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Natural & Processed Materials.

This educational resource focuses on the observable properties of natural and man-made materials. Students engage in hands-on activities such as identifying items by touch, classifying materials based on shape, size, density, and texture, and exploring the uses of composite materials like cars. The curriculum also covers physical and chemical changes in materials, demonstrating concepts through experiments with phases of matter, with fun activities like making mixtures and exploring filtration techniques. Ideal for interactive learning about the world around us.

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Natural & Processed Materials.

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  1. Natural & Processed Materials. Term 3, 2008

  2. Observable properties • Secret bags and boxes. • Identify items by touch. • Natural and Man-made • Tennis ball, eggs, sweet and other potatoes, rocks. • Look at property of each and group accordingly- • Shape • Size- microscopic • Texture- cotton wool & concrete • Density- heavy stone, light polystyrene ball • Temperature- feathers, wool, stones & concrete (in fire, sun, cold water), ice • Use- glass, wood, metal & plastic • Look at composite items, like a car and list all the materials and their uses • Personal preference. Why? • Test strength, hardness, stretchability.

  3. STRENGTH

  4. ElasticityTake a 10 cm piece, and stretch it and measure again.

  5. SizeHow could you measure the size safely.

  6. HARDNESS0 very soft 10 very hardUse a stick and rub for 1 minute.

  7. Properties

  8. CHANGE OF STATESolid, liquid and gas Interesting mixtures. Clay in water Fizzy drinks Cornflour and water Volcanic rock

  9. PHYSICAL STATE • 2 kids cling together. • Wet a kid. • Melt ice. • Boil water. • Change shape and colour of • Playdough • Wire • Sponge • Elastic • Heat up Milo to drink. • Put bubbles in water to play.

  10. CHEMICAL CHANGE • Cooked eggs • Burnt wood • Burn Mg ribbon • Cycad nuts

  11. Chemical Reactions & Mixtures (solutions, suspensions & sediments)

  12. Drama • Separating people into groups • Moiety • Dhuwa & Yirritja • Gender • Using drama to show separation using colours. • Filter • Magnet • Sedimentation • Evaporation • Every day examples of these: • Filter: sports bag, kitchen colanders and sieves, teabags, and coffee filters Lawn mower and car filters • Magnet: generator, electro-magnet • Sedimentation: sand settles to the bottom of puddles, use for car • Evaporation: dry clothes

  13. Separating mixtures • Filter • Magnet • Evaporation • Sedimentation and decanting

  14. Assessment-seperating mixtures. • Provided with a mixture of: • Coarse sand • Iron filings • Salt crystals

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