Thermal Energy Investigation

What happens to molecules when they are heated?

• They slow down.

• They move faster.

• They stop moving.

• They shrink.

What is the purpose of using a thermometer in the investigation?

• To mix the water.

• To measure the water's temperature.

• To stir the food coloring.

• To record the color change.

In the investigation, why is food coloring used?

• To make the water warmer.

• To show how molecules move in hot and cold water.

• To change the water's temperature.

• To compare the sizes of molecules.

Which of these is true about warm water compared to cold water?

• Molecules in warm water move faster.

• Molecules in cold water evaporate faster.

• Molecules in warm water stop moving.

• Molecules in cold water expand more.

Why should you allow the water to settle before adding food coloring?

• To prevent it from spilling.

• To make sure the temperature is accurate.

• To avoid mixing the colors too early.

• To let the molecules cool down.

What does the red line on a thermometer represent?

• The level of food coloring.

• The temperature in Celsius.

• The water level in the cup.

• The molecules' speed.

What prediction could you make before the experiment?

• The food coloring will stay in one place.

• The food coloring will spread faster in cold water.

• The food coloring will spread faster in warm water.

• The food coloring will not spread in either water.

Why do we reflect on the investigation results?

• To guess what might happen next.

• To check if our observations match our predictions.

• To mix the water again.

• To record the temperature of the room.

What would happen if you used hot and warm water instead of hot and cold water?

• The experiment results would stay the same.

• The food coloring would spread equally fast.

• There would be no noticeable difference.

• The food coloring would stop moving.

How does the movement of molecules affect the temperature of water?

• Faster molecules make the water colder.

• Slower molecules make the water warmer.

• Faster molecules make the water warmer.

• Molecule movement does not affect temperature.