CBSE Class 8 Science Sample Paper Set B. It’s always recommended to practice as many CBSE sample papers as possible before the examinations. The latest sample papers have been designed as per the latest blue prints, syllabus and examination trends. Sample papers should be practiced in examination condition at home or school and also show it to your teachers for checking or compare with the answers provided. Students can download the sample papers in pdf format free and score better marks in examinations. Refer to other links too for latest sample papers.
SECTION - A
1 Why is a bacterial cell regarded as a prokaryotic cell?
2 Suggest a method that we can use to prevent the depletion of Exhaustible Resources.
3 Give the direction of force of friction in the following cases
4 Give the scientific term for the following:
i) A male hormone. ii) Female gamete in human beings. iii)Cell produced after fertilization of gametes. iv)Part of the female reproductive system where fertilization takes place.
5 Amit wishes to buy a shirt.The shopkeeper shows him one shirt each of Cotton and Rayon.He decides to buy the cotton shirt.What are the two properties of cotton shirt thathe prefers over Rayon?
6 Explain what happens to the meteors when they enter the Earth’s atmosphere.
7 Discuss the various shapes of cells found in human body and give one example of each. (any 3 shapes).
8 Explain the process of Budding in Hydra with the help of a well labeled diagram.
9 How does the development of an adult frog take place from the eggs?
10 List any three changes that take place in males during adolescence.
11 a) What are sex chromosomes?
b) How is sex determined in human beings? Draw a flow chart to explain it.
12 Distinguish between Thermoplastics and Thermosetting Plastics on the basis of
a) Effect of heat b) Nature c) Toughness
13 a)Write the principle involved in the process shown in the given figure.
b)Label the parts A,B,C,D
14 “Ancient monuments get damaged due to acid rain every year”.With regard to the statement answer the following questions:
a)What is acid rain?
b)Name any two pollutants that lead to acid rain.
c)Mention any other damage caused by acid rain apart from the one given above.
15. a)What are fossil fuels?Write the two conditions needed for formation of fossil fuels.
b)Name the followingi)
Variety of Coal that has highest Carbon content.
ii)Petroleum product used for leveling the roads.
16 With the help of a diagram,explain the causes of friction. 3
17 Give reason for the followinga)
a)The handles of a motorcycle are covered with towel material or a rubber sheet with spikes
b)The kabaddi players rub their hands with sand before playing
c)The shape of the aircrafts is streamlined
18 An object makes 20 vibrations in 4 seconds.Calculate the following for the vibration of the object:
ii)time period iii)Will the sound produced by this object be audible to human ears?Give a reason for your answer.
19 a)What is noise pollution?
b)Name any two sources of noise pollution.
c)Suggest two methods of controlling noise pollution.
20 a)Differentiate between a plant cell and an animal cell on the basis of
i-Presence of cell wall
ii-Size of Vacuole
iii-Presence of Plastids
b)Label the parts A,B,C,D in the given diagram.
23 Justify the following statementsi)
i) Plastic containers are best suited for storing dry fruits
ii) Wastes like fruit and vegetable peelings should be thrown into green bins.
iii) Nylon clothes dry faster than cotton clothes
iv) Petroleum is regarded as ‘Black Gold’
v) We should not sleep near the fire place in a closed room during winters.
24 Observe the given diagram of human ear .Label the parts A,B,C,D,E and write the role played by each part in the process of hearing.
SECTION - B
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