Which indicates that the clump of waxy fluid at the center of the lamp is moving downward rather than upward? it is less dense than the surrounding liquid. its molecules are losing kinetic energy. its molecules begin to slow down before they become faster. its temperature increases before it decreases again.

Option (b) is the correct answer.

Explanation:

The clump of wax at the center moves downward because its molecules loses kinetic energy.

As a result the molecules gain potential energy and thus, they come to rest in the downward direction.

Hence, we can conclude that the clump of waxy fluid at the center of the lamp is moving downward rather than upward is indicated by its molecules are losing kinetic energy.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance