1. Force pressure and viscosity

3. FORCES

4. WEIGHT

5. PRESSURE

6. CALCULATING PRESSURE

7. VISCOSITY

8. ADHESION & COHESION

9. MISCELLANEOUS

10. FORCES
WEIGHT
PRESSURE
CALCULATING PRESSURE
VISCOSITY
ADHESION & COHESION
MISC.
100
100
100
100
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200
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300
300
300
300
300
300
300
400
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500
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500
500
500

11. FORCES 100 Points
When two groups of people play ‘tug of war’, what type of force is experienced by the rope?

12. FORCES 100 Points
Tension Force

13. FORCES 200 Points
When a snow boarder slows uses the edge of the snow board to slow down…what type of force is this?

14. FORCES 200 Points
Friction force

15. FORCES 300 Points
Two objects with different masses experience gravitational force. What are TWO ways that this gravitational force could increase?

16. 1 – the more massive the objects, the greater the force.
FORCES 300 Points
1 – the more massive the objects, the greater the force.
2- the smaller the distance between the objects, the greater the force.

17. FORCES 400 Points
Electrostatic force and magnetic force are examples of WHICH category of forces?

18. ACTION-AT-A-DISTANCE FORCE
FORCES 400 Points
ACTION-AT-A-DISTANCE FORCE

19. Identify all the forces in this story:
FORCES 500 Points
Identify all the forces in this story:
On a cold day, you rub your hands together to warm them up. You are still cold so you put on a sweater. When you pull the sweater over your head, you notice that your hair stands up on end. So you put on your toque and tie it up the strings.

20. FORCES 500 Points Friction force (hands) Electrostatic force (hair)
Tension force (toque strings)

21. WEIGHT 100 Points
How is weight different from mass? What units are used to measure weight?

22. WEIGHT 100 Points
Weight is an amount of force on an object due to gravity. It is measured in Newtons (N).

23. WEIGHT Points
A person has a mass of 50kg. On Earth the force of gravity is approximately 10 N/kg. What is this person’s weight?

24. Weight = mass x force of gravity
WEIGHT Points
Weight = mass x force of gravity
= 50 kg x 10 N/kg
= 500 N

25. WEIGHT Points
A person pushes a box across the floor. Draw a diagram and use arrows to show the forces involved (there are THREE!)

26. WEIGHT 300 Points Force applied to box (pushing)
Force of gravity on box (from Earth)
Force of gravity on Earth (from box)

27. WEIGHT Points
Describe forces that are balanced compared to forces that are unbalanced….

28. WEIGHT 400 Points Balanced forces are EQUAL in direction and strength.
Unbalanced forces are EQUAL in direction, unequal in strength.

29. WEIGHT Points
If an unbalanced force acts on an object, what are FOUR things that could happen?

30. WEIGHT 500 Points The object could begin to move
The object could speed up
The object could slow down
The object could change direction

31. PRESSURE 100 Points
Which of the following substances can be compressed?
Water vapour, liquid ammonia, solid wood, oxygen gas

32. Water vapour and oxygen gas. (liquids and solids are incompressible).
PRESSURE 100 Points
Water vapour and oxygen gas.
(liquids and solids are incompressible).

33. PRESSURE 200 Points
Why is a bad idea to keep volatile chemicals such as paint thinner in a warm area of the house? (HINT: what happens to the
particles?

34. PRESSURE 200 Points
If the can is heated, the particles get more kinetic energy and push against the walls of the can. Pressure builds inside the can and it can explode.

35. PRESSURE 300 Points
Helium balloons float upward when they are released. They gain altitude until they burst. Why do they burst?

36. PRESSURE 300 Points
The gas inside the balloon expands as it gains altitude (as the balloon goes up, the outside pressure decreases). At a certain point, the balloon expands too much and it bursts.

37. PRESSURE 400 Points
When a soccer ball is kicked, what happens to the ball?
What happens to the particles of air inside the ball?

38. PRESSURE 400 Points
The ball is deformed. The particles of air inside the ball are compressed.

39. PRESSURE 500 Points
What would happen to a balloon that was taken to the bottom of the ocean?

40. PRESSURE 500 Points
The balloon would decrease in volume (the pressure is greater at the bottom of the ocean).

41. CALCULATING PRESSURE 100 Points
A 200 N cat jumps onto a square of cement with an area of 10 m2. Calculate the pressure the cat puts on the cement.

42. CALCULATING PRESSURE 100 Points
P = F/ A
= 200 N / 10 m2
= 20 Pa

43. CALCULATING PRESSURE 200 Points
A girl stands on a stage that is 3.0 m by 3.0 m. If the girl weighs 450 N, how much pressure does she put on the stage?

