The four laws of thermodynamics in everyday life

Answer Key - Grade 10 Science Worksheet - Building Confidence

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

1. 1.

   A gas takes in 400 J of heat and does 100 J of work pushing outward. By how much does its internal energy rise, Ari?

   300 J
2. 2.

   A gas takes in 1200 J of heat and does 450 J of work pushing outward. By how much does its internal energy rise, Bo?

   750 J

3. Read this first

   Use this

   One picture per law (textbook statements). Columns: law, picture, what it says. zeroth, a thermometer touching two cups, objects in balance with a third are at the same temperature; first, a battery lighting a bulb, energy changes form but is never made or destroyed; second, hot soup cooling in a room, heat flows from hot to cold, and the universe's disorder grows; third, a perfect crystal near absolute zero, a perfect crystal's disorder nears zero at 0 K.

4. 3.

   Using the pictures, which law says energy is never made or destroyed, Jun?

   • The third law
   • The first law
   • The zeroth law
5. 4.

   Using the pictures, which law makes thermometers work, Kira?

   • The second law
   • The first law
   • The zeroth law
6. 5.

   Using the pictures, which law explains hot soup cooling in a room, Luz?

   • The third law
   • The second law
   • The zeroth law
7. 6.

   Can a machine make energy from nothing, Noah?

   • Yes: with magnets
   • Yes: if it runs fast enough
   • No: energy is conserved
8. 7.

   A ball bounces lower each time. Where did its missing energy go, Pia?

   • Into the ball's mass
   • It was destroyed
   • Into heat and sound
9. 8.

   A thermometer in a glass of water settles at 20 °C. Why does that tell us the water's temperature, Ren?

   • It cools the water to 20 °C
   • It holds its own heat
   • It matches the water's temperature
10. 9.

    Objects A and B are each at the same temperature as object C. What is true of A and B, Tala?

    • B is warmer than A
    • A is a little warmer than B
    • They share one temperature
11. 10.

    When do two objects in contact stop exchanging net heat, Zee?

    • When one of them melts
    • When they weigh exactly the same amount
    • When their temperatures are equal