Answer these questions in your notebook when you think that you are ready.
You can take it as a mock exam.
Unit 5 Review: Forces
1. What is the difference between a contact and non contact force?
2. Is a push force a contact, non-contact or both?
3. What is an example of a non-contact force?
4. Magentism is a contact force. (True or False)
5. What happens when two opposite equal forces are applied to a table?
6. Write an example of an object that changes shape forever when a force isapplied.
7. What is the definition of magnetisim?
8. What is a natural magnet?
9. What is a man-made magnet?
10. What do magnets create around them?
11. Why does the needle on a compass point North?
12. Opposite poles ____________ eachother. (repel/attract)
13. Same poles of a magnet _______________. (push apart/pull together)
14. How many poles does a magnet have?
15. What is the definition of gravity?
16. Because of gravity we can lift objects of a large mass. (True or False)
17. What is mass?
18. How do we measure mass?
19. What is the equation for weight?
20. How do we measure weight?
21. What is upthrust?
22. Because of upthrust, a bird can fly. (True or False)
23. What two components influence the amount of upthrust?
24. An object with a __________ mass and a __________ volume has a lot ofupthrust. (Small or big)
25. What is buoyancy?
1. The difference between a contact force and a non contact force is that with contact forces one object orperson moves another by touch whereas in non-contact forces the force moves objects without touch.
2. Both
3. Magnetism
5. The forces are balanced and the table doesn´t move.
6. Smashing a can, chocolate breaking
7. Magnetism is a non-contact force that pushes or pullsand object
8. Magnetite
9. Iron & Steel
10. A magnetic field
11. Magnetism
12. Attract
13. Push apart
14. Two
15. Gravity is a non-contact force that pulls towards thecenter of objects.
16. False
17. Mass is the amount of matter in an object.
18. In kilograms.
19. Mass(kg) x Gravity = Newtons
20. In Newtons
21. A contact force applied by water and air. It pushesobjects in air and water up.
22. True
23. Mass and volume
24. Small , Big
25. The ability of an object to float in a liquid
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