List of top Questions asked in CBSE Class VIII

In a model of a ship, the mast is 9 cm high, while the mast of the actual ship is 12 m high. If the length of the ship is 28 m, how long is the model ship?
Choose the correct option.
Image formed by a plane mirror is
Choose the correct option.
Angle of incidence is equal to the angle of reflection.
Fill in the blanks in the following.
1. A person 1 m in front of a plane mirror seems to be ___ m away from his image.
2. If you touch your ___ ear with right hand in front of a plane mirror it will be seen in the mirror that your right ear is touched with ___.
3. The size of the pupil becomes ___ when you see in dim light.
4. Night birds have ___ cones than rods in their eyes.
Discuss the effects of deforestation on the following.
  1. Wild animals 
  2. Environment 
  3. Villages (Rural areas) 
  4. Cities (Urban areas) 
  5. Earth 
  6. The next generation
Describe an activity to show that the incident ray, the reflected ray and the normal at the point of incidence lie in the same plane.
State the laws of reflection.
A photograph of a bacteria enlarged 50,000 times attains a length of 5 cm. What is the actual length of the bacteria? If the photograph is enlarged 20,000 times only, what would be its enlarged length?
Fill in the blanks.
  1. A place where animals are protected in their natural habitat is called ____ .
  2. Species found only in a particular area is known as ____ .
  3. Migratory birds fly to far away places because of ____ changes.
A machine in a soft drink factory fills 840 bottles in six hours. How many bottles will it fill in five hours?
A mixture of paint is prepared by mixing 1 part of red pigments with 8 parts of base. If 1 part of a red pigment requires 75 mL of base, how much red pigment should we mix with 1800 mL of base?
A mixture of paint is prepared by mixing 1 part of red pigments with 8 parts of base. In the following table, find the parts of base that need to be added.
Parts of red pigment1471220
parts of base8…………
Tick True/False against the following statements.
  1. Fossil fuels can be made in the laboratory.           (T/F)
  2. CNG is more polluting fuel than petrol.                  (T/F)
  3. Coke is almost pure form of carbon.                       (T/F)
  4. Coal tar is a mixture of various substances.          (T/F)
  5. Kerosene is not a fossil fuel.                                     (T/F)
Do you think the Indian princes were short-sighted in their approach to the events of 1757?
Which picture, according to you, reveals the first sparks of the fire of revolt?
Who is an artisan? Why do you think the artisans suffered? (picture 3)
In picture 2 what do you understand by the Company’s “superior weapons”?
Lightning and thunder take place in the sky at the same time and at the same distance from us. Lightning is seen earlier and thunder is heard later. Can you explain why?
Your parents are going to buy a house. They have been offered one on the roadside and another three lanes away from the roadside. Which house would you suggest your parents should buy? Explain your answer.
A rocket has been fired upwards to launch a satellite in its orbit. Name the two forces acting on the rocket immediately after leaving the launching pad.
Name the forces acting on a plastic bucket containing water held above ground level in your hand. Discuss why the forces acting on the bucket do not bring a change in its state of motion.
A blacksmith hammers a hot piece of iron while making a tool. How does the force due to hammering affect the piece of iron?
If Tilly’s award was to be shared, who do you think she should share it with — her parents or her geography teacher?
How are Meghna and Almas’s stories similar?
What is the difference between noise and music? Can music become noise sometimes?