Convection

Question 1

Which best describes the shape of a convection current?

Revolt · Accepted Answer

circular

Question 2

Yami pours powdered cocoa mix into milk and stirs it. Then she microwaves the mixture for three minutes. When she takes the cup out, the handle is very warm. Steam rises from the cup, so she blows it before taking a sip. In which part of this scenario can convection be best observed?

Revolt · Accepted Answer

rising steam from the cup of cocoa

Question 3

Where could convection currents form?

Revolt · Accepted Answer

in the atmosphere

Question 4

The diagram shows the sun’s interior. Convection currents are present in the convection zone.

Revolt · Accepted Answer

They become more dense near the Sun’s surface.

Question 5

Which best describes the convection currents in Earth’s mantle?

Revolt · Accepted Answer

They transfer thermal energy away from Earth’s core toward its crust.

Question 6

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.

Revolt · Accepted Answer

density

Question 7

Water is boiling in a clear pot, as shown in the picture.

Revolt · Accepted Answer

Thermal energy is transferred.

Question 8

In a convection current, as the temperature of a fluid increases, what property of the fluid decreases?

Revolt · Accepted Answer

density

Question 9

Water is boiling in a clear pot, as shown in the picture.

Revolt · Accepted Answer

They are more spread out and moving faster than those at the surface.

Question 10

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?

Revolt · Accepted Answer

After the stove is turned off, convection currents continue to transfer energy through the water for a period of time.

Convection Answers

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