# Laws of Motion Test Review

• Laws of Motion Test Review

1. What do we call forces that are equal in size but in the opposite direction?  Balanced forces

2. What do we call a change in position?  Motion

3. What is the force that opposes motion?  Friction

4. What is the rate of change of position?  Speed

5. What is the rate of change of velocity?  Acceleration

6. When an unbalanced force acts on an object what does it cause the object to do?  Accelerate

7. In science what do we call it when a bike slows down?  An acceleration

8. If two dogs are pulling on a rope and the rope moves toward one of the dogs, then we know what about the forces acting on the rope?  Unbalanced

9. If someone tells you a car is moving at 60 mile per hour what have they given you?  Speed

10. If someone tells you a car is moving at 60 miles per hour north what have they given you?  Velocity

11. What is the unit force is measured in?  The newton

12. When talking about action-reaction forces is the action force created first, the reaction force created first or are they created at the same time?  They are created at the same time.

13. According to Newton’s first law of motion what type of force acts on an object to cause it to go from being at rest to being in motion?  An unbalanced force

14. Which law states that “for every action, there is an equal and opposite reaction”?  Newton’s third law

15. What is the force on an object that must be overcome before it will start moving?  Static friction

16. What causes a feather to fall to the ground slower than a rock?  Air resistance

17. Compare and contrast distance and displacement.

They both involve how far something has moved but displacement includes a direction.

18. Compare and contrast speed and velocity.

They both determine the rate at which something changes position but velocity also includes direction.

19. How is force, acceleration, velocity, and displacement similar to each other?

They are all vector quantities and require magnitude and direction for a complete picture.

20.  Boy A and Boy B are pulling on a rope.  Identify two pairs of action-reaction forces involving the rope.

Boy A on rope; rope on Boy A  and  Boy B on rope; rope on Boy B

21. Boy A and Boy B are pulling on a rope.  If the rope is not moving toward either boy, identify two balanced forces involving the rope.

The force of Boy A on the rope is equal to the force of Boy B on the rope.

22. Boy A is pulling on a rope harder than Boy B.  What will happen to the rope?

The rope will move toward Boy A

1. Boy A and Boy B are pulling on a rope.  If the rope moves toward Boy B, what do you know about the forces on the rope?

The force of Boy B on rope is greater than the force of Boy A on rope.

24. In the chemical formula C6H12O6, how many atoms of C, H, and O are there? 6 carbons, 12 hydrogens, and 6 oxygens

25. Is burning paper an example of a physical or a chemical change? Chemical change

26.  In a nuclear power plant, what type of energy is nuclear energy first changed into?  Thermal energy

27. What type of energy is stored in a green plant?  Chemical energy

28. What type of energy is “lost” in evert energy transformation? Thermal energy

29. What is a prediction or statement that can be tested?  Hypothesis

30. Where are electrons located in an atom?  Outside the nucleus

31. What is the smallest unit of life?  Cell

32. How are elements arranged in the modern periodic table?  According to increasing atomic number

33. What are 3 structures found in a plant cell but not an animal cell?  Chloroplast, cell wall, and central vacuole