Form 2 Chapter 6
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Form 2 Science Chapter 6
FORM 2 CHAPTER 6 AIR PRESSURE
1. Diagram 1(a) shows a container filled with air.
Air particle
Container
Diagram 1 (a)
(a) (i) What happens to the air pressure in the container when the piston is pushed downwards? ……………………………………………………………………………………………………. [1 mark] (ii) Explain your answer. …………………………………………………………………………………………………….. ……………………………………………………………………………………………………. [1 mark]
(b) Draw the arrangement of air particles in the container after the piston is pushed downwards in Diagram 1.2. Downwards
Container P
Diagram 1.2
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[1 mark] (c) Diagram 1.2 shows a gas cylinder.
Diagram 1.2 (i) In what state of matter is the gas stored in the gas cylinder? ………………………………………………………………………………………………….. [1 mark] (ii) Explain what happens to the gas particles when the gas is released from the gas cylinder. ………………………………………………………………………………………………….. [1 mark]
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2. Diagram 2 shows a suction pump.
X Y Diagram 2 (a) What is the function of a suction pump? ………………………………………………………………………………………………………. [1 mark]
(b) What happens when the suction pump is pushed onto the surface of sink as shown in Diagram 2? ………………………………………………………………………………………………………. [2 marks]
(c) What makes the suction pump to be attached firmly onto the surface of the sink? ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… [1 mark]
(d) What happens to the pressure in X and Y when the pump is pulled upwards again? ………………………………………………………………………………………………………. ………………………………………………………………………………………………………. [1 mark]
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3. Diagram 3.1 shows a pen being filled with ink.
W piston
ink
Z
Diagram 3.1
(a) What can be observed when the piston is pulled upwards? ……………………………………………………………………………………………………. [1 mark] (b) When the piston is pulled upwards, which point, W, X, Y or Z has
(i) the lowest air pressure: …………………………………………………………………………………………………… (ii) the highest air pressure: ……………………………………………………………………………………………………. [2 marks] (c) Give one example of an appliance which works using the same principle as shown in Diagram 3.1. ………………………………………………………………………………………………………. [1 mark]
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cardboard
water
(b)
(a) Diagram 3.2
(d) (i) A glass filled with water is covered with a piece of cardboard as shown in Diagram 3..2(a). What can be observed when the glass is inverted as shown in Diagram 3.2(b)? …………………………………………………………………………………………………. [1 mark] (ii)
Explain your observation in (c)(i). …………………………………………………………………………………………………. ………………………………………………………………………………………………….. [2 marks]
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4. Diagram 4.1 shows a plastic bottle attached to a suction pump. To suction pump
Plastic bottle Air Diagram 4.1 (a) (i) What happens to the bottle when air is drawn out of the bottle? …………………………………………………………………………………………… …… [1 mark] (ii) Explain your observation in (a)(i). ………………………………………………………………………………………………… ………………………………………………………………………………………………… [2 marks] (b) Diagram 4.2 shows a balloon in glass bottle connected to a suction pump. To suction pump
Glass bottle Air Balloon Diagram 4.2
(i)
What happens to the balloon when air is drawn out of the glass bottle? …………………………………………………………………………………………………
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[1 mark] (ii)
Explain your observation in (b)(i). ………………………………………………………………………………………………… ………………………………………………………………………………………………… [2 marks]
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5. Diagram 5.1 (a) shows a boy using a straw to drink from a packet drink. Diagram 5.1 (b) shows the condition of the box after he finished drinking .
Diagram 5.1(b)
Diagram 5.1(a)
(a) What causes the box to collapse as shown in Diagram 5.1(a)? ……………………………………………………………………………………………………… [1 mark] (b) (i) What should the boy do to regain the shape of the box? ….……………………………………………………………………………………………… [1 mark] (ii) Explain your answer in (b)(i). …………………………………………………………………………………………………… …………………………………………………………………………………………………… [2 marks] (c) Diagram 5.2 shows how medicine is being drawn into a syringe.
