Starter quiz
- Which of the following are not made of cells?
- Fish
- Snail
- Lion
- Rocks ✓
- Grass
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- Which one statement about the human body is true?
- The body contains cells.
- The body is a cell.
- The body is made up of cells. ✓
- There are no cells in the body.
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- Starting with the largest, put these in size order.
- 1⇔Heart
- 2⇔Cell
- 3⇔Nucleus
- 4⇔Oxygen
- Match the particles with their correct arrangement.
- Solid particles are⇔close and fixed in position. ✓
- Liquid particles are⇔close, randomly arranged and can move around each other. ✓
- Gas particles are⇔far apart, randomly arranged and free to move. ✓
- What does the word particle refer to?
- atoms and molecules ✓
- atoms and cell organelles
- cells and cell organelles
- molecules and cells
- atoms and cells
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- What is the particle model?
- Describes the arrangement of particles in solids, liquid and gases. ✓
- Describes how particles can change.
- Describes the arrangement of cell organelles within cells.
- Describes how to make new particles.
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Exit quiz
- What can particles in a liquid and gas do that enables them to diffuse?
- 'move' ✓
- Which of the following describe the movement of particles in liquids and gases?
- Constantly moving ✓
- Move in one direction
- Move randomly ✓
- Collide with each other ✓
- Stop moving when they are evenly spread out
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- Which best describes diffusion?
- Movement of particles from an area of lower to higher concentration.
- Movement of particles from an area of higher to lower concentration. ✓
- Movement of particles from one concentration to another.
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- Why is diffusion a passive process?
- Requires particles to spread out.
- Requires no additional energy. ✓
- Requires additional energy.
- Requires particles to be in the gas state.
- Requires particles to be in the liquid state
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- Which of the following are examples of particles that may be found in the cell cytoplasm?
- Mitochondria
- Nucleus
- Oxygen ✓
- Glucose ✓
- Chloroplasts
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- Match the words to their definitions.
- Concentration⇔The number of particles in a volume of liquid or gas. ✓
- Concentration gradient⇔A difference in concentration. ✓
- Net movement⇔The overall movement of particles from one area to another. ✓
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- All substances, including the cell cytoplasm and substances within it, are made up of particles.
- These particles move in random directions and collide all the time.
- Concentration is the number of particles in a volume of liquid or gas.
- The net movement of particles is down a concentration gradient.
- Diffusion is the passive movement of particles of a substance from an area of higher to lower concentration.
Common misconception
Particles want or intend to spread out; particles stop moving after equilibrium has been reached.
Animations show particles in continuous random motion.
Keywords
Passive process - A passive process doesn’t require any additional energy.
Concentration - Concentration is the number of particles in a volume of liquid or gas.
Concentration gradient - A concentration gradient is a difference in the concentration of particles from one area to another.
Net movement - Net movement is the overall movement of particles from one area to another.
Diffusion - Diffusion is the net movement of a substance from an area of higher concentration to an area of lower concentration.
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