Energy #3: Thermal

Energy #3: Thermal

Thermal Energy

• aka "Infrared" or "Heat Energy"

• Energy Associated with the motion of particles (atoms & molecules etc)

Thermal Energy is NOT "Temperature"

Multiple Choice

Which would have MORE thermal energy?

• a 2" square cube of Copper at 70 degrees F

• a 5" square cube of Copper at 70 degrees F

• a 2" square cube of Copper at 35 degrees F

• a 5" square cube of Copper at 35 degrees F

Multiple Choice

Which has MORE thermal energy?

• a cup of very hot coffee

• an large iceberg

Multiple Choice

Which will transfer heat the fastest?

• a hot cup of coffee

• an iceberg

• a glass of lukewarm water

Poll

Where do you think a home would have the MOST heat "loss" based on this image (a home in the winter). Red= heat.....Blue = cool temperatures

• Roof

• Garage

• Windows

• Doors

• siding

Multiple Choice

Scientists also monitor thermal transfer (aka 'heat') in our oceans as we experience trends in global warming.......

What do you notice the energy in our oceans since 1995?

• it has increased at the surface and below the surface

• it has decreased at the surface and below the surface

• there has really been no change

Multiple Select

Which is true about Earth's Energy Budget?

• Radiant Energy from the Sun enters Earth's atmosphere

• A Lot of energy is ABSORBED by land, oceans, clouds and the atmospheric gas

• A Lot of energy is REFLECTED back into space by clouds, the atmosphere and earth's surface

• A lot of energy is RADIATED (emitted) back into space

• Some energy is CONDUCTED from Earth's surface into air currents in the atmosphere

Multiple Choice

Which type of energy transfer is ONLY involved with fluids (liquids and gas )?

• Conduction

• Convection

• Radiation

• Conduction and Radiation

Multiple Choice

Which type of energy transfer is common to solids.....where there is direct matter to matter transfer of heat energy?

• Radiation

• Conduction

• Convection

• Convection and Radiation

Multiple Choice

Which type of energy transfer is the ONLY one that can travel through space , as EM waves-- without matter being involved?

• Conduction

• Convection

• Radiation

• none

Multiple Select

Why do the beans in the boiling water 'rise' and 'sink'?

• they absorb energy when closest to the source of heat and rise due to increased kinetic energy.

• they release 'heat' to the air when they reach the top of the beaker.....this results in a slower particle motion and increased density causing them to sink

• all are true

• because of convection currents in the water

Multiple Choice

Energy transfer, or "heat" occurs MOST quickly and reaches "equilibrium" when

• the objects exchanging heat are furthest apart in temperature readings, or have a big difference in temperature

• the objects are almost the same temperature

• the objects are at the same temperature

• none of the above