6.2 Thermal Energy Lessons 4 & 5 Assessment

Front

How do particles in a gas differ from those in a liquid?

Back

Gas particles have a lot of space between them, while liquid particles do not.

Front

What happens to water over time in an open cup?

Back

It evaporates.

Front

Why is measuring mass important in experiments involving matter loss?

Back

It helps to show how much matter left the system.

Front

What is one reason a cup with a lid cools down slower than a cup without a lid?

Back

The lid slows down the loss of heat and matter.

Front

Evaporation

Back

When a liquid turns into a gas

Front

Where do the water droplets on the outside of a cold cup come from?

Back

From the air outside the cup

Front

Why doesn’t the mass of a closed system change?

Back

Matter does not enter or leave a closed system.

Front

What causes water droplets to form on a cold surface?

Back

Humid air coming into contact with the cold surface.

Front

Which of the following is an example of condensation? Options: Ice melting in the sun., Steam rising from a hot soup., Water droplets on a cold soda can., Rain falling from clouds.

Back

Water droplets on a cold soda can.

Front

Why do we see water droplets on car windows during cold weather?

Back

The warm air inside the car touches the cold glass.