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Federal (FBISE) · Chapter test · Free

9th Class General Science Chapter 10 Test10. Heat

30 marks · 40 minutes · 21 questions. Covers: 10. Heat.

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9th Class General Science Chapter 10 Test

9th Class · General Science · Federal (FBISE)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 30Time: 40 minutes

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

  1. Melting point of oxygen is:
    1. -200
    2. -219
    3. -112
    4. -77
  2. The temperature of 15°C is equal to:
    1. 15°F
    2. 51°F
    3. 59°F
    4. 100°F
  3. The melting point of water is as that of:
    1. boiling point
    2. freezing point
    3. condensation
    4. sublimation
  4. Which of the following is the thermal insulator?
    1. gold
    2. tungsten
    3. germanium
    4. asbestos
  5. The two dimensional thermal expansion in a material is called:
    1. linear expansion
    2. translational expansion
    3. area expansion
    4. volume expansion
  6. Heat is a form of:
    1. velocity
    2. mass
    3. force
    4. energy
  7. Which material shows least expansion for a given increase in temperature?
    1. solid
    2. liquid
    3. gas
    4. air
  8. The fastest way of transferring heat is the process of:
    1. radiation
    2. evaporation
    3. condensation
    4. convection
  9. Which of the following is not a unit of temperature?
    1. kelvin
    2. degree Fahrenheit
    3. degree Celsius
    4. calorie
  10. The Fahrenheit scale has _____ divisions between the freezing and boiling point of water:
    1. 32
    2. 100
    3. 180
    4. 212

Q2. Short questions (Attempt any 6 of 8 · 6 × 2 = 12)

  1. When you sit by a campfire how does its hot air heats you? Explain.
  2. On a cold winter morning, why does the metal of bike feels colder than the wooden handle of the door?
  3. Why you use sealing in the house? Give your answer in terms of heat and temperature.
  4. Can human emit heat? If yes, what would be the process of emitting heat?
  5. Earth’s core is a very hot place. What may be the process through which the inner heat comes out of the Earth?
  6. Define heat? Also give its unit.
  7. Do we feel the heat or the temperature? Explain.
  8. What makes heat rise? Elaborate.

Q3. Long questions (Attempt any 2 of 3 · 2 × 4 = 8)

  1. Compare the terms heat and the temperatures by explaining the similarities and differences between them.
  2. What is thermal expansion? Also discuss its types like linear, area and volume expansion.
  3. Why transfer of heat through radiation does not require medium? Explain.