CBSE Class 8 Science Sample Paper Set 24

CBSE Class 8 Science Sample Paper Set X.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. 

1. Choose the correct option. 

a) The Development of foetus takes place in ____________.

i) ovary ii) oviduct iii) uterus iv) none of these

b) iodine is essential for the production of the harmone _________.

i) thyroxine ii) insuline iii) growth iv) testosterone

c) Which of the following is NOT the example of non contact force.

i) Gravitational force ii) Muscular force iii) Magnetic force iv) Electrostatic force

d) Material on which electroplating has to be done must be _____________.

i) Negative Electrode ii) Positive Electrode iii) Neutral iv) May be Positive or Negative

e) Among the following which is the safest place to take shelter during thunderstorm

i) under a huge tree ii) under an umbrella iii) inside a car iv) In an open space

f) Which of the following constellation is also known as “The hunter”.

i) Great Bear ii) Orion iii) Cassiopeia iv) Leo Major

g) CFC (Chlorofluorocarbons) are used in_________.

i) refrigerator ii) AC iii) Aerosol spray iv) All the above

h) Image formed by a plane mirror is_______________________________________.

i) Virtual, behind the mirror and enlarged.

ii) Virtual, behind the mirror and of the same size as the object.

iii) Real at the surface of the mirror and enlarged.

Iv) Real behind the mirror and of the same size as the object.

Iv) Real behind the mirror and of the same size as the object

i) Light Year is the unit of __________________.

i) time ii) mass iii) distance iv) volume

j) The metal used to give shiny appearance to objects like bicycle handlebars & wheel rims is ________________.
i) Chromium ii) Zinc iii) Copper iv) Tin.

2. Answer the following very briefly. (1 X 9=9)

a) What is binary fission?

b) Why are endocrine glands termed as ductless glands ?

c) A Blacksmith hammers a hot piece of iron while making a tool. How does the force due to hammering affect the iron piece?

d) Which effect of the current allows the bulb to glow?

e) Why a charged body loses its charge if we touch it with our hand?

f) Name two objects other than planets which are the members of the solar system.

g) Which gases are mainly responsible for acid rain?

h) What is an electroscope?

i) Name the system used by visually challenged people for reading.

3. Answer the following briefly. (2 X 10=20)

a) What is smog? What are its harmful effects?

b) How can you locate the pole star with the help of Ursa Major.

c) Name the scale on which the destructive energy of Earthquakes is measured. List two states in India where earthquake are more likely to strike.

d) Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpour? Explain.

e) Why are shoulder-bags provided with broad straps?

f) It is easier to write with a ball point pen than a nib pen. Why?

g) Why does the voice of boys become hoarse during puberty?

h) What is metamorphosis? Name an organism that undergoes metamorphosis.

i) Give one example each of situations in which you push or pull to change the state of motion of objects.

j) What are oviparous and viviparous animals?

4. Answer the following. (3 X 7=21)

a) What are artificial satellites? What are they used for?

b) In the given figure the angle between incident rays and the mirror is 500. Find the angle of reflection by applying the law of reflection.

c) How does the earthquake occur?

d) A child staying in the coastal region tests the drinking water and also the sea water with his tester. He finds that the compass needle deflects more in the case of sea water. Can you explain the reason?

e) What is atmospheric pressure? Why we are not crushed under it?

f) Differentiate between Zygote and Foetus (3Points).

g) How do lubricants reduce friction? Give an example where we deliberately reduce friction.

5. Answer the following in detail. (5 X 4=20)

a) Is friction a friend or a foe? Justify your answer by giving two examples each.

b) Describe the process of sex determination in human beings ?

c) Explain “Green House Effect”. How does it cause global warming?

d) Draw a neat labeled diagram of human eye. Mention two ways to take care of your eyes.

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