8th Standard CBSE Syllabus & Materials
8th Standard CBSE
CBSE 8th Social Science Theme D - Factors of Production - New Model Questions Papers Study Material - QB365 Set A
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CBSE 8th Social Science Theme C - Universal Franchise and India's Electoral System - New Model Questions Papers Study Material - QB365 Set A
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CBSE 8th Social Science Theme B - The Rise of the Marathas - New Model Questions Papers Study Material - QB365 Set A
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CBSE 8th Social Science Theme B - Reshaping India's Political Map - New Model Questions Papers Study Material - QB365 Set A
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CBSE 8th Social Science Theme A - Natural Resources and Their Use - New Model Questions Papers Study Material - QB365 Set A
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CBSE 8th Science Keeping Time with Skies - New Model Questions Papers Study Material - QB365 Set A
Published on: 29/10/2025
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Questions + Answers key
Take MCQ Science Test
1.
________ does not corrode easily.
2.
The muscles attached to the eye lens make it thicker to see _________ objects.
3.
Water which is suitable for ______ is called _______water
4.
While______your teeth, leaving the______ running may waste several_________of water.
5.
CFCs deplete the______
6.
Electroplating of.............is done on objects like water taps and cycle bell to give them a shiny appearance.
7.
__________ are minor planets that revolve around the Sun and are located between Mars and Jupiter.
8.
________ are bright objects that revolve around the Sun.
9.
Night birds have __________ cones than rods in their eyes.
10.
The planet which appears reddish in colour is ______
11.
Paheli wants to deposit silver on an iron spoon. She took silver nitrate (AgNO3) solution in a beaker and set up a simple circuit for electroplating. Which terminal of the battery should the spoon be connected to? What material should the other electrode be made of?
12.
Boojho made the circuit as shown in figure. He wanted to observe what happens when an electric current is passed through water. But he forgot to add a few drops of lemon juice to water. Will it make any difference to his observations? Explain
13.
Explain how could we can see the hair at the back of your head.
14.
Eyes of the nocturnal birds have large cornea and a large pupil. How does this structure help them?
15.
Draw sketches to show the relative positions of prominent stars in
(a) Ursa Major (b) Orion
16.
Draw a labelled sketch of human eye.
17.
What kind of lens is thicker in centre?
18.
The quality of air at various locations is monitored regularly by government and other agencies. In what way can you use these data?
19.
A phenomenon that occurs naturally benefits life on the earth. The excess of it causes global warming. Name the phenomenon.
20.
Light travels fastest in vacuum. Why?
21.
What is LED?
22.
Since, when an electric current is passed through two solutions A and B, the bulb glows brightly for solution B and dimly for solution A. So, which of the two is a better conductor?
23.
Explain, why is a layer of zinc coated over iron.
24.
Imagine that parallel rays are incident on an irregular surface. Are the rays reflected from this surface parallel to each other?
25.
Why does the moon change its shape daily?
26.
If I am 13 years old, how many times have I gone around the sun?
27.
Can we read the distance of nearest star from the Earth conveniently?
28.
Can any life exist on the moon?
29.
An Indian holy river is among the ten most endangered rivers list of WWF. Which is it? How is the water of this river polluted?
30.
What is the ill effect of electroplating?
31.
At what angles are mirrors inclined in a kaleidoscope and a periscope respectively?
32.
What is Kyoto Protocol?
33.
What steps are taken by the Supreme Court to save Taj Mahal?
34.
Brightest star in the sky.
35.
Other name of Ursa Major
1.
( )
plastic
2.
( )
Under special conditions
3.
( )
drinking,potable
4.
( )
Brushing,tap,litres
5.
( )
ozone
6.
( )
chromium
7.
( )
Asteroids
8.
( )
Planets
9.
( )
lesser
10.
( )
Mars
11.
Spoon should be connected to the negative terminal of the battery. The other electrode should be of silver so that silver ions get deposited on an iron spoon.
12.
Adding few drops of lemon juice in water will increase the conductivity of the solution. The current will flow in both the cases but adding of lemon juice makes easy the current to flow.
13.
With the help of two plane mirrors, we could see the hair at the back of your head. One mirror to the front side and another mirror is to the back of head slightly above the level of head, and the mirror should also bend slightly towards the head.
14.
The size of the eyes of nocturnal bird is large. Large eyes with a wider pupil, larger lens and increased retinal surface can collect more ambient light which help them to see the objects even at night easily.
15.
Sketches are shown as given below:
16.
17.
Convex lens is thicker in centre.
18.
The quality of air at various locations is monitored regularly by government and other agencies. These data can be used to generate awareness about air pollution among people.
19.
The phenomenon is greenhouse effect
20.
Light travels fastest in vacuum than any other medium because there is no obstruction to the passage of light in vacuum.
21.
LED is a device or bulb which even glows at low or small current.
22.
As per the question, solution B is a better conductor.
23.
Layer of zinc is coated over iron because zinc prevents it from rust and corrosion.
24.
No, the reflected rays from irregular surface are in different directions.
25.
Moon changes its shape daily because it revolves around the Earth and the light from the sun continuously changes due to the presence of Earth between moon and the Sun.
26.
13 times, because the earth makes 1 revolution around the sun in 1 year.
27.
No, the nearest star alpha Centauri is at a distance 40000000000000 km from the Earth. So, they can be expressed in light year.
28.
No, because there is no atmosphere and water on the moon.
29.
The Ganga is the Indian holy river that is amongst the ten most endangered rivers list of WWF. The water has been highly polluted because the towns and cities through which the river flows, throw huge quantities of garbage, untreated sewage, dead bodies and many other harmful things, directly into the river. In fact, the river is dead at many places where the pollution levels are extremely high.
30.
( )
The used conducting solution causes pollution
31.
( )
Kaleidoscope - 60°
Periscope - 45°
32.
( )
Kyoto Protocol is an agreement to reduce the emission of green house gases.
33.
( )
It has ordered industries to switch to cleaner fuels like CNG and LPG. The automobiles should switch over to unleaded petrol in Taj zone
34.
( )
Venus.
35.
( )
Saptarishi
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