oly class-7 science set-2 – The Smart Visions

Created on April 02, 2025

Olympiad Class-7 Science Set-2

NameEmailPhone NumberSelect Level / Class

1 / 25

Which type of clothes do we prefer to wear
in summer according to NCERT?

A) Light-coloured

B) Dark-coloured

C) Thick

D) Woolen

2 / 25

Why do people living in coastal areas
experience sea breezes?

A) The sea is always cooler than the land

B) The land is hotter during the night

C) The land heats up and cools down more quickly than the sea

D) The sea absorbs heat more quickly than the land

3 / 25

Which material is a poor conductor of heat?

A) Iron

B) Wool

C) Copper

D) Aluminium

4 / 25

What is the primary reason woollen clothes
keep us warm?

A) They trap air

B) They are made from animal fibres.

C) They are thick

D) They are tightly woven.

5 / 25

What prevents the mercury level from
falling in a clinical thermometer when
removed from the mouth?

A) The bulb

B) The scale

C) The kink

D) The glass tube

6 / 25

Why should a clinical thermometer not be
used to measure high temperatures?

A) It can break easily

B) It is not accurate enough

C) It does not have a high enough range

D) It can melt

7 / 25

What phenomenon explains why hot water
rises?

A) Expansion

B) Radiation

C) Conduction

D) Convection

8 / 25

What is a land breeze?

A) Hot air rising over the sea

B) Air moving from the sea to the land

C) Cool air moving from the land to the sea at night

D) Warm air moving from the land to the sea

9 / 25

Which of the following is not a method of
heat transfer?

A) Radiation

B) Conduction

C) Compression

D) Convection

10 / 25

What is advised to wear in summer to keep
cool?

A) Light coloured clothing

B) Tight clothing

C) Thermal wear

D) Dark coloured clothing

11 / 25

Why are light-coloured clothes more
comfortable in the summer?

A) They are generally looser

B) They do not absorb heat

C) They absorb more heat

D) They reflect most of the heat

12 / 25

What is the normal body temperature in
Celsius?

A) 37⁰C

B) 30⁰C

C) 35⁰C

D) 42⁰C

13 / 25

What causes convection currents in water?

A) Hot water rising and cold water sinking

B) All parts of the water heating up at the same rate

C) Water heating up uniformly

D) Cold water rising to the surface

14 / 25

What happens to the water at the bottom of
a flask when heated from below?

A) It rises

B) It cools down

C) It evaporates

D) It condenses

15 / 25

What type of heat transfer is experienced
when you feel the heat from a fire without
touching it?

A) Convection

B) Conduction

C) Reflection

D) Radiation

16 / 25

Which material is considered a good
conductor of heat?

A) Wool

B) Plastic

C) Wood

D) Copper

17 / 25

What device is used to measure
temperature?

A) Calorimeter

B) Hygrometer

C) Thermometer

D) Barometer

18 / 25

Which scale is used in India for measuring
temperature as mentioned in the NCERT
textbook?

A) Celsius

B) Kelvin

C) Fahrenheit

D) Rankine

19 / 25

Which phenomenon explains why it is
cooler at the seaside during the day?

A) Land breeze

B) Sea breeze

C) Radiation

D) Conduction

20 / 25

What is the purpose of the kink in a clinical
thermometer?

A) To prevent mercury from falling back

B) To increase the accuracy of the reading

C) To keep the thermometer straight

D) To prevent mercury from rising too high

21 / 25

Heat transfer that does not require a
medium is called?

A) Convection

B) Conduction

C) Radiation

D) Reflection

22 / 25

Which part of the clinical thermometer
contains mercury?

A) The bulb

B) The tube

C) The cap

D) The scale

23 / 25

What is an insulator?

A) A device used to measure temperature

B) A material that does not allow heat to pass through easily

C) A material that allows heat to pass through easily

D) A type of thermometer

24 / 25

What does a sea breeze bring?

A) Cool air from the sea during the night

B) Warm air from the sea during the day

C) Moisture from the sea

D) Hot air from the land

25 / 25

How do insectivorous plants obtain
nutrients?

A) Through photosynthesis

B) From the soil

C) From water

D) From the insects they trap

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