Radiation Answers
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Where could convection currents form?
A
in a sand duneB
on a pavementC
in the atmosphereD
in outer space2
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Which is required for convection to occur?
A
a solid substanceB
a heat sourceC
boiling waterD
air molecules3
The lava lamp has a light bulb as a heat source at its base. The lamp contains a colored, waxy fluid that can be observed moving in clumps through a clear liquid.
A
densityB
temperatureC
kinetic energy of its moleculesD
space between its molecules4
Water is boiling in a clear pot, as shown in the picture.
A
They are more spread out and moving faster than those at the surface.B
They are closer together and moving faster than those at the surface.C
They are more spread out and moving slower than those at the surface.D
They are closer together and moving slower than those at the surface.5
A student places a large pot of cold water on a stove and heats it for one minute. Then she takes the pot of water off the burner and places it on the counter. Which best describes the convection currents?
A
Convection currents move thermal energy from the stove to the pot, and then from the pot to the water.B
After the stove is turned off, convection currents continue to transfer energy through the water for a period of time.C
Convection currents in the water cause warmer, denser water to rise and transfer energy upward.D
When the stove is turned on, convection currents cause an increase in the chemical energy of water molecules.Did you find these answers helpful?
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