Which observation indicates that heat is integral to the movement of fluid in a lava lamp?
A) The lava moves upward when it reaches 50C.
B) The liquids expand as heat is applied.
C) The density of the lava decreases as it reaches 50C.
D) There is no movement of fluid in a cold lava lamp.

Question

Quizplus · Accepted Answer

In a cold lava lamp, there is no movement of fluid because heat is necessary to decrease the density of the lava, causing it to rise and create the characteristic motion.

Which Observation Indicates That Heat Is Integral to the Movement