Higher:
To conduct an experiment which studies gas behaviour.
Middle:
To understand what can change with a difference of pressure, volume or temperature of a gas.
Lower:
To understand what makes up a gas and how it can be affected.
Describe what happens when you open the door of a hot oven. This could be done as a partnered task with children discussing, or a short role play / freeze-frame activity which shows how they might react when the oven door opens.
Presentation - starter slide.
Presentation
In today's film, our leading scientist Jon talks about gas behaviours.
Presentation - expert film.
Rising Water
Watch today's Mission Assignment film for more help with this activity.
Add 2-3 drops of food colouring to approximately 100ml water. Pour the coloured water into the plate. You want about a 0.5cm deep puddle on the plate. Place a tealight in the centre of the puddle. Light the candle and place an inverted glass over the top. Observe the water being drawn up by the lowering gas pressure.
Mission to Write - Behave Gas!
Today's written task involves a diary entry for each state of matter, from solid, to liquid, to gas. Children can be creative and take on the persona of that particular state of matter. Write a diary entry to show how each state of matter changes and how the molecules change and move.
Encourage children to use the rocket words from the bottom of the sheet and check for spelling, punctuation and grammar.
Rising Water
Tealight
Matches
Plates or shallow dishes
Highball tumbler glass
Water
Food colouring
Mission to Write Handout - Behave Gas!
Answer the properties of gases question and complete the Handout.
Quiz
With their talk partners, the children are to go through the quiz at the end of the presentation and answer the questions.
Assessment Trays
Ask the children to place their Handouts, notebooks, Formative Assessment Forms, Investigation Sheets, into either the Discover tray or Explorer tray
* Explain that the green tray means that the learner has understood the lesson well, and that the red tray means that the learner needs more time to practise.
* use whichever colours of tray you have in stock, or prefer to use for this.
Children to take interactive Assessment Quiz to test lesson comprehension.
Quiz in presentation
Assessment trays
Interactive quiz
Can the children explain the qualitative relationships between pressure, volume and temperature of gases?
Gas is...
Choral Response Questions/Phrase Suggestions
Gas is a natural resource found...
Gas has many uses, such as...
The Science Behind the Science
The properties of solid, liquids and gases can be understood using the kinetic theory model which takes into account the motion of the molecules they are made from. For example, in gases, the molecules move around randomly in all directions and can collide with other objects and gas molecules. Gas molecules within a sealed container exert an outwards force, or pressure, on the container because they constantly collide with the container walls. The unit for pressure is the pascal (Pa) which is equal to the force of one Newton per metre squared (N/m2). The standard atmospheric pressure at sea-level on Earth is 101,325 Pa.
If the temperature of a gas in a container is increased, the gas molecules will move around more quickly and exert a greater force on the container walls. This increases the pressure. On the other hand, if the temperature of a gas in a container is decreased then the average speed of the gas molecules will decrease, corresponding to a decrease in pressure. The average energy of the gas molecules is directly proportional to the temperature.
If the volume of a gas-filled container is decreased then the pressure will increase because the gas molecules are confined to a smaller space and are more likely to collide with the container walls. On the other hand, if the volume of a gas-filled container is increased then the pressure will decrease because the gas molecules collide with the container walls less frequently. As such, the pressure of a gas is inversely proportional to its volume.
Planet Earth - Energy sources and sustainability - I have developed my understanding of the kinetic model of a gas. I can describe the qualitative relationships between pressure, volume and temperature of gases. SCN 4-05a
Grade 6 Our Environment.
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