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
4. 4.

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

   • 600 J, the new kinetic bar
   • 1100 J
   • 300 J
5. 5.

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

   • The size of each particle
   • The number of particles in the block
   • The particles' motion energy
6. 6.

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

   • In particles pushed closer together
   • In heat inside the coils
   • In the spring's motion
7. 7.

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

   • In the battery's height
   • In the particles' speed
   • In how its atoms are bonded
8. 8.

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

   • The 20 °C cup
   • The 60 °C cup
   • They move at the same speed
9. 9.

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

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

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

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