Changing Materials

Today we did Science all day! We first reminded ourselves of words we learned before such as glass, metal, clay, wood and wool. We also reminded ourselves of what man-made and natural means.

We then had a look at a lot of different materials. We thought about how we could change the materials. We also thought about whether these changes were reversible or irriversable.

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We discussed what we found out with our learning partners. Alex taught us how sand is used to make glass, using heat.

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We than had a fantastic session experimenting with changing lots of materials such as instant mash, powder paint, corn flour, playdough and ice.We discussed which were solids and liquids.

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When we found something out and we wanted to share it with the class, we rang the chime bar. Hal explained to us how salt helps ice to melt quicker. It extracts the water and makes the ice crumble.

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In the afternoon we watch a kettle boil. We saw that the water evaporated and turned into steeam. When the steam was caught in a cold bowl, it turned back to water. This is called condensation.Steam is not a liquid or solid, it is a gas.

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We also watched how salt dissolved into hot water. We are going to wait and see if this is a irreversable change.

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Can you tell us more about materials and how you can change them. Do you change the temperature? Do you apply a force? Are the changes reversable or irreversable?

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