Educational worksheet on air pressure, explaining concepts and experiments.
A worksheet titled "Chapter 6: Air Pressure" with questions about air pressure, the kinetic theory of gases, and experiments demonstrating air pressure using a glass of water and a straw.
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Show Answer Key & Explanations
Step-by-step solution for: CHAPTER 6 Air Pressure | PDF | Gases | Pressure
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Show Answer Key & Explanations
Step-by-step solution for: CHAPTER 6 Air Pressure | PDF | Gases | Pressure
Let's solve the worksheet step by step and fill in the blanks with correct answers, then explain each answer.
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#### 6.1 Air Pressure
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1. Air pressure is the air around us _________ on the _________ of the objects that are in it.
✔ Answer:
Air pressure is the air around us pushing on the surfaces of the objects that are in it.
🔹 *Explanation:* Air pressure is the force exerted by air molecules colliding with surfaces. The air pushes against all surfaces of objects in contact with it.
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2. Atmosphere pressure is the force per unit area exerted by the air that makes up the atmosphere.
✔ This statement is already complete and correct — no blanks to fill.
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3. The existence of air pressure can be explained by the Kinetic Theory of Gases:
a) A gas consists of many particles which are far apart from each other
b) The particles move randomly in all directions
c) The particles continuously hit the walls of the container and bounce back
d) A force is exerted by the particles on the walls of the container
e) This force produces a pressure on the wall of the container
✔ Explanation:
According to the Kinetic Theory of Gases, gases consist of tiny particles (atoms or molecules) that are in constant random motion. These particles collide with the walls of their container, creating a force. Since pressure = force / area, these collisions produce pressure.
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4. To show that air exerts pressure:
(a)
*Image: A glass filled with water, covered with cardboard, inverted, and water stays inside.*
> a) The water from the glass does not fall out because the atmospheric pressure acts on the cardboard to support the water in the glass.
✔ Explanation:
When the glass is full of water, covered with a card, and turned upside down, the atmospheric pressure pushing upward on the cardboard is greater than the downward force of the water’s weight. This prevents the water from falling out.
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(b)
*Image: Drinking through a straw — hand covers top of straw, lifts it out of liquid, water stays in the straw.*
> b) The water stays in the straw because the air pressure acts on the bottom of the straw to support the water in the straw.
✔ Explanation:
When you suck on a straw, you reduce the air pressure inside the straw. The higher atmospheric pressure outside pushes the liquid up into the straw. When you lift the straw out and cover the top (blocking air entry), the column of water stays suspended because atmospheric pressure pushes upward on the bottom of the straw (from the liquid surface below), balancing the weight of the water.
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1. Air pressure is the air around us pushing on the surfaces of the objects that are in it.
3a. particles
3b. randomly
3c. bounce
3d. walls
3e. pressure
4a. does not fall out; atmospheric pressure
4b. bottom
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- Air pressure is caused by the weight of the air above us and the constant motion of air molecules.
- The Kinetic Theory of Gases explains how moving particles collide with surfaces, creating pressure.
- Real-life demonstrations like the inverted glass and drinking straw prove that atmospheric pressure supports liquids against gravity.
These experiments illustrate how invisible air pressure plays a crucial role in everyday phenomena.
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CHAPTER 6: AIR PRESSURE
#### 6.1 Air Pressure
---
1. Air pressure is the air around us _________ on the _________ of the objects that are in it.
✔ Answer:
Air pressure is the air around us pushing on the surfaces of the objects that are in it.
🔹 *Explanation:* Air pressure is the force exerted by air molecules colliding with surfaces. The air pushes against all surfaces of objects in contact with it.
---
2. Atmosphere pressure is the force per unit area exerted by the air that makes up the atmosphere.
✔ This statement is already complete and correct — no blanks to fill.
---
3. The existence of air pressure can be explained by the Kinetic Theory of Gases:
a) A gas consists of many particles which are far apart from each other
b) The particles move randomly in all directions
c) The particles continuously hit the walls of the container and bounce back
d) A force is exerted by the particles on the walls of the container
e) This force produces a pressure on the wall of the container
✔ Explanation:
According to the Kinetic Theory of Gases, gases consist of tiny particles (atoms or molecules) that are in constant random motion. These particles collide with the walls of their container, creating a force. Since pressure = force / area, these collisions produce pressure.
---
4. To show that air exerts pressure:
(a)
*Image: A glass filled with water, covered with cardboard, inverted, and water stays inside.*
> a) The water from the glass does not fall out because the atmospheric pressure acts on the cardboard to support the water in the glass.
✔ Explanation:
When the glass is full of water, covered with a card, and turned upside down, the atmospheric pressure pushing upward on the cardboard is greater than the downward force of the water’s weight. This prevents the water from falling out.
---
(b)
*Image: Drinking through a straw — hand covers top of straw, lifts it out of liquid, water stays in the straw.*
> b) The water stays in the straw because the air pressure acts on the bottom of the straw to support the water in the straw.
✔ Explanation:
When you suck on a straw, you reduce the air pressure inside the straw. The higher atmospheric pressure outside pushes the liquid up into the straw. When you lift the straw out and cover the top (blocking air entry), the column of water stays suspended because atmospheric pressure pushes upward on the bottom of the straw (from the liquid surface below), balancing the weight of the water.
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✔ Final Answers:
1. Air pressure is the air around us pushing on the surfaces of the objects that are in it.
3a. particles
3b. randomly
3c. bounce
3d. walls
3e. pressure
4a. does not fall out; atmospheric pressure
4b. bottom
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🔍 Summary Explanation:
- Air pressure is caused by the weight of the air above us and the constant motion of air molecules.
- The Kinetic Theory of Gases explains how moving particles collide with surfaces, creating pressure.
- Real-life demonstrations like the inverted glass and drinking straw prove that atmospheric pressure supports liquids against gravity.
These experiments illustrate how invisible air pressure plays a crucial role in everyday phenomena.
Parent Tip: Review the logic above to help your child master the concept of air pressure worksheet.
