Starter quiz
- Which of the following words means ‘apply force to make something smaller’?
- shrink
- depress
- compress ✓
- compound
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- Which of the following types of motion can be described as a vibration?
- rapid movement in a circle
- rapid movement in any direction
- repeating movement up and down ✓
- repeating movement left and right ✓
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- The three states of matter are liquid, solid and ______.
- 'gas' ✓
- Which of the following statements about atoms is correct?
- All atoms are identical to each other.
- They are similar in size to a living cell, such as a red blood cell.
- They cannot be seen using microscopes that are used in schools. ✓
- The nucleus of an atom is the same size as the nucleus of a living cell.
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- Which of the following diagrams accurately represents the arrangement of the particles in a liquid?
- Which of the following describe the weight of an object?
- the amount of matter in the object
- a gravitational force that acts on the object ✓
- the force exerted on the object by Earth's gravitational pull ✓
- a measure of the number and size of particles in the object
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Exit quiz
- Which of the following statements about particles are correct?
- All atoms are particles. ✓
- All particles are atoms.
- All molecules are particles. ✓
- All particles are molecules.
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- Which of the following statements about fluids are correct?
- Air is a fluid at room temperature. ✓
- Petrol is a fluid at room temperature. ✓
- In all fluids, the particles are far apart.
- In all fluids, the particles can move around each other. ✓
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- Which of the following statements explains why it is difficult to compress a liquid?
- The particles are heavy.
- The particles are close together. ✓
- The particles are relatively large.
- The particles are moving very fast.
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- Which of the following statements explains why all fluids exert pressure?
- The particles in fluids vibrate.
- The particles in fluids are close together.
- The particles in fluids are moving around. ✓
- Fluids are made of a different type of particle from solids.
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- The following diagrams all show the same solid cuboid, resting on a table in different positions. In which diagram does the block exert the greatest pressure on the table?
- A swimming pool has the same depth everywhere. Its area is 1250 m² and it contains water with a weight of 2 500 000 N. The pressure caused by the water on the bottom of the pool is ______ N/m².
- '2000' ✓
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- The particles in liquids and gases move very quickly and randomly in every direction; they are both fluids.
- Particles in liquids are very close together; the gaps between particles in gases are much larger than the particles.
- The pressure at any point in a fluid is the same size in every direction.
- The particles in a fluid exert pressure on a surface by colliding with it.
- Pressure is calculated using the equation: density = force ÷ surface area.
Common misconception
The pressure at a particular depth depends on the shape of the container the liquid is in.
Demonstrate different shaped containers with the same depth of water in each and an identical shaped hole 1 cm above the base of each. Identical sized jets of water should shoot out of each hole as the pressure at each hole is (initially) the same.
Keywords
Atom - the building block of matter; even small pieces of matter have trillions of atoms
Particle - a term used to describe atoms or molecules which make up matter
Fluid - a liquid or a gas; fluids can flow as the particles can move around each other
Pressure - caused by a force acting over an area on a surface; it can be calculated using: pressure = force ÷ area
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