Natural - Unit 3

Choose the correct sentences about energy.

• Energy makes things happen.

• Energy can be created, destroyed and transformed.

• Energy can't be created or destroyed.

Answer explanation

Remember, you can't make energy. We only can transform it. It also makes things happen.

What is this energy?

• Thermal

• Radiant

• Sound

• Chemical

Answer explanation

It is the energy stored in chemical compounds. Chemical energy is released in a chemical reaction.

What is this energy?

• Thermal

• Radiant

• Sound

• Chemical

Answer explanation

The heater gives us warmth.

Thermal energy is also known as heat energy.

What is this energy?

• Thermal

• Radiant

• Sound

• Chemical

Answer explanation

Sunlight is an example of radiant energy.

Radiant energy is in the form of electromagnetic waves.

What is this energy?

• Thermal

• Radiant

• Sound

• Chemical

Answer explanation

When particles vibrate they produce energy that travels in waves to your ear.

When these waves reach your eardrums, they start to vibrate too, and you hear a sound. 

What is this energy?

• Thermal

• Electrical

• Mechanical

• Chemical

Answer explanation

The toaster is connected with the plug 🔌

Electrical energy is the movement of small charged particles called electrons. 

What is this energy?

• Thermal

• Electrical

• Mechanical

• Chemical

Answer explanation

Every moving object has mechanical energy.

Patri's skate transforms the ... energy of her muscles 💪🏿 into mechanical energy.

Answer explanation

Remember, we eat food that contain chemical energy for our muscles to function.

Patri's remote control transforms the ... energy of its batteries 🔋 into electrical energy.

Answer explanation

Remember, batteries store chemical energy that transform into electrical energy.

Patri's toaster transforms electrical energy into ... energy.

Answer explanation

A toaster makes the toast warmer, so that heat is thermal energy.