1. Checkpoint Physics Quiz 1 – Earth’s Forces Physics Unit Dr. Browne

2. 1.The measure of the amount of heat in an area is ____________. 2.The metric scale of temperature is __________. 3.Physical scientists use the ___________ temperature scale because is can measure extreme temperatures. 4.The point at which there is no energy in matter is called __________.

4. 5. Fill in the missing data: Freezing PointBoiling Point Celsius0 Fahrenheit212 Kelvin273 6. The instrument used to measure temperature is the _____________________.

6. 7. The mass per unit volume is an objects’ ___________. 8. The upward force of a fluid acting on an object is __________. 9. The buoyant force on an object is equal to the weight of the fluid displaced by the object is known as _________________ __________________. 10. What is the density of water? _____________ 11. Objects more dense than the fluid they are in will _____________; objects less dense than the fluid they are will _______________.

7. 12. Physics is the study of __________ and________ and their relation to the ______________________.

9. Check Point 13. What is a force? A __________________________ 14. To describe a force both the _______________ and the ________________ are needed. 15. Unbalanced forces occur when... 16. Balanced forces are ______________ in size and ________________ in direction. 17. _______________ forces do not cause a change in an objects motion.

11. 18. The _________________ of an object is the amount of gravity pulling on it. 19. Look at the diagram below and answer the question that follow: a. What is the net force acting on the box? ________ b. What is the effect of the forces on the box? 10 N 3 N 9 N

13. 20. The Gravity is the force of ___________________ between objects in the universe. 21. What is Universal gravitation? Who came up with it? 22. If the mass of an object increases, gravity will _______________. An object with less mass will have _______________ gravity than an object with greater mass. 23. As the distance between objects increases, the gravity will _____________________. 24. Air resistance is increased by an increase in _____________.

15. Answer Key How did you do?

16. Answer Key 1.The measure of the amount of heat in an area is temperature. 2.The metric scale of temperature is Celsius. 3.Physical scientists use the Kelvin temperature scale because is can measure extreme temperatures. 4.The point at which there is no energy in matter is called absolute zero.

17. 5. Fill in the missing data: Freezing PointBoiling Point Celsius0100 Fahrenheit32212 Kelvin273373 6. The instrument used to measure temperature is the thermometer.

18. 7. The mass per unit volume is an objects’ density. 8. The upward force of a fluid acting on an object is buoyant force. 9. The buoyant force on an object is equal to the weight of the fluid displaced by the object is known as Archimedes’ principle. 10. What is the density of water? 1 g/mL 11. Objects more dense than the fluid they are in will sink (negative buoyancy); objects less dense than the fluid they are will float (positively buoyant).

19. 12. Physics is the study of matter and energy and there relation to the universe.

20. Check Point 13. What is a force? A push or pull 14. To describe a force both the size (magnitude) and the direction are needed. 15. Unbalanced forces occur when... Forces are unequal in size. 16. Balanced forces are equal in size and opposite in direction. 17. Balanced forces do not cause a change in an objects motion.

21. 18. The weight of an object is the amount of gravity pulling on it. 19. Look at the diagram below and answer the question that follow: a. What is the net force acting on the box? 2 N b. What is the effect of the forces on the box? Moves to the left with a force of 2 N 10 N 3 N 9 N

22. 20. The Gravity is the force of attraction between objects in the universe. States that all objects in the universe are attracted to each other. Sir Isaac Newton 21. What is Universal gravitation? Who came up with it? States that all objects in the universe are attracted to each other. Sir Isaac Newton 22. If the mass of an object increases, gravity will increase. An object with less mass will have less gravity than an object with greater mass. 23. As the distance between objects increases, the gravity will decrease. 24. Air resistance is increase by an increase in surface area.