8. Revisit the concept that ⬆️ height causes ⬆️ total energy with a larger cat to really emphasise the point.

9. Students should now be able to share three variables that will affect GPE - height, mass and gravity

6. Students should now be confident that ⬆️ mass also causes ⬆️ energy

7. Next, ⬆️ the gravity from a little to a lot. What happens to the total energy?

4. Guide students to reach the conclusion that ⬆️ height causes ⬆️ total energy.

5. Change the mass of the cat from tabby to tiger (60kg). What happens to the total energy?

1. Highlight the variables that can be changed (friction, gravity, mass, skater). Click to show the energy graph.

2. Choose the cat (why not?!) and make it a normal mass (5kg).

3. As you lift the cat to the top of the ramp, ask students to describe the change in total energy.