Motion energy and stored energy of particles
Grade 11 Science Worksheet
Circle the best answer, or write your answer on the line.
A gas is warmed from 27 °C to 327 °C. To the nearest hundredth, how many times larger is its particles' average kinetic energy, Ari?
A gas is warmed from 10 °C to 50 °C. To the nearest hundredth, how many times larger is its particles' average kinetic energy, Esme?
In the energy bar chart, which store does the energy go into as the ice melts, Jun?
- Particle kinetic energy, so the ice warms
- Neither, since melting needs no energy
- Particle potential energy
In the energy bar chart, why does the temperature stay at 0 °C while the ice melts, Kira?
Use the picture in question 3.
- The particles speed up, but the thermometer can't tell
- No energy goes in
- The particles' average motion energy doesn't change
In the energy bar chart, how much does the particle potential energy grow, Luz?
Use the picture in question 3.
- 334 J
- 0 J
- 434 J
In the heating-curve graph, what is happening along the first flat part, Milo?
- The water is boiling
- The ice is warming up
- The ice is melting
In the heating-curve graph, which particle store grows along the flat parts, Noah?
Use the picture in question 6.
- Particle potential energy
- Particle kinetic energy
- Neither, since the temperature is flat
In the heating-curve graph, how much energy does the melting take, Pia?
Use the picture in question 6.
- 42 J
- 334 J
- 376 J
A hand-warmer packet heats up as its iron powder reacts with air. Where did the energy come from, Tala?
- The packet's motion
- Sunlight stored in the air
- Particle potential energy in bonds and arrangements
Water evaporates from a warm dish. Why does the water left behind cool, Zee?
- The particles left behind grow bigger
- Evaporation adds energy to the water
- The fastest particles leave, lowering the average