8th Grade Physics in Review

Take this quiz and look at your score.

Reflect.

Take the quiz again as may times as you need to in order to feel good about your understanding of these concepts.

Remember that your attitude can determine altitude.

You CAN do it!!!

Forces1. A force is2. Force is a vector quantity

because it has3. The SI unit used to measure the

magnitude of a force is the4. The combination of all the forces

acting on an object is called the5. Equal forces acting on one object

in opposite directions are called

Forces Continued6. The tendency of an object to

resist motion is called7. Gravity is a force that8. The two elastic forces are9. Friction is a force that10. When a book is sitting on a

table, what is the force of the table pushing up on the book called?

Finishing Forces11. If the net force on a chair is 6N to the

right, what will occur?12. A centripetal force is13. What is the effect of lift?14. The rate at which velocity changes with

time is called15. The rate at which velocity changes with

time is called16. The acceleration of an object depends

both on the net force acting on the object and on

17. Acceleration equals

Astronomical Forces18. Astronomers theorize that the

universe began with a enormous explosion of matter (force) called

19. The sun was formed when20. The path of an object as it

revolves around another object is space is called a(an)

21. The force that holds the moon in orbit around the Earth is

Motion22. A standard reference point is a place

or object23. Name an object that would make a

good reference point.24. The position of an object can be

defined using a reference point and a set of

25. The speed of an object is the26. Velocity is speed27. Velocity is a vector quantity because

it has both

More on Motion28. What equation can be used to

determine the speed of a moving object?

29. What equation can be used to determine the average speed of a moving object?

30. What equation is used to solve a problem that involves finding distance, given the time and average speed?

A Final Word on Motion31. A change in a speed, direction,

or both is a change in a moving object’s

32. What is the SI unit of acceleration?

33. On a position-versus-time graph, where is time shown?

34. Slope is35. To determine the slope of a

line,

Density and Buoyancy36. The density of a substance is based

on the substance’s37. Which unit is used to express the

density of a substance?38. When a sample of liquid is divided in

half, its density39. What is density used to determine?40. How is the mass of a rectangular

solid measured?41. How is the mass of an irregular solid

measured?

Wrapping Up Density and Buoyancy42. A beach ball pops out of water

because the buoyant force is43. Why does a ship float, when a

solid block of steel of equal weight sinks?

44. Why does an air-filled balloon fall to the ground?

45. Whether an object will sink or float in a fluid can be predicted by knowing