24. A physical change is a change in how matter looks,
but not the kind of matter it is.
• Tear
• Folded • Mixture
• Solution
25. Physical change:
Examples of physical changes that happen in everyday life include:
• sugar dissolving in coffee
• water boiling or freezing
• chopping vegetables
• breaking a glass
• carving wood
• making a paper plane!
Can you think of some more?
38. Let’s explore some ways Aboriginal and Torres Strait Islander
Peoples have physically changed materials in the past…
39. This wood has been carved and hollowed out by
Aboriginal peoples to make a dish to carry things.
Images courtesy of Joseph Sambono. Used with permission.
40. These tools have been made from wood by Aboriginal peoples.
The wood is shaped, polished and carved.
Image courtesy of Joseph Sambono. Used with permission.
41. These didgeridoos have been made by termites hollowing out
the wood. Aboriginal peoples decorate and polish the wood.
Images courtesy of Joseph Sambono. Used with
permission.
42. These stones have been split, sharpened,
ground or carved to make tools.
Images courtesy of Joseph Sambono. Used with permission.
43. A piece of bamboo has been cut and bent to make tongs, for
moving hot stones and hot food