Chapter 4: Heating & Cooling - Science Mcqs for Grade 8 - Set 1

1)   In SI unit of temperature is

a. Degree C
b. F
c. K
d. Ampere
Answer  Explanation 

ANSWER: K

Explanation:
No explanation is available for this question!


2)   A very good conductors of heat contains

a. metals
b. non-metals
c. liquids
d. gases
Answer  Explanation 

ANSWER: metals

Explanation:
No explanation is available for this question!


3)   Materials trapped air by fur, feathers, wool and sawdust are heat

a. insulators
b. conductors
c. gainers
d. losers
Answer  Explanation 

ANSWER: insulators

Explanation:
No explanation is available for this question!


4)   A solar panel is kept black surface so that it absorbs more

a. heat
b. water
c. air
d. oxygen
Answer  Explanation 

ANSWER: heat

Explanation:
No explanation is available for this question!


5)   Water freezes at

a. 98 C
b. 100 C
c. 97 C
d. 0 C
Answer  Explanation 

ANSWER: 0 C

Explanation:
No explanation is available for this question!


6)   Railway tracks have gaps between them to deal with expansion in

a. hot days
b. cold days
c. winters
d. snow fall
Answer  Explanation 

ANSWER: hot days

Explanation:
No explanation is available for this question!


7)   Heat loss may help the matter to

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

ANSWER: contract

Explanation:
No explanation is available for this question!


8)   A joint which is made between adjoining rails to expand without bending is called

a. rail joint
b. sliding joint
c. expansion joint
d. contraction joint
Answer  Explanation 

ANSWER: sliding joint

Explanation:
No explanation is available for this question!


9)   In melting of ice cube the heat gain

a. melts ice
b. increase temperature
c. gain energy
d. release energy
Answer  Explanation 

ANSWER: melts ice

Explanation:
No explanation is available for this question!


10)   Mercury is

a. harmless
b. safe
c. non-toxic
d. poisonous
Answer  Explanation 

ANSWER: poisonous

Explanation:
No explanation is available for this question!