Grade 4 · Science · Unit 5 of 6
Energy Changes
Energy changes form
What your child practises
Forms of energy, how everyday devices change one form into another, renewable and non-renewable resources, and how hydroelectricity is made.
NWT Curriculum learning standard: Energy has various forms and can be transformed; devices that transform energy; local energy resources
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
Follow the energy in a flashlight. Put the steps in order.
- 🔋The battery stores chemical energy
- ⚡Electricity flows through the wires
- 💡The bulb gives off light
The battery stores chemical energy → Electricity flows through the wires → The bulb gives off light
Hint: The battery stores chemical energy. It becomes electrical energy in the wires, then light in the bulb.
Question 2
Most of Canada's electricity is made using…
⚡- 🌬️wind turbines
- 🌊moving water (hydroelectricity)
- ☀️solar panels
- 🪨burning coal
🌊 moving water (hydroelectricity)
Hint: Canada has many big rivers. More than half of our electricity comes from hydroelectric dams.
Question 3
Energy from the sun reaches Earth as…
☀️- chemical energy in batteries
- electricity in wires
- sound and motion
- light and heat
light and heat
Hint: Sunlight lights up the day and warms the land, water and air.
Question 4
Which device changes sound energy into electrical energy?
- 💡light bulb
- 🎤microphone
- 🔊speaker
- 🍞toaster
🎤 microphone
Hint: A microphone 'hears' your voice and turns it into an electrical signal. A speaker does the opposite.
Question 5
Which energy change happens in a toaster?
🍞toaster- sound → electrical
- electrical → heat
- chemical → heat and light
- electrical → motion
electrical → heat
Hint: Ask yourself: what kind of energy goes in, and what kind comes out? Here it's electrical → heat.
Question 6
Which energy change happens when you rub your hands together fast?
👐rubbing hands- motion → heat
- electrical → light
- chemical → heat and light
- motion → electrical
motion → heat
Hint: Ask yourself: what kind of energy goes in, and what kind comes out? Here it's motion → heat.