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CBSE Class 8 Science Worksheet

Some Natural Phenomena

1.
State True or False: Bathing outdoors should be avoided during thunderstorm.
A) 1 B) 0
2.
Choose the correct answer: Instrument used to measure earthquake is ___________.
A) polygraph B) barometer C) pyrometer D) Seismograph
3.
State True or False: The plates of the outermost layer of the Earth are always in continuous motion.
A) 1 B) 0
4.
Fill in the blanks: When a body losses charge to the Earth, then it is called ___________.
5.
Write two places in India which are most threatened by earthquake.
6.
Fill in the blanks: The wave produced by tremors are _____________ waves.
7.
Which scale is used to measure the power of an earthquake?
A) Kelvin scale B) Decibel scale C) Richter scale D) None of these
8.
Write one advantage of lightning.
9.
Choose the correct answer: Major earthquakes are less likely to occur in ____________.
A) North East India B) The Himalayan region C) Orissa
 D) Rann of Kutch
10.
Which of the following is not a safe place during lightning?
A) open field B) elevated ridge C) inside building D) None of these
11.
State True or False: Like charges repel each other.
A) 1 B) 0
12.
How many times a magnitude of 2 of earthquake on Richter is greater than magnitude of 1?
A) Two times B) Ten times C) Hundred times D) None of these
13.
What are the natural phenomena caused by earthquake?
14.
Fill in the blanks: __________ charge is acquired by silk cloth when glass rod is rubbed with silk cloth.
15.
Choose the correct answer: The plate of earth which is responsible for causing earthquake is the _____________.
A) crust B) mantle C) outer core D) inner core
16.
Choose the correct answer: The outermost layer of the Earth is ___________.
A) Outer Core B) Crust C) Mantle D) Inner Core
17.
Fill in the blanks: When charges move they constitute ____________ current.
18.
Choose the correct answer: The state where earthquakes are more likely to occur is _________.
A) Karnataka B) Tamil Nadu C) Gujrat D) Orrisa
19.
Choose the correct answer: Lightning occurs due to ______________.
A) rain B) electric discharge C) wind D) None of these
20.
What happens when amber is rubbed with fur?

CBSE Class 8 Science Worksheet

Some Natural Phenomena

Answers

1.
Option A
2.
Option D
3.
Option A

4.
discharge
5.
(i) Kashmir (ii) Rann of Kutch
6.
seismic
7.
Option C

8.
It enables ozone to be formed from oxygen.
9.
Option C
10.
Option B
11.
Option A
12.
Option B

13.
Tsunami, floods and landslides
14.
Negative
15.
Option C
16.
Option B

17.
electric
18.
Option C
19.
Option B

20.
Amber will attract light objects like pieces of pear.
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