Class 7 Heat CBSE Questions & Answers

Class 7 · Heat

This is Science Class 7 Heat CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
The heat in metals is conducted by the process of
  • A
    Absorption
  • B
    Radiation
  • C
    Convection
  • D
    Conduction
    Correct
2
Glass, plastic, wood are examples of
  • A
    Radiators
  • B
    Insulator
    Correct
  • C
    Convectors
  • D
    Conductor
3
During the night
  • A
    Land heats up
  • B
    Land cools more quickly than the sea
    Correct
  • C
    Sea water heats up
  • D
    Sea cools quickly than the land
4
Freezing point of water is
  • A
    4\(^0{\text{C}}\)
  • B
    20\(^0{\text{C}}\)
  • C
    0\(^0{\text{C}}\)
    Correct
  • D
    10\(^0{\text{C}}\)
5
Temperature is measured with the help of
  • A
    Barometer
  • B
    Thermometer
    Correct
  • C
    Ammeter
  • D
    Voltmeter
6
Thermos flask keeps hot liquid hot and cold liquid cold by
  • A
    Cooling
  • B
    Preventing heat loss
    Correct
  • C
    Using coolant
  • D
    Heating
7
Heat of sun reaches to earth by
  • A
    Radiation
    Correct
  • B
    Conduction
  • C
    Through air.
  • D
    Convection
8
Clinical thermometer has marking from 35\(^0{\text{C}}\) to
  • A
    32\(^0{\text{C}}\)
  • B
    62\(^0{\text{C}}\)
  • C
    52\(^0{\text{C}}\)
  • D
    42\(^0{\text{C}}\)
    Correct
9
Conduction takes place in
  • A
    Gases only
  • B
    All of the above.
  • C
    Liquid only
  • D
    Solid only
    Correct
10
Ventilation in room is due to
  • A
    Both radiation and conduction
  • B
    Radiation
  • C
    Conduction
  • D
    Convection
    Correct
11
Method of heat transfer in steel rod is
  • A
    Convection
  • B
    Conduction
    Correct
  • C
    Radiation
  • D
    All of these
12
Temperature changes with change in
  • A
    Velocity
  • B
    Magnitude
  • C
    Heat energy
    Correct
  • D
    Vibration
13
Which of the following is a insulator
  • A
    Air
    Correct
  • B
    Graphite
  • C
    Aluminium rod
  • D
    Copper rod
14
Normal body temperature is
  • A
    27\(^0{\text{C}}\)
  • B
    17\(^0{\text{C}}\)
  • C
    37\(^0{\text{C}}\)
    Correct
  • D
    39\(^0{\text{C}}\)
15
A wooden spoon is dipped in cup of ice-cream, its other end
  • A
    Become cold by convection
  • B
    Become cold by radiation
  • C
    Does not become cold
    Correct
  • D
    Become cold by conduction