Motion energy and stored energy of particles

Answer Key - Grade 11 Science Worksheet - Building Confidence

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

1. 1.

   A thermometer in a sample reads 25 °C. What is the sample's temperature in kelvins, Ari?

   298.15 K
2. 2.

   A thermometer in a sample reads 100 °C. What is the sample's temperature in kelvins, Bo?

   373.15 K
3. 3.

   A thermometer in a sample reads -20 °C. What is the sample's temperature in kelvins, Esme?

   253.15 K
5. 4.

   In the energy bar chart, which particle store grows as the water warms, Jun?

   • Neither, since warming adds no energy
   • Particle kinetic energy
   • Particle potential energy
6. 5.

   In the energy bar chart, how much energy was added to the water, Kira?

   Use the picture in question 4.

   • 600 J, the new kinetic bar
   • 300 J
   • 1100 J
7. 6.

   In the energy bar chart, what does the taller kinetic bar mean for the water's particles, Luz?

   Use the picture in question 4.

   • They move faster on average
   • They have become bigger than before
   • They stop moving
8. 7.

   A squeezed spring stores energy. At the particle scale, where is that energy stored, Noah?

   • In heat inside the coils
   • In particles pushed closer together
   • In the spring's motion
9. 8.

   At the particle scale, where is the chemical energy in a battery stored, Pia?

   • In how its atoms are bonded
   • In the battery's height
   • In the particles' speed
10. 9.

    What happens to particle motion as a sample is cooled toward 0 K, Tala?

    • It speeds up
    • It stops at 0 °C
    • It slows toward a minimum
11. 10.

    Do the particles in ice at 0 °C still move, Zee?

    • No: frozen particles stand still
    • Yes: 0 °C is 273.15 K
    • No: 0 °C means no motion