Pour the plaster of Paris into the mixing tub. Touch the jelly powder with your finger. Other benefits include increased productivity, standardized working conditions leading to better quality laminates, and health and safety benefits from reduced materials handling. This is a very quick and easy activity to demonstrate the above concept of the finished product having different properties to the starting materials. It might get a bit messy for learners to each do their own mixing, so you could do it as a demonstration at the front of the class. When we mixed it with water, the jelly powder looked as if it disappeared but we knew it was still there because it changed the colour of the water. The people at Process Materials understand the company’s future rests on instilling ethical values and a positive culture. Materials can be processed in many different ways to make new materials or products. Name a few places where bricks are used. The jelly powder has been processed into something new! Place a little bit of each ingredient on your tongue. When did organ music become associated with baseball? When the jelly and water mixture cooled down, it became stiff. Add the sand to the plaster of Paris in the mixing tub. While you are demonstrating, learners attention could be kept on the process by involving them in counting activities. How did the stones get inside the concrete? Bricks are used to build houses and other buildings such as schools, shops, etc. Plaster of Paris can be bought at most pharmacies and hardware shops. ): Do not use words like good, bad, tasty, funny or weird! There are also many reasons why we would need to process materials into new materials. Who is the longest reigning WWE Champion of all time? Flapjacks are really easy to make and relatively 'flop-proof'. Try to use as many of the following words as possible in your paragraph: investigation, powder, powdery, sand, water, disappear, colour, change, mixture, stiff. Why do you think the concrete was mixed with stones? Great idea Tom, your friends will love that! To make jelly, we must dissolve jelly powder in hot water. (Hint: Why would the garage floor need to be extra strong?). 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. You want them to realise that things feel warm when they release energy/heat. .. "When the materials were mixed.". If access to the library or internet is a problem, encyclopedias, books and magazines could be made available in class. This looks like it might be large building, meant for holding many people and things, like equipment, computers and furniture.) Tom would need to make 24 flapjacks (3 x 8 = 24). Have you ever tasted jelly? We are going to investigate another material that sets shortly. Tom is making flapjacks for his friends, Sophie, Farrah and Jojo. The main requirement may be the strength of a particular application, but depending on the working environment and behavior, several other factors may have to be considered.In the selection of materials, a systematic approach is necessary to select the best materials for a particular application. What do they look like? Add 1 1/2 cups of milk to the eggs and mix well. Ensure that learners take note of the observation that the mixture becomes warm when it sets. or "If we cook 6 batches and each batch has 3 flapjacks, how many flapjacks would we have?" Heat the pan on the hot plate and add a little bit of oil. Let's look at more ways to combine and process materials. All Rights Reserved. What is the birthday of carmelita divinagracia? Before it was cooked, the batter tasted sweet and raw (floury), but after it was cooked it tasted like cake. Leave all the bricks overnight to set. In the next activity we will be cooking some flapjacks. You can refer back to this activity to remind them about the properties of plaster of Paris. We process materials to make them better and more useful. Some of the instruments that doctors use to operate on sick people are made of steel, and so are the pots and pans that we use when we prepare food. In a separate bowl, whisk together the eggs. In the next section the ideas that were developed around preparing (processing) food are extended to other contexts. The jelly powder mixed with the water and this changed the colour of the water. How did the 'concrete' mixture feel after you mixed it? Describe the properties of the paste you have made. How will understanding of attitudes and predisposition enhance teaching? Perhaps it started to dry and become hard? Now experiment with mixing different quantities of water and flour together to make a sticky paste. Notice how the egg white is transparent when it is raw, and white when it is cooked. This unit also lays some of the groundwork for an understanding of Mixtures, which is covered in Gr. Why does the building need a structure that is extra strong? What details make Lochinvar an attractive and romantic figure? Fill them all to the same height so that your finished bricks all have the same size. (Hint: Is stone a strong material? 6 Matter and Materials. Write the properties of the batter in the table below. At the end of the activity learners are required to draw a flow diagram. Which is your favourite? It would be worth spending some time on its explanation here. Electrical energy does the work required for mixing the concrete. In the first picture people are using spades to mix the concrete. The jelly could also be set in small yogurt containers or ice cube trays so that each learner can enjoy it the next day! Make the top surface of each brick flat so that they will be easy to stack later. If you are not near a beach or sandy area where you could collect sand for the 'bricks', you could look out for a building site, and ask if you could have a bucket full of sand for your science class.