Natural Sciences and Technology Grade 5 Term 2: Matter and Materials Processing Materials (PPT 1)

Topic 3 Processing Materials Combining Materials Gr 5 Natural Sciences and Technology – Term 2, Topic 3

Combining materials Gr 5 Natural Sciences and Technology – Term 2, Topic 3 When we combine materials, we make new materials. These are generally very different to how they started out separately as raw or natural materials. There are different ways to process materials.

Combining materials Gr 5 Natural Sciences and Technology – Term 2, Topic 3 There are many reasons why we would want to process materials. The type of materials we use will depend on what we want to produce in the end.

Processing what? Gr 5 Natural Sciences and Technology – Term 2, Topic 3 Can you think of different situations where we would want to process materials? FOOD – baking a cake (eggs, flour, butter, sugar, etc.) BUILDING – making cement, bricks etc. FUNCTIONALITY – making clay pots ART – plaster of Paris articles

Getting it right Gr 5 Natural Sciences and Technology – Term 2, Topic 3 Whenever we make something, it is important to get the mixture right. When we combine materials, their different properties work together differently. JUST THINK OF A CAKE!

Mixtures Gr 5 Natural Sciences and Technology – Term 2, Topic 3 New materials that are formed from mixing different types of materials together are called mixtures.

Raw materials Gr 5 Natural Sciences and Technology – Term 2, Topic 3 Materials that have not yet been processed but that are still in their natural state (in other words how we found them) are called raw materials. water sugar cane iron gold

Processed materials Gr 5 Natural Sciences and Technology – Term 2, Topic 3 When we combine different materials we then have processed materials. Example: stainless steel. Stainless steel is made from combining iron with other metals to make a material that does not rust. some types of taps cooking pots doctors’ instruments

Making glue Gr 5 Natural Sciences and Technology – Term 2, Topic 3 Materials: flour water 2 bowls for the flour and water a bowl for mixing pieces of paper

Making glue Gr 5 Natural Sciences and Technology – Term 2, Topic 3 What do you think will happen when we mix water and flour together? Examine the properties of the flour and water before we mix them together. Describe the properties of the flour and water. What do you think will happen when we mix them together? Now experiment with mixing different quantities of water and flour together to make a sticky paste. See if you can stick pieces of paper together using the glue that you have made Group conclusion