44. CALCULATING PRESSURE 200 Points
P = F/A
= 450 N/ (3.0 m x 3.0 m)
= 450 N / 9 m2
= 50 Pa

45. CALCULATING PRESSURE 300 Points
A fort is built on land that is 100 m by 100 m. The fort has a mass of 30, 000 N. What is the pressure on the land?

46. CALCULATING PRESSURE 300 Points
P = F/ A
= 30,000 N / (100 m x 100 m)
= 30,000 N/ 10,000 m2
= 3 Pa

47. CALCULATING PRESSURE 400 Points
A square brick with an area of 25 cm by 25 cm is placed on the ground. The bottom of the clock has a weight of 30 N. What pressure does the brick put on the ground?

48. CALCULATING PRESSURE 400 Points
P = F/ A
= 30 N/ (0.25 m x 0.25 m)
= 30 N / m2
= 480 Pa

49. CALCULATING PRESSURE 500 Points
A baseball player stands on a square plate that is 20 cm x 20 cm. He has a MASS of 60 kg. Find the pressure he puts on the plate (HINT: the Earth exerts a gravitational force of about 10 N/kg).

50. CALCULATING PRESSURE 500 Points
The weight of the baseball player is
60 kg x 10 N/kg = 600 N
P = F/ A
= 600 N/ (0.2 m x 0.2 m)
= 600 N / 0.04 m2
= 15,000 Pa

51. List the substances in order of high to low viscosity:
VISCOSITY 100 Points
List the substances in order of high to low viscosity:
Oil, water, molasses

52. VISCOSITY 100 Points
Molasses, oil, water

53. What are TWO things that affect flow rate?
VISCOSITY 200 Points
What are TWO things that affect flow rate?

54. The shape of the particles The force of attraction between particles
VISCOSITY 200 Points
The shape of the particles
The force of attraction between particles

55. VISCOSITY 300 Points
How could you increase the flow rate of a liquid substance? What would this do to the viscosity?

56. By heating the substance. This would decrease the viscosity.
VISCOSITY 300 Points
By heating the substance. This would decrease the viscosity.

57. When you decrease the temperature, what happens to the viscosity of
VISCOSITY 400 Points
When you decrease the temperature, what happens to the viscosity of
A liquid
A gas

58. VISCOSITY 400 Points The viscosity of a liquid increases
The viscosity of a gas decreases

59. VISCOSITY 500 Points
Why would the viscosity of a gas increase when the gas is heated? Draw a diagram to explain your answer.

60. VISCOSITY 500 Points
The viscosity increases (more resistant to flow) because there are more COLLISIONS between gas particles. More collisions means more friction.

61. ADHESION & COHESION 100 Points
Why do certain fluids like water stick to certain surfaces such as glass and plastic?

62. ADHESION & COHESION 100 Points
Because of an attraction between the fluid and the surface.

63. ADHESION & COHESION 200 Points
What is it mean to say that water molecules have polarity?

64. ADHESION & COHESION 200 Points
Polarity means that one end of the molecule is slightly positive and one end of the molecule is slightly negative.

65. ADHESION & COHESION 300 Points
What is the difference between adhesion and cohesion?

66. ADHESION & COHESION 300 Points
Adhesion is the attraction of two DIFFERENT objects or fluids.
Cohesion is the strength with which the particles of an object/ fluid attract each other.

67. ADHESION & COHESION 400 Points
Why can certain insects like the water strider walk on water?

68. ADHESION & COHESION 400 Points
Because water has surface tension (the surface of water acts like a skin).

69. ADHESION & COHESION 500 Points
When water particles stick together at the surface, is this cohesion or adhesion?

70. ADHESION & COHESION 500 Points
Cohesion (the water particles are attracted to each other).

71. What is the most dangerous animal in the world?
MISCELLANEOUS 100 Points
What is the most dangerous animal in the world?

72. MISCELLANEOUS Points
The housefly. It visits animal waste and transmits more diseases than any other animal.

73. The United States consumes this much of the WORLD’s energy?
MISCELLANEOUS 200 Points
The United States consumes this much of the WORLD’s energy?

74. 25% of the world’s energy is used by the US
MISCELLANEOUS 200 Points
25% of the world’s energy is used by the US

75. MISCELLANEOUS 300 Points
Our EYES are the same size from the time we are born. But 2 body parts: our _____ and _________ never stop growing.

76. Our NOSE and EARS never stop growing!
MISCELLANEOUS 300 Points
Our NOSE and EARS never stop growing!

77. This animal is immune to cancer
MISCELLANEOUS 400 Points
This animal is immune to cancer

78. MISCELLANEOUS 400 Points
The Shark

79. This is the hardest substance in the world
MISCELLANEOUS 500 Points
This is the hardest substance in the world

80. MISCELLANEOUS 500 Points
Diamond