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 20 °C to 80 °C. To the nearest hundredth, how many times larger is its particles' average kinetic energy, Bo?
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?
- Neither, since melting needs no energy
- Particle potential energy
- Particle kinetic energy, so the ice warms
In the energy bar chart, why does the temperature stay at 0 °C while the ice melts, Kira?
Use the picture in question 4.
- No energy goes in
- The particles speed up, but the thermometer can't tell
- 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 4.
- 434 J
- 334 J
- 0 J
In the heating-curve graph, what is happening along the first flat part, Milo?
- The ice is warming up
- The water is boiling
- The ice is melting
A rubber band is stretched. At the particle scale, why does it store energy, Ren?
- Its particles move faster
- It gains particles
- Its particles are pulled from their usual positions
A hand-warmer packet heats up as its iron powder reacts with air. Where did the energy come from, Tala?
- The packet's motion
- Particle potential energy in bonds and arrangements
- Sunlight stored in the air
Water evaporates from a warm dish. Why does the water left behind cool, Zee?
- Evaporation adds energy to the water
- The fastest particles leave, lowering the average
- The particles left behind grow bigger