Worksheet

Heat flow and the final temperature of a mixture

Grade 11 Science Worksheet - Challenge Me

NameDate

Circle the best answer, or write your answer on the line.

  1. Bo puts a 1 kg copper block (c = 385) at 90 °C into 0.5 kg of water at 20 °C in an insulated cup. What is the final temperature to 0.1 °C?

  2. Esme puts a 2 kg iron block (c = 449) at 80 °C into 2 kg of water at 15 °C in an insulated cup. What is the final temperature to 0.1 °C?

  3. 1 kg of copper at 100 °C goes into 1 kg of water at 20 °C. Will the final temperature be nearer 20 °C or 100 °C, Jun?

    • Nearer 100 °C, since copper is a metal
    • Exactly 60 °C, halfway
    • Nearer 20 °C

  4. Which change would bring a block-and-water mix's final temperature closer to the block's starting temperature, Luz?

    • Using more water
    • Stirring for longer
    • Using less water

  5. Milo says cold flows from an ice pack into a warm box. Agree or disagree?

    • Agree: ice packs give off cold energy into the warm box
    • Disagree: heat flows from the box into the ice pack
    • Agree: cold moves the way heat does

  6. Noah says a metal block feels colder than a wooden block at the same room temperature because the metal is colder. Agree or disagree?

    • Disagree: metal carries heat away faster
    • Agree: wood makes its own heat
    • Agree: metal holds more cold than wood does

  7. Pia says two samples in contact stop exchanging heat when they have the same thermal energy. Agree or disagree?

    • Agree: the bigger sample gives heat to the smaller
    • Disagree: they stop at the same temperature
    • Agree: the energy has to even out

  8. A team tests how much a hot metal block warms water. Which step makes the result more accurate, Ren?

    • Measuring once, quickly
    • Using an insulated cup with a lid
    • Using an open metal pan

  9. Why should the water be stirred before reading the final temperature, Tala?

    • To make the block lighter
    • To cool the thermometer down
    • So the whole sample is at one temperature

  10. A measured final temperature is 2 °C below the prediction. What is the most likely reason, Zee?

    • Some heat escaped to the cup and the air
    • Energy was destroyed in the cup
    • The water made extra cold
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Heat flow and the final temperature of a mixture

Answer Key - Grade 11 Science Worksheet - Challenge Me

Circle the best answer, or write your answer on the line.

  1. Bo puts a 1 kg copper block (c = 385) at 90 °C into 0.5 kg of water at 20 °C in an insulated cup. What is the final temperature to 0.1 °C?

    30.9 °C

  2. Esme puts a 2 kg iron block (c = 449) at 80 °C into 2 kg of water at 15 °C in an insulated cup. What is the final temperature to 0.1 °C?

    21.3 °C

  3. 1 kg of copper at 100 °C goes into 1 kg of water at 20 °C. Will the final temperature be nearer 20 °C or 100 °C, Jun?

    • Nearer 100 °C, since copper is a metal
    • Exactly 60 °C, halfway
    • Nearer 20 °C

  4. Which change would bring a block-and-water mix's final temperature closer to the block's starting temperature, Luz?

    • Using more water
    • Stirring for longer
    • Using less water

  5. Milo says cold flows from an ice pack into a warm box. Agree or disagree?

    • Agree: ice packs give off cold energy into the warm box
    • Disagree: heat flows from the box into the ice pack
    • Agree: cold moves the way heat does

  6. Noah says a metal block feels colder than a wooden block at the same room temperature because the metal is colder. Agree or disagree?

    • Disagree: metal carries heat away faster
    • Agree: wood makes its own heat
    • Agree: metal holds more cold than wood does

  7. Pia says two samples in contact stop exchanging heat when they have the same thermal energy. Agree or disagree?

    • Agree: the bigger sample gives heat to the smaller
    • Disagree: they stop at the same temperature
    • Agree: the energy has to even out

  8. A team tests how much a hot metal block warms water. Which step makes the result more accurate, Ren?

    • Measuring once, quickly
    • Using an insulated cup with a lid
    • Using an open metal pan

  9. Why should the water be stirred before reading the final temperature, Tala?

    • To make the block lighter
    • To cool the thermometer down
    • So the whole sample is at one temperature

  10. A measured final temperature is 2 °C below the prediction. What is the most likely reason, Zee?

    • Some heat escaped to the cup and the air
    • Energy was destroyed in the cup
    • The water made extra cold