CBSE Class 8 Science Sample Paper Set 22

CBSE Class 8 Science Sample Paper Set V.Sample Papers are the very important for every student. The sample papers should be practiced to gain extra marks in examinations. The sample papers have been prepared based on summative assessment1 and summative assessment 2 pattern. The sample papers have been prepared based on pattern of last year examinations and as per latest changes in the syllabus. Students, teachers and parents can download all CBSE educational material and very well prepared worksheets from this website.  All CBSE educational material is developed by our panel of teachers, have also been submitted by CBSE teachers and students. 

Section –A

CHEMISTRY

1. Combustible substance burns to produce 

a) heat

b) light

c) both heat and light

c) only (a)

2. Fibre which is also called as artificial silk 

a) Nylon

b) Rayon

c) Terylene

c) Acrylon

3. The chemical method of purification of water is 

a) boiling

b) Chlorination

c) filtration

d) all of these

4. Name the regenerated fibre.Why is it so called? 

5. Give one example of each thermosetting and thermoplastic. 

6. How molecular arrangement of thermoplastic is is different from thermosetting plastics?

7. How can we recognize the presence of pollutants in water? Give any two points

8. Give two measures to check pollution by industrial waste. 

9. State two characteristics of synthetic plastics. 

10 (a) What should we use in case of fire produced by kerosene?

(b) Why is water not used in controlling electrical fires? 

11. Describe an activity which illustrate that non luminous zone is the hottest zone of a candle flame. 

             OR

Give reason:

(a) A matchstick can be lighted by striking the match along a rough surface.

(b) We can boil water in a paper cup.

(c) Flame of burning candle goes off, when we blow over it strongly.

12. (a) What causes depletion of oxygen in water?

(b) How does it affect aquatic life? 

13. (a) What is spontaneous combustion? Give one example of each. explosive combustion and rapid combustion

(b) Why do the goldsmith use the outer most zone of the burning flame.
(c) Paper by itself catches fire easily whereas a piece of paper wrapped an aluminum pipe does not. Why?
(d) Why are gaseous fuels are considered the best? Give any two reasons

14. (a) What is polymer?
(b) Name the first fully synthetic fibre.
(c) Give one use of each-Nylon , Terylene
(d) Write two characteristics of synthetic fibres which make them
Popular dress materials.

BIOLOGY:
MCQ

1 Budding is a common mode of reproduction in
a) Spirogyra
b) Yeast
c) Amoeba
d) Plasmodium

2 What is the function of Thyroxine.
a) To regulate the metabolic rate
b) Mentain glucose level
c) Mentain protein level
d) Mentain glycogen leve

3 Mention any two functions of Adrenal gland. 

4 Discuss the types ?category of chromosomes present in each cell.
Differentiate between menarche and menopause.

5 List down any four changes seen during the puberty of male and female.

6 What do you mean by Endocrine system?
What is the function of Insulin?

7 Draw a well labeled diagram of a male reproductive system.
Define Metamorphosis.

8 Distinguish between internal and external fertilization.
List down name of any four methods to increase the fertility of the soil.
Draw a small equipment that is used by poor farmer for manually removing the weeds.

9 Define the term

a)winnowing

b) Lodging

c) tilling

d) agriculture

e) broadcasting

PHYSICS:

1 Define Refractive Index. 

2 What is a Noise Pollution? 

3 What are Meteors and Meteorites? Define. 

4 Define Refraction of light. What is a cause of refraction? 

5 What are Planets and Stars? Define. 

6 Write the three rules for the formation of images by a convex lens. 

7 What are constellations? Explain Ursa Major and Ursa Minor with the help of diagrams.

8 Explain the working of a Human Ear with the help of a labeled diagram.

9 Explain the working of important parts of human eye (with the help of labeled diagram.)

10 What is a Rainbow? Explain its formation. 

11 What is a converging lens? Draw the ray diagrams for it:
(a) When the object is placed between F and O.
(b) When the object is placed between F & 2F.

12 What are the two main types of defects of vision? Explain each of them and their correction with the help of a ray diagram.

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