WorksheetsUnderstanding Thermal Energy
Total questions: 12
Worksheet time: 11mins
What does each circle in the Thermal Energy Simulation represent?
Atoms
Molecules
Drops of water
Air particles
Why does food coloring spread faster in hot water than in cold water?
Hot water is lighter.
Molecules in hot water move faster.
Food coloring dissolves better in hot water.
There are more molecules in hot water.
What happens to the molecules of a substance when its temperature increases?
They slow down.
They stop moving.
They move faster.
They break apart.
Which of the following best explains why temperature affects molecular motion?
Temperature changes the size of molecules.
Higher temperatures give molecules more energy.
Cold temperatures make molecules heavier.
Molecules at higher temperatures attract each other.
What is a molecule?
A single atom
A group of atoms joined together
A tiny particle of light
A group of water drops
In the Simulation, what is one difference you notice between hot and cold samples of water?
The cold sample has fewer molecules.
Molecules in the hot sample move faster.
Molecules in the cold sample are larger.
The hot sample has more molecules.
Which of the following is true when a substance reaches absolute zero?
The molecules stop moving entirely.
The molecules move very fast.
The molecules break apart.
The molecules change shape.
When the molecules in a sample speed up, what happens to its temperature?
The temperature increases.
The temperature decreases.
The temperature stays the same.
The sample cools down.
What evidence from the Simulation helps explain the faster spreading of food coloring in hot water?
Molecules in hot water are farther apart.
Molecules in hot water are moving faster.
Molecules in cold water are smaller.
Molecules in cold water are slower to form.
Why do scientists use simulations like the Thermal Energy Simulation?
To replace experiments completely
To observe molecular motion more clearly
To avoid working with dangerous chemicals
To measure water temperature
Describe what happens to the speed of molecules as the temperature increases.
Explain why food coloring spreads faster in hot water using evidence from the Simulation.
