1. What are four ways to change momentum? When it is applied to physics
2. What is the difference between the quantities that have vector drawings and the ones that don't?
3. what does "elastic collision" mean? when applied to physics
4. List quantities that have the same value (and direction if a vector) before and after the collision. If a quantity has the same value (and direction if a vector) it is said to be "conserved"
5. What quantities are not "conserved"? when applied to physics