💧 Liquid Pressure Class 8

Liquid pressure is the force per unit area exerted by a liquid at any point within it, mainly due to the weight of the liquid column above that point.

Class 8 Physics Liquid Pressure Pascal’s Law Buoyant Force

📄 Page-wise Image Material

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🎯 Learning Map

🎯 Learning Objectives

• Understand liquid pressure and its properties.
• Learn Pascal’s law.
• Study factors affecting liquid pressure.
• Relate concepts to daily life.

🧩 Competencies

• Conceptual Understanding
• Observation Skills
• Analytical Thinking
• Application Skills
• Scientific Reasoning

📊 Learning Outcomes

• Explains pressure in liquids.
• States Pascal’s law.
• Describes effect of depth and density.
• Identifies buoyant force and applications.

Liquid Pressure

Liquid pressure increases with depth and acts in all directions.

🌈 5W-1H + 1U

🔴 What: Pressure exerted by liquids on surfaces.

🟠 Why: To understand behavior of liquids.

🟡 When: In dams, swimming and daily life.

🟢 Where: Water bodies and containers.

🔵 Who: Scientists, engineers and students.

🟣 How: It depends on depth and density.

⚫ 1U: Pressure increases with depth and acts in all directions.

💧 Interactive Liquid Pressure Simulator

Move the slider to increase or decrease depth. Notice how pressure increases as depth increases.

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Depth Level: 70 | Pressure: Medium

Concept: Liquid pressure increases with depth and also depends on the density of the liquid.

📝 Liquid Pressure MCQ Worksheet

Select your answers and click submit. Correct and wrong answers will be highlighted automatically.

1. Liquid pressure is mainly caused by: Weight of liquid column Colour of liquid Shape of water Air only

2. Liquid pressure increases with: Depth Colour Smell Surface design

3. Pressure in liquids acts: Only downward Only upward In all directions Only sideways

4. Dams are thicker at the bottom because: Pressure is greater at greater depth Water is colder there Sunlight is less Fish live there

5. Salt water exerts more pressure because it is: Denser Lighter Colourless Hotter

6. Buoyant force helps objects to: Float Burn Disappear Freeze

7. Pascal’s law is related to: Pressure in fluids Light Sound only Magnetism

8. Liquid pressure depends on: Depth and density Colour and smell Taste only Shape of label

9. Liquids flow to the same level due to: Hydrostatic property Friction only Magnetism Evaporation

10. Liquid molecules move: Freely Only in straight lines Never Only upward

🧠 HOTS Questions

Click each question to reveal the answer.

1. Why are dams thicker at bottom?

Because pressure increases with depth.

2. Why does salt water exert more pressure?

Because it is denser.

3. Why do objects float?

Due to buoyant force.

4. Why do liquids flow to the same level?

Due to hydrostatic property.

5. Why does pressure act in all directions?

Because liquid molecules move freely.

Concept by Teacher Ritu, Designed by Shaleen Shekhar