📚 Part 1: Fluid Properties

1. Which of the following is the best definition of surface tension?

The force that makes fluids flow downward

The elastic-like force on the surface of a liquid caused by cohesive forces between molecules

The resistance of a fluid to flow

The pressure exerted by a fluid at rest

2. A paper clip can float on water due to:

Its low density

Surface tension

Buoyancy

Water pressure

3. Which fluids are more compressible under pressure?

Liquids only

Gases only

Both liquids and gases equally

Neither liquids nor gases

4. Fill in the blanks:

_____________ is the measure of a fluid's resistance to flow, while _____________ is the upward force exerted by a fluid on an immersed object.

5. Check all properties that affect how fluids behave:

Density

Viscosity

Temperature

Surface tension

Compressibility

🔬 Part 2: Fluid Principles and Applications

6. Explain Pascal's Law in your own words and give one practical example:

7. A water strider (insect) can walk on water because of:

Its extremely light weight

Surface tension of water

Air bubbles trapped under its feet

Special waterproof coating

8. Match each principle with its correct application by writing the letter:

Principles:

A. Archimedes' Principle B. Bernoulli's Principle C. Pascal's Law

____ Hydraulic car brakes

____ Ships floating on water

____ Airplane wing lift

9. Describe two ways that understanding fluid properties helps solve real-world problems in the Philippines:

10. Why is water nearly incompressible while air in a balloon can be easily compressed? Explain using particle theory:

🌊 Part 3: Observation and Analysis

11. During your experiment, you observed objects floating and sinking in water and oil. Complete the table based on typical results:

Object	Behaviour in Water	Behaviour in Oil	Reason
Wooden block	________________	________________	________________
Metal coin	________________	________________	________________

12. Design a simple experiment to demonstrate surface tension using household materials. List your materials and procedure:

Fluid Properties and Behaviour

Fluid Properties and Behaviour

📚 Part 1: Fluid Properties

🔬 Part 2: Fluid Principles and Applications

🌊 Part 3: Observation and Analysis

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