Diagram 5.2
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(i) What can be observed when the piston is pulled upwards? …………………………………………………………………………………………………… [1 mark] (ii) What happens to the volume of air in the syringe when the piston is pulled upwards? ……………………………………………………………………………………………………. [1 mark] (iii) How does this affect the air pressure in the syringe? ……………………………………………………………………………………………………. [1 mark] (iv) What pushes the medicine into the syringe? ……………………………………………………………………………………………………. [1 mark]
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FORM 2 CHAPTER 6 AIR PRESSURE
1. Diagram 1(a) shows a container filled with air.
Air particle
Container
Diagram 1 (a)
(a) (i) What happens to the air pressure in the container when the piston is pushed downwards? ……………………………………………………………………………………………………. [1 mark] (ii) Explain your answer. …………………………………………………………………………………………………….. ……………………………………………………………………………………………………. [1 mark]
(b) Draw the arrangement of air particles in the container after the piston is pushed downwards in Diagram 1.2. Downwards
Container P
Diagram 1.2
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[1 mark] (c) Diagram 1.2 shows a gas cylinder.
Diagram 1.2 (i) In what state of matter is the gas stored in the gas cylinder? ………………………………………………………………………………………………….. [1 mark] (ii) Explain what happens to the gas particles when the gas is released from the gas cylinder. ………………………………………………………………………………………………….. [1 mark]
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Form 2 Science Chapter 6
2. Diagram 2 shows a suction pump.
X Y Diagram 2 (a) What is the function of a suction pump? ………………………………………………………………………………………………………. [1 mark]
(b) What happens when the suction pump is pushed onto the surface of sink as shown in Diagram 2? ………………………………………………………………………………………………………. [2 marks]
(c) What makes the suction pump to be attached firmly onto the surface of the sink? ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… [1 mark]
(d) What happens to the pressure in X and Y when the pump is pulled upwards again? ………………………………………………………………………………………………………. ………………………………………………………………………………………………………. [1 mark]
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3. Diagram 3.1 shows a pen being filled with ink.
W piston
ink
Z
Diagram 3.1
(a) What can be observed when the piston is pulled upwards? ……………………………………………………………………………………………………. [1 mark] (b) When the piston is pulled upwards, which point, W, X, Y or Z has
(i) the lowest air pressure: …………………………………………………………………………………………………… (ii) the highest air pressure: ……………………………………………………………………………………………………. [2 marks] (c) Give one example of an appliance which works using the same principle as shown in Diagram 3.1. ………………………………………………………………………………………………………. [1 mark]
100
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Form 2 Science Chapter 6
cardboard
water
(b)
(a) Diagram 3.2
(d) (i) A glass filled with water is covered with a piece of cardboard as shown in Diagram 3..2(a). What can be observed when the glass is inverted as shown in Diagram 3.2(b)? …………………………………………………………………………………………………. [1 mark] (ii)
Explain your observation in (c)(i). …………………………………………………………………………………………………. ………………………………………………………………………………………………….. [2 marks]
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4. Diagram 4.1 shows a plastic bottle attached to a suction pump. To suction pump
Plastic bottle Air Diagram 4.1 (a) (i) What happens to the bottle when air is drawn out of the bottle? …………………………………………………………………………………………… …… [1 mark] (ii) Explain your observation in (a)(i). ………………………………………………………………………………………………… ………………………………………………………………………………………………… [2 marks] (b) Diagram 4.2 shows a balloon in glass bottle connected to a suction pump. To suction pump
Glass bottle Air Balloon Diagram 4.2
(i)
What happens to the balloon when air is drawn out of the glass bottle? …………………………………………………………………………………………………
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Form 2 Science Chapter 6
[1 mark] (ii)
Explain your observation in (b)(i). ………………………………………………………………………………………………… ………………………………………………………………………………………………… [2 marks]
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5. Diagram 5.1 (a) shows a boy using a straw to drink from a packet drink. Diagram 5.1 (b) shows the condition of the box after he finished drinking .
Diagram 5.1(b)
Diagram 5.1(a)
(a) What causes the box to collapse as shown in Diagram 5.1(a)? ……………………………………………………………………………………………………… [1 mark] (b) (i) What should the boy do to regain the shape of the box? ….……………………………………………………………………………………………… [1 mark] (ii) Explain your answer in (b)(i). …………………………………………………………………………………………………… …………………………………………………………………………………………………… [2 marks] (c) Diagram 5.2 shows how medicine is being drawn into a syringe.
Diagram 5.2
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(i) What can be observed when the piston is pulled upwards? …………………………………………………………………………………………………… [1 mark] (ii) What happens to the volume of air in the syringe when the piston is pulled upwards? ……………………………………………………………………………………………………. [1 mark] (iii) How does this affect the air pressure in the syringe? ……………………………………………………………………………………………………. [1 mark] (iv) What pushes the medicine into the syringe? ……………………………………………………………………………………………………. [1 mark]
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