Jasmine adds varying amounts of ice to samples of water. Which conclusion can she draw from her experiment?

Question

options:

A). As water temperature increases, the water molecules’ kinetic energy decreases.

B). As water temperature decreases, the water molecules’ kinetic energy increases.​​​​​​​

C). As ice added increases, the change in water temperature increases.

D). As ice added decreases, the water temperature decreases.

Answer 1

Based on the context of Jasmine’s experiment with varying amounts of ice added to samples of water, the most appropriate conclusion she can draw is:

C). As ice added increases, the change in water temperature increases.

This conclusion is consistent with the principle that adding ice (which is at a lower temperature) to water will generally lower the temperature of the water, depending on the amount of ice added. The more ice added, the greater the potential change in temperature, as the ice absorbs heat from the water to melt.

Answer 2

A student puts different numbers of ice cubes into four separate containers of water. She calculates the change in temperature in each container after half an hour. In this experiment, what is the independent variable?

options:

A). Final water temperature

B). Number of ice cubes added

C). Initial water temperature

D). Time elapsed

Answer 3

In the described experiment, the independent variable is:

B). Number of ice cubes added.

The independent variable is the factor that is intentionally changed or manipulated by the experimenter to observe its effect on another variable (in this case, the final water temperature). The numbers of ice cubes added are what the student is varying in each container.