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CBSE Class 9 Matter in Our Surroundings — practice questions — page 2

Explore 57 free Matter in Our Surroundings questions in CBSE Class 9 Science. Open each question or exercise to read its content, reference answers and available explanation.

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Matter in Our Surroundings questions and exercises with answers

Showing questions 31–57 of 57.

Heat absorbed without a rise in temperature is called:Read the answer and worked solution →The heat needed to melt 1 kg of a solid at its melting point is the:Read the answer and worked solution →The temperature at which a liquid starts boiling is its:Read the answer and worked solution →Boiling is described as which kind of phenomenon?Read the answer and worked solution →The boiling point of water is:Read the answer and worked solution →Steam holds more energy than water at the same temperature due to:Read the answer and worked solution →A change directly from solid to gas is called:Read the answer and worked solution →A change directly from gas to solid is called:Read the answer and worked solution →The SI unit of temperature is the:Read the answer and worked solution →To change Celsius into Kelvin you must:Read the answer and worked solution →Change of a liquid into vapour below its boiling point is:Read the answer and worked solution →Evaporation is described as which kind of phenomenon?Read the answer and worked solution →Spreading clothes out to dry increases which factor?Read the answer and worked solution →The amount of water vapour present in air is called:Read the answer and worked solution →The rate of evaporation increases with a decrease in:Read the answer and worked solution →Match each change to its nameRead the answer and worked solution →True or false about matterRead the answer and worked solution →Does it speed evaporation up or slow it?Read the answer and worked solution →Fill the gaps on states of matterRead the answer and worked solution →Sort each idea by what it concernsRead the answer and worked solution →Order what happens as ice is heatedRead the answer and worked solution →Spot the one that does not fitRead the answer and worked solution →Pick the right answer, quicklyRead the answer and worked solution →Match each state of matter with its kinetic particulate characteristic:Read the answer and worked solution →Match each phase change process with its thermal definition:Read the answer and worked solution →Match each factor affecting evaporation rate with its influence:Read the answer and worked solution →Match each separation technique with the mixture it resolves:Read the answer and worked solution →

Worked practice questions

Heat absorbed without a rise in temperature is called:

  1. Laterite heat
  2. Latent heat
  3. Latitude heat
  4. Lattice heat
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Correct answer: B. Latent heat

1. The word means hidden. 2. It goes into overcoming forces of attraction. 3. It is latent heat. _Source: syllabus Science, Ch 1 'Matter in Our Surroundings'_

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The heat needed to melt 1 kg of a solid at its melting point is the:

  1. Latent heat of fission
  2. Latent heat of flotation
  3. Latent heat of fusion
  4. Latent heat of friction
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Correct answer: C. Latent heat of fusion

1. The change happens at atmospheric pressure. 2. It applies to one kilogram of solid. 3. It is the latent heat of fusion. _Source: syllabus Science, Ch 1 'Matter in Our Surroundings'_

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The temperature at which a liquid starts boiling is its:

  1. Bonding point
  2. Bearing point
  3. Bursting point
  4. Boiling point
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Correct answer: D. Boiling point

1. It is measured at atmospheric pressure. 2. Particles break free from each other there. 3. It is the boiling point. _Source: syllabus Science, Ch 1 'Matter in Our Surroundings'_

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