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Grades 6, 7 and 8 - Science - Middle School - Pressure
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Avg score: 29% • Most missed: “What has to happen to the force exerted over a fixed area if the pressure double…”

Pressure is an effect which occurs when a force is applied on a surface. Pressure is the amount of force acting on a unit area. In order to calculate pressure, we need to know the force applied over a known area. The smaller the surface area, the bigger the pressure. Pressure is measured in Pascals. To calculate the area a force acts on to produce a pressure, you need to use the following equation: area = force/pressure.

Grades 6, 7 and 8 - Science - Middle School - Pressure
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25 Questions

1. What is force measured in?
2. Another box weighs 60N. The base dimensions are 2m by 1m. What is the pressure on the ground?
3. Box A has a weight of 20N. It is put on top of box B. These two boxes exert a pressure of 60Pa. The area box B covers is 3m2. Find weight of box B.
4. A 60,000N elephant can stand on one foot! The pressure it exerts is 240,000Pa. What is the area of its foot?
5. If pressure is measured in pascals, Pa, and force in newtons, N, then area is measured in .......
6. What is pressure measured in?
7. Camels have big feet so they don't sink into soft sand because .......
8. What has to happen to the force exerted if the area doubles but the pressure is unchanged?
9. A sharp knife cuts well because .......
10. A girl is wearing a trainer on one foot and a stiletto on the other! Which exerts the most pressure on the ground?
11. The size of an African elephant's foot is 40cm by 50cm. It weighs 64,000N. When standing on the ground, what is the pressure it exerts?
12. What has to happen to the force exerted over a fixed area if the pressure doubles?
13. The bottom of a box has dimensions 2m by 3m. What is the weight of the box to produce a pressure of 20Pa?
14. A box weighs 60N. The dimensions of the base are 3m by 2m. What is the pressure of the box on the ground?
15. A skier weighs 600N and exerts a pressure of 2,500Pa on the snow. What is the area of the skis?
16. What force is needed on an area of 4m2 to produce a pressure of 16Pa?
17. If pressure increases then .......
18. The dimensions of a ski are 8cm x 150cm. What is the weight of a skier standing on 2 skis to produce a pressure of 2,500Pa?
19. A box weighs 100N. It exerts a pressure of 25Pa on a table. What is the area of the box in contact with the table?
20. What force is needed on an area of 5m2 to produce a pressure of 25Pa?
21. A student weighs 600N. The area of one foot is 0.01m2. If she stands on two feet what is the pressure on the ground?
22. A four legged table exerts a pressure of 8,000Pa on the ground. Each leg has an area of 0.01m2. What is the weight of the table?
23. One box weighing 60N is put on top of one weighing 120N. The pressure they exert is 180Pa. What is the area touching the ground?
24. The bottom of a box has an area of 5m2. What is the weight of the box to produce a pressure of 20Pa?
25. The dimensions of the base of a box are 80cm by 100cm. It weighs 400N. What is the pressure on the ground?

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