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
Spider silk
Fishing line
Rope
Pandanus

4. Elasticity Take a 10 cm piece, and stretch it and measure again.
Rubberised cord
Wool
Fishing line

5. Size How could you measure the size safely.
The Northern Territory
Truck
Spider’s leg
Scabies mite

6. HARDNESS 0 very soft 10 very hard Use a stick and rub for 1 minute.
Polystyrene block
Sedimentary rock
Igneous rock
Cement

7. Properties Temperature Mass Texture Use Cold Hot Light Heavy
Rough Smooth
Stone
Concrete
Ice
Feather
Wood

8. CHANGE OF STATE Solid, liquid and gas
Particles
Shape
Property
Rigid
Pour
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)
Water and sand
Water and cordial
Water and salt
Water and chalk dust
Water and pancake mix
Water and clay
Sand and iron filings

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