1
marks
Q.1
Tadpoles develop into ---------------
Q.2
The different stages in the life cycle of a frog are
·
Egg
Larva
Pupa
Egg Larva
Pupa
Larva Pupa
Adult
·
Egg Larva
Adult
Egg Larva
Adult
Q.3
What is the nature of the charges generated due to rubbing?
Q.4
In which medium among wood and water, will the sound travel faster?
Q.5
What happens when we press a rubber ball placed on a table?
Q.6
What is a natural satellite?
2Marks
Q.1
(i) What are petrochemicals?
(ii) Why petroleum is called black gold?
(ii) Why petroleum is called black gold?
Q.2
Define refining of petroleum. Where it is carried out?
Q.3
What is an embryo? Where does the development of a human embryo take place?
Q.4
We can easily charge non-metals like rubber, woollen clothes, plastics, etc.
whereas we cannot charge a copper rod by rubbing easily. Why?
Q.5
Write the following voices having different frequencies in the increasing order
of their frequencies : (i) voice of a child, (ii) voice of an adult male, (iii)
voice of an adult woman.
Q.6
Give reason for
(i) Change in seasons on the earth
(ii) Different phases of moon.
(i) Change in seasons on the earth
(ii) Different phases of moon.
3 marks
Q.1
How petroleum is mined from their deposits?
Q.2
Why should we use the fossil fuels economically and wisely?
Q.3 Discuss the steps that occur during sexual
reproduction.
Q.4
Suggest three measures to protect ourselves from lightning.
Q.5
Give reason:
(i)
During a thunderstorm, we see the lightning first and then hear the thunder.
(ii) We
do not hear the supersonic jets when they approach us, but hear a sudden boom
after it has passed away.
Q.6
Give one word for each
(a) Stars forming a recoginsable pattern
(a) Stars forming a recoginsable pattern
(b)
A solid body from outer space that is sometimes able to reach the earth’s
surface
(c) A belt of small planetoids present mainly in between the orbits of Mars and Jupiter.
(c) A belt of small planetoids present mainly in between the orbits of Mars and Jupiter.
5Marks
Q.1
What is carbonisation? Name three products obtained after the processing of
coal. Also mention their uses.
Q.2
What is binary fission? Name the organism in which the binary fission is a
method of reproduction.
Q.3
What are the causes of earthquake? Explain briefly two hazards caused by an
earthquake.
Q.4
What do you understand by the term noise pollution? Suggest some ways of
minimising noise pollution.
Q.5With
the help of diagram, show the relative positions of prominent stars in
(a) Ursa major and
(b) Orion.
(a) Ursa major and
(b) Orion.
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