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Introduction
In the unit 'Gases around us' # learnt that gases are material and these can be distinguished from solids and liquids by their properties. ^ has also learnt about the uses of some important gases and where gases are found. ~ experimental and investigative work focused on * making and repeating ~ observations and relating ~ observations and conclusions to ~ scientific knowledge and understanding. The work in this unit also offered * opportunities to use ~ scientific knowledge and understanding to explain everyday phenomena related to air and other gases.
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Groups
Section 1: Grouping solids and liquids

^ can identify characteristic properties of solids and liquids.
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Air
Section 2: Understanding air

^ has used the phenomena related to moving air e.g. on kites, parachutes, drying washing and to the effects of pumping up inflatable objects to support the idea that air is real.
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Sponges
Section 3: Thinking about powders and sponges

^ was able to describe how bubbles appear. 
^ is able to identify that bubbles in powders and sponges appear from the spaces between the particles, and with help, ^ can suggest they are air.
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Gases
Section 4-6: Checking observations and gases

^ is able to explain why it is helpful to repeat observations.
^ has used measuring jugs or cylinders to make measurements of volume.
^ is able to repeat ~ measurements to check ~ results by using the same quantity of dry soil each time.
^ was able to explain that bubbles appear when ^ added water to dry soil because water pushed the air out of the spaces between the particles of soil. 
^ can name several gases and identify one way in which each is useful to us.
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Evaporation
Section 7: Evaporation

^ is able to identify the process which takes place when water changes to a gas as evaporation.
^ has identified a range of contexts in which water evaporates .
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Gases
Sections 8-10: Properties of gas

^ was able to explain that ^ could smell things because the gases entered ~ nose.
^ has explained that ^ can smell many liquids because gases from the liquid travelled through the air to ~ nose when some of the liquid evaporated.
^ is able to explain that natural gas can cause explosions, and if ^ can smell it then ^ is detecting a gas leak. 
^ has described a number of differences between liquids and gases. 
# was able to summarise the key differences between solids, liquids and gases. ^ identified aspects such as ease of flow, and whether solids, liquids and gases retain their own shape and volume when moved to different containers.
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