Question 9 • 25-26 CHEMISTRY IN THE EARTH SYSTEM S1
Substance X is placed in a container with substance Y. Both substances are fluids. Substance X initially sinks to the bottom of the container. After five minutes of being heated on a hot plate, substance X becomes less dense than substance Y.
Answer
A
Substance X will rise due to convection.
B
Substance Y will rise due to convection.
C
Substance X will rise due to radiation.
D
Substance Y will rise due to radiation.
Explanation
Heating makes substance X less dense than substance Y. In fluids, the less-dense substance rises above the denser substance, producing convection, so substance X will rise.
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