekly Quiz Competition

Question 1
1 / -0

The weak zones around the boundaries of plates underneath Earth, which are prone to slide and cause earthquake are commonly known as:

A
fault zone

B
eruption zone

C
explosive zone

D
sliding zone

Solution

The seismic or fault zones, placed around the boundaries of plates underneath Earth, are most prone to slide to cause earthquake.
Question 2
1 / -0

Lightning occurs because of :

A
rain

B
electric discharge

C
wind

D
shaking of earth

Solution

Answer is B.

Lightning occurs because of electric discharge.
Lightning is one of the most powerful natural forces on the planet. It is a natural discharge of the static electricity built up in storm clouds. Most lightning is formed as a part of thunderstorms. We know from observation of static electricity that static electrical discharges such as lightning are caused by separation of charges into positive and negative ions. Over time more of one charge builds until its natural attraction to the opposite charge causes it to migrate in an electrical discharge.
Question 3
1 / -0

The point where seismic waves originate is called the _______ of the earthquake

A
centre

B
epicenter

C
focus

D
origin

Solution

Answer is C.

The point where the waves originate is called the focus of the earthquake.
The point within the earth along the rupturing geological fault where an earthquake originates is called the focus, or hypocenter. The point on the earth's surface directly above the focus is called the epicenter. Earthquake waves begin to radiate out from the focus and subsequently form along the fault rupture. If the focus is near the surface between 0 and 70 km (0 and 40 mi) deepshallow-focus earthquakes are produced. If it is intermediate or deep below the crust between 70 and 700 km (40 and 400 mi) deepa deep-focus earthquake will be produced. Shallow-focus earthquakes tend to be larger, and therefore more damaging, earthquakes. This is because they are closer to the surface where the rocks are stronger and build up more strain.
Question 4
1 / -0

An earthquake is caused by

A
shaking of the earth

B
strain building up in the tectonic plates

C
plates slipping along the fault lines

D
None of the above

Solution

An earthquake is caused by strain building up in the tectonic plates.

Earthquake is shaking of the earth's surface caused by the rapid movement of the earth's rocky outer layer. Earthquakes occur when energy stored within the earth, usually in the form of strain in rocks, suddenly releases. This energy is transmitted to the surface of the earth by seismic waves.
Question 5
1 / -0

Match the following and choose the correct answer.
Table A Table B
a. Earthquake 1. Prevent leakage
b. Lightning 2. Fault zone
c. Insulation 3. Detection of charges
d. Electroscope 4. Earthing

A
a-2, b-4, c-1, d-3

B
a-3, b-4, c-2, d-1

C
a-4, b-3, c-2, d-1

D
a-1, b-2, c-3, d-4
Solution
- Fault zones are highly prone to earthquakes.
- Earthing is done to save buildings from lightning.
- Insulation is done on conducting wires to prevent charge leakage.
- Electroscopes are used to detect the presence of charges in a body.
So option (A) is correct.
Question 6
1 / -0

The epicenter is the point inside the earth where the earthquake originates

A
True

B
False

C
Ambiguous

D
Data insufficient

Solution

Answer is B.

The point within the earth along the rupturing geological fault where an earthquake originates is called the focus, or hypocenter. The point on the earth's surface directly above the focus is called the epicenter. Earthquake waves begin to radiate out from the focus and subsequently form along the fault rupture.
Hence, the statement is false.
Question 7
1 / -0

A seismograph is a scale used for measuring the magnitudes of earthquakes

A
True

B
False

C
Ambiguous

D
Data insufficient

Solution

A seismograph is an instrument that makes a record of seismic waves caused by an earthquake, explosion, or another Earth-shaking phenomenon. Seismographs are equipped with electromagnetic sensors that translate ground motions into electrical changes, which are processed and recorded by the instruments analog or digital circuits. A record produced by a seismograph on a display screen or paper printout is called a seismogram.
Earthquake is measured by the Richter scale.
Question 8
1 / -0

A lightning conductor:

A
conducts light

B
stops lightning

C
protect building from the damaging effects of lightning

D
none of these

Solution

The answer is option C.

As a storm cloud approaches, there is a conductive pathway established between the statically charged cloud and the lightning rod. The static charges gradually migrate along this pathway to the ground, thus reducing the likelihood of a sudden and explosive discharge.
Lightning conductors provide a low-resistance path to ground that can be used to conduct the enormous electrical currents when lightning strikes occur. If lightning strikes, the system attempts to carry the harmful electrical current away from the structure and safely to the ground. The system has the ability to handle the enormous electrical current associated with the strike.
Question 9
1 / -0

Directions For Questions

Write T against true and F against false in the following statements:

...view full instructions

Earthquakes can be predicted in advance

A
True

B
False

C
Ambiguous

D
Data insufficient

Solution

Answer is B.

Earthquakes are caused by by shaking of the earth, strain building up in the tectonic plates, plates slipping along the fault lines, etc.
Because we cant get deep enough into the Earth to see what happens before an earthquake happens, therefore we cant predict when its coming.
Although the causes of earthquakes is known, but no instrument could be invented to detect it till now. Hence, earthquakes cannot be predicted in advance.
Question 10
1 / -0

The adjoining figure shows a negatively charged electroscope. If a negatively charged rod is brought close to, but not touching, the knob, the two leaves will :

A
move closer together

B
move farther apart

C
not move at all

D
None of these

Solution

Answer is B.

In this case, the given electroscope is negatively charged. If a negatively charged rod is brought close to, but not touching, the knob, the two leaves will move far apart as the like charges repel each other.

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	Table A		Table B
a.	Earthquake	1.	Prevent leakage
b.	Lightning	2.	Fault zone
c.	Insulation	3.	Detection of charges
d.	Electroscope	4.	Earthing

Some Natural Phenomena Test - 10

Result

Some Natural Phenomena Test - 10

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SHARING IS CARING

Question 1

fault zone

eruption zone

explosive zone

sliding zone

Solution

Question 2

rain

electric discharge

wind

shaking of earth

Solution

Question 3

centre

epicenter

focus

origin

Solution

Question 4

shaking of the earth

strain building up in the tectonic plates

plates slipping along the fault lines

None of the above

Solution

Question 5

a-2, b-4, c-1, d-3

a-3, b-4, c-2, d-1

a-4, b-3, c-2, d-1

a-1, b-2, c-3, d-4

Solution

Question 6

True

False

Ambiguous

Data insufficient

Solution

Question 7

True

False

Ambiguous

Data insufficient

Solution

Question 8

conducts light

stops lightning

protect building from the damaging effects of lightning

none of these

Solution

Question 9

True

False

Ambiguous

Data insufficient

Solution

Question 10

move closer together

move farther apart

not move at all

None of these

Solution

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