Thermal Energy Teaching Resources

Teaching about thermal energy just got easier! Download printable worksheets, hands-on activities and Google Slide templates — created by teachers for Aussie science teachers and yourlesson plans.

This collection of Australian Science curriculum-aligned resources includes editable options and resources that our teacher team has already differentiated for you to make teaching about this type of energy much easier.

Explore printable and digital versions of our most popular electrical energy activities, including key electricity vocabulary, kid-friendly experiments and projects. Each resource has undergone rigorous review by a Teach Starter teacher team member to ensure it's ready for use in your classroom.

Whether it's your first year covering thermal energy in the classroom or you're just looking for some new ideas, we have you covered! Read on for a primer from our teacher team, including a thermal energy definition and some examples you can use with your students.

What Is Thermal Energy? A Kid-Friendly Definition

So what exactly is thermal energy, and how do you explain it to kids? Here's a definition you can add to your lesson plans!

Thermal energy is the internal energy of a substance. This energy comes from the way the atoms and molecules in the substance or object move and interact with one another.

When molecules move faster, they have more thermal energy. When they move slower, they have less.

Thermal Energy and Temperature

Thermal energy is directly related to the temperature of an object or substance.

• When the temperature increases, so does its thermal energy!
• When the temperature decreases, the thermal energy decreases too.

What Are Kinetic Energy and Potential Energy? Kid-Friendly Definitions

Thermal energy is made up of a mix of the total kinetic energy of the molecules in a particular substance plus their potential energy.

With that in mind, we've got a simple kinetic energy definition and a definition of potential energy that you can use as well.

Kinetic Energy

Kinetic energy is the energy an object possesses due to its motion. In the case of thermal energy, it's the motion of the molecules that provides the kinetc energy component of thermal energy.

• The formula for kinetic energy is KE = 1/2 * mass * velocity^2.

Potential Energy

Potential energy is the energy stored in an object due to its position or condition. When potential energy is released, it can be transformed into thermal energy.

Thermal Energy vs. Heat Energy — What's the Difference?

We can't talk about thermal energy in science class without talking about heat.

Heat is something that makes things warm or hot, and heat can cause changes in thermal energy.

So are thermal energy and heat energy the same thing? Not quite!

• Heat energy specifically refers to the transfer of energy from a region of higher temperature to a region of lower temperature.
• Thermal energy, on the other hand, represents the overall energy content of a system.

How Is Thermal Energy Transferred?

If you've ever touched a dish that is still warm from the oven with your bare hand, you've experienced how thermal energy can transfer from one object to another.

There are three main ways that this can occur:

Conduction Heat Transfer

Conduction heat transfer is a transfer of heat from an area of higher temperature to an area of lower temperature — essentially from a warmer end to a cooler end.

When you touch a hot pan out of the oven, heat is conducted from the dish to your hand. If you place a piece of ice in your hand, it will start to melt as heat from the body transfers to the ice.

Convection Heat Transfer

Convection is another method of heat transfer, but this type occurs through the movement of liquids or gases. Convection happens when warmer, less dense substances rise, and cooler, denser substances sink.

A good example of convection that can be demonstrated right in the classroom with the help of a Bunsen burner is boiling water.

When a pot of water boils, the hotter water rises. Meanwhile, the cooler water sinks. This creates a convection current.

Radiation Heat Transfer

The final method of heat transfer is called radiation. This term refers to the transfer of energy through electromagnetic waves.

For example, if you place your hand near a burning candle, you may feel the heat through radiation. We also feel the heat of the sun through radiation.