Day 13 Puzzle (Review of Day 7 & 8)

4. the type of simple machine that a ramp is
7. energy of heat from tiny moving particles
8. a ball rolling ___ speeds up because the force of gravity is pulling it down
11. stored energy that can be used later
12. the more potential energy that is converted, the ___ the object moves
15. friction is a force that pushes against an object to ___ its motion
17. the differences in ___ between the turf hill and the lower courtyard ramp are examples of a confounding variable
19. muscular ___ is a group of diseases that cause muscles to become weak and get smaller over time
22. surface tilted at an angle that reduces force by increasing distance
23. friction is present whenever two ___ rub over each other
24. to calculate ___, you divide distance by time
25. ___ surfaces create more friction
26. gravity gets ___ the closer you are to the center of the Earth

1. a force that opposes motion
2. this increases as potential energy turns into kinetic energy because the stored energy is changing into motion
3. the energy of moving things
5. sources of potential energy are considered ___ ___ and must be identified when performing risk assessments of an area
6. as something travels downhill, potential energy is ___ into kinetic energy
9. inclined planes can be useful when sending things downhill because ___ is working in your favor, but that same force is why moving uphill can be challenging
10. special type of inclined plane that works in a winding pattern around a cylindrical shaft
13. there are ___ main types of energy
14. aspects of the experiment that may have affected the results
16. cause changes to the motion of objects
18. the force that pulls things down towards the center of the earth
20. no surface is 100% perfectly ___
21. potential energy increases with ___, like at the top of a hill