What do they look like? Place a few grains of the jelly powder on your tongue. We process materials to make them stronger, more durable, waterproof, fire-resistant, more beautiful (any sensible reason is correct). ): Do not use words like good, bad, tasty, funny or weird! The order of these activities has been changed slightly from what is suggested in CAPS so that one activity builds on the previous one. Describe the properties of the flour and water. When the pan is hot, place scoops of the batter in the pan with a large spoon. The mixture of sand, water and cement is called concrete. Bricks are hard and durable meaning they will build strong houses. This boy in the picture below has broken his arm and has a cast on. When the solution of jelly powder in water cools down, something very special happens: The solution sets, and turns into a delightfully wobbly, sweet treat! What is the process called when we make a material stronger by mixing it with another material? Add the milk mixture to the dry ingredients. We process materials to make them better and more useful. What are the properties of bricks after firing? We are therefore we are modifying the natural material to advance it. This is a very quick and easy activity to demonstrate the above concept of the finished product having different properties to the starting materials. The jelly powder mixed with the water and this changed the colour of the water. To get from the clay in Picture 1 to the pot in Picture 2, the clay was moulded into a specific shape and then left to dry. Can you see the steel bars that are sticking up into the sky? When mixing, the plaster of Paris and sand need to be in a 1:2 ratio. Scoop the wet 'concrete' into the empty hollows of the ice tray. Look at the following flow diagram about how to make a cup of tea for inspiration. Look carefully at the dry jelly powder. Learners can complete this project while you carry on with the rest of the activities and content in class. Look at all the starting materials and feel them with your fingers. In the first picture people are using spades to mix the concrete. What does it look like? The concrete looks as if there are pebbles (small stones) embedded in it. If the sand bricks were weak and easily crushed learners may respond: Sand and water is not a good material because the bricks will not be strong enough. When we combine materials, new materials are made. While you are demonstrating, learners attention could be kept on the process by involving them in counting activities. The people at Process Materials understand the company’s future rests on instilling ethical values and a positive culture. Flapjacks are really easy to make and relatively 'flop-proof'. Add the melted butter to the batter and mix. You could encourage learners to think carefully about using the word 'disappear'. They can also be cooked immediately; the batter does not need to 'rest' beforehand. (The purpose of buildings are to protect people and things. The plaster of Paris acted as binder to glue the sand grains together. How long will the footprints on the moon last? Tom needs to make enough batter for 24 flapjacks. Pour water into the measuring tub, up to the mark that you made in step 1. Who is the longest reigning WWE Champion of all time? Try to use as many of the following words as possible in your paragraph: investigation, powder, powdery, sand, water, disappear, colour, change, mixture, stiff. The properties of the new materials are often different from the properties of the materials we started with. In the next activity we will be cooking some flapjacks. Bricks are used to build houses and other buildings such as schools, shops, etc. Plaster of Paris sets quickly and gives off a considerable amount of heat in the process. Have you ever seen what a raw egg looks like? Perhaps it started to dry and become hard? (Say what the batter looked, tasted, and felt like. How does the amount of material we start with affect the amount of new material we can make? All Rights Reserved. Stainless steel is made by combining iron with other metals to make it stronger and to prevent rust. We are going to investigate another material that sets shortly. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. But it is also brittle as if you drop it on the floor it will smash. How will understanding of attitudes and predisposition enhance teaching? The word embedded will be used again later, when the notion of embedding materials in concrete for the purpose of reinforcing it, is introduced. Learners might write: The batter was runny and a pale creamy colour when it was raw, and it was stiff and pale brown, with dark brown edges when it was cooked. When did organ music become associated with baseball? Look at the picture below. Small yoghurt tubs or paper cups are good for this purpose. This unit also lays some of the groundwork for an understanding of Mixtures, which is covered in Gr. How many flapjacks could Tom make if he used only half of the batter? Why do you think the concrete needs to be reinforced with steel bars? How did the jelly mixture change when it cooled down? What evidence do we have of it still existing? Look at the pictures below. Did adding plaster of Paris to the sand make the bricks better? When the paste dries, it becomes a solid. 6 Matter and Materials. Why does the building need a structure that is extra strong? The block below contains some descriptive words that you could use: powdery, fizzy, sweet, salty, tasteless, sandy, crunchy, oily, smooth, liquid, milky, slippery, dry, grainy, bitter, frothy, runny. They are using the spades like we would use a spoon to stir sugar into a cup of tea. Real bricks are actually made by firing the bricks in a special oven called a kiln to bake them and make them hard. An electric hand mixer would be very useful for mixing the ingredients quickly, but a handheld egg beater would do the job just as well. Materials can be processed in many different ways to make new materials or products. Some learners could bring jelly to school and other could bring fruit to slice into the jelly before it sets. Bricks are made by shaping the clay into rectangle shapes and then firing them in a kiln. Often, when we mix materials together, the properties of the new material or product is different from the properties of the materials we started with. If the batter seems too thick to pour, add a little more milk. The processed materials are those that have gone through some kind of processing and that are used in the manufacture of other products. You can use the following questions to guide your research: What is the main component of stainless steel? Teacher note: Here it is important to convey the idea that the plaster of Paris acts as binder to hold the sand grains together. Help them to formulate their ideas around this by asking questions like: "Why does the mixture get warm?" Draw a flow diagram to explain how you made the flapjacks from the starting materials. This looks like it might be large building, meant for holding many people and things, like equipment, computers and furniture.)