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?

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

   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 have become bigger than before
   • They move faster on average
   • They stop moving
7. 6.

   A metal block warms up. At the particle scale, what has increased, Milo?

   • The particles' motion energy
   • The number of particles in the block
   • The size of each particle
8. 7.

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

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

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

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

    One cup of water is at 20 °C and another is at 60 °C. In which do the particles move faster on average, Ren?

    • They move at the same speed
    • The 60 °C cup
    • The 20 °C cup
11. 10.

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

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