Chapter 4: Heating & Cooling - Science Mcqs for Grade 8 - Set 5

1)   The instruments which are used to measure temperature are called

a. barometer
b. mercury
c. spectrometer
d. thermometer
Answer  Explanation 

ANSWER: thermometer

Explanation:
No explanation is available for this question!


2)   If one end of metal rod is heated the whole rod becomes hot due to

a. conduction
b. convection
c. radiation
d. expansion
Answer  Explanation 

ANSWER: conduction

Explanation:
No explanation is available for this question!


3)   When the substance cool off there is a decrease in

a. size of substance
b. vibrations
c. temperature
d. all of them
Answer  Explanation 

ANSWER: all of them

Explanation:
No explanation is available for this question!


4)   A metal ball which is passing through metal ring will not pass after

a. heating
b. freezing
c. constant conditions
d. accelerating
Answer  Explanation 

ANSWER: heating

Explanation:
No explanation is available for this question!


5)   The expansion and contraction among solid, liquids and gases the one which has greater tendency to expand is

a. solid
b. liquid
c. gas
d. molten
Answer  Explanation 

ANSWER: gas

Explanation:
No explanation is available for this question!


6)   Dull and black surfaces are heat's good

a. radiator
b. conductors
c. insulators
d. convectors
Answer  Explanation 

ANSWER: radiator

Explanation:
No explanation is available for this question!


7)   The poor conductors of heat are also termed as

a. heat insulators
b. thermal insulators
c. both a and b
d. heat conductors
Answer  Explanation 

ANSWER: both a and b

Explanation:
No explanation is available for this question!


8)   A breeze which is produced at night time when land loses more heat quickly is

a. land breeze
b. sea breeze
c. sand storm
d. thunderstorm
Answer  Explanation 

ANSWER: land breeze

Explanation:
No explanation is available for this question!


9)   The measure of hotness of an object is known as

a. volume
b. density
c. temperature
d. heat
Answer  Explanation 

ANSWER: temperature

Explanation:
No explanation is available for this question!


10)   When energy is passed from one particle to another through a medium is called

a. conduction
b. convection
c. radiation
d. expansion
Answer  Explanation 

ANSWER: conduction

Explanation:
No explanation is available for this question!


11)   When a substance gains heat the temperature

a. increases
b. decreases
c. remain same
d. stabilize
Answer  Explanation 

ANSWER: increases

Explanation:
No explanation is available for this question!


12)   Heat gain causes a metal to

a. expand
b. contract
c. shrink
d. stable
Answer  Explanation 

ANSWER: expand

Explanation:
No explanation is available for this question!


13)   The flow of cool air from the sea towards land produces a

a. land breeze
b. sea breeze
c. sand storm
d. thunderstorm
Answer  Explanation 

ANSWER: sea breeze

Explanation:
No explanation is available for this question!


14)   Vacuum is a

a. conductor
b. insulator
c. both a and b
d. best conductor
Answer  Explanation 

ANSWER: insulator

Explanation:
No explanation is available for this question!