Starter quiz
- Water in the solid state is called...
- 'ice' ✓
- Which of the following statements is true about particles in the gas state?
- They are tightly packed.
- They have fixed positions.
- They are touching and move over and around each other.
- They move randomly. ✓
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- Put the following states of matter in order of decreasing particle movement.
- 1⇔Gas
- 2⇔Liquid
- 3⇔Solid
- What laboratory equipment is used to measure the boiling point of a substance?
- thermometer ✓
- measuring cylinder
- mass balance
- stop watch
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- What is in-between the particles in the gas state?
- air particles
- bigger gas particles as they have expanded
- empty space ✓
- more gas particles that have been created to fill the space
-
- Place these processes in the correct order as they would occur when heating water.
- 1⇔Water is in the liquid state.
- 2⇔Water is heated.
- 3⇔The temperature of the water reaches it's boiling point.
- 4⇔Water begins to boil.
- 5⇔Water is in the gas state.
Exit quiz
- What is the boiling point of water?
- 0°C
- 100°C ✓
- 50°C
- -100°C
-
- Match the terms to the descriptions.
- Condensing point⇔The temperature at which condensing occurs. ✓
- Boiling point⇔The temperature at which boiling occurs. ✓
- Boiling⇔When particles change from the liquid to gas state. ✓
- Condensing⇔When particles change from the gas to the liquid state. ✓
- What happens to the particles of a substance when it condenses?
- They move further apart.
- They move closer together. ✓
- They vibrate in fixed positions.
- They stop moving.
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- The volume of a substance ______ when reaching its boiling point.
- 'increases' ✓
- What is the relationship between the condensing and boiling points of a substance?
- They are different temperatures.
- The condensing point is higher than the boiling point.
- They are the same temperature. ✓
- The boiling point is higher than the condensing point.
-
- Select the correct statements that describe what happens during boiling.
- Particles move further apart. ✓
- The volume of the substance increases. ✓
- The particles become larger.
- Particles start to align in a fixed pattern.
- The temperature of the substance decreases.
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Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- The condensing point and boiling point are the same temperature for a substance, for water this is 100°C.
- Steam is water in the gas state.
- A substance increases in volume in the gas state when boiled.
- A substance decreases in volume in the liquid state when condensed.
- Particles move further apart when boiled and move closer together when condensed.
Common misconception
Pupils tend to think that all gases are made of air. That gases contain no particles.
Ensure that pupils gain the knowledge that the particles are the substance and between the particles there is nothing.
Keywords
Boiling - when a substance in the liquid state is heated, and gas bubbles are formed.
Boiling point - the temperature at which a substance changes from a liquid state to a gas state.
Condensing - when a substance in the gas state is cooled and changes to a liquid state.
Condensing point - the temperature at which a substance changes from a gas state to a liquid state.
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