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
Dark coloured clothes are preferred in winter because it
  • A
    Absorbs the heat and light
    Correct
  • B
    Reflect the heat and light
  • C
    Looks good during winter
  • D
    Light and warm
2
Mercury levels falls easily in
  • A
    Laboratory thermometer
    Correct
  • B
    Clinical thermometer
  • C
    Fahrenheit thermometer
  • D
    Degree Celsius thermometer
3
We feel cooler after sweating because of
  • A
    Moisture
  • B
    Evaporation
    Correct
  • C
    Transpiration
  • D
    Conduction
4
Mercury levels falls easily in laboratory thermometer because
  • A
    Mercury melts at high temperature
  • B
    Temperature is high
  • C
    Mercury is a thin liquid
  • D
    Kink is absent
    Correct
5
Mode of transfer of heat in which medium is not get heated is
  • A
    Evaporation
  • B
    Convection
  • C
    Conduction
  • D
    Radiation
    Correct
6
The bottom of stainless steel pan have copper because
  • A
    Copper is more attractive
  • B
    Copper is better conductor
    Correct
  • C
    Copper is easier to clean
  • D
    Copper is more durable
7
Hotness and coldness are
  • A
    Comparative to other object
    Correct
  • B
    Same as surround
  • C
    Same as the hotter object
  • D
    Same as the colder object
8
In Fahrenheit scale range is
  • A
    74 - 100 degree
  • B
    94 -108 degree
    Correct
  • C
    84 - 102 degree
  • D
    58 - 150 degree
9
Handles of metallic kettle is covered with strips of cane because can is
  • A
    More durable
  • B
    Appear beautiful
  • C
    Bad conductor of heat
    Correct
  • D
    Good conductor of heat
10
Ultimate source of all energy is
  • A
    Wood
  • B
    Petroleum
  • C
    Sun
    Correct
  • D
    Coal
11
We can not always relay on our sense organs to decide hotness or coldness because
  • A
    Hot and cold is comparative
    Correct
  • B
    Sense organs are not reliable
  • C
    Hotness can not be detected by sense organs
  • D
    Coldness can not be decided by sense organs
12
The thermometer that measure our body temperature is
  • A
    Laboratory thermometer
  • B
    Gas thermometer
  • C
    Mercury thermometer
  • D
    Clinical thermometer
    Correct
13
Water and air get heated by the process of
  • A
    Radiation
  • B
    Transfusion
  • C
    Conduction
  • D
    Convection
    Correct
14
If the temperature in Kelvin scale is 320 than its value in Celsius scale is
  • A
    145\(^0{\text{C}}\)
  • B
    45\(^0{\text{C}}\)
  • C
    27\(^0{\text{C}}\)
  • D
    47\(^0{\text{C}}\)
    Correct
15
Which precaution is essential while measuring the body temperature using a thermometer?
  • A
    Keep the thermometer upright
  • B
    Keep thermometer in refrigerator
  • C
    Ensure the mercury levels below 35\(^0{\text{C}}\).
    Correct
  • D
    Ensure body is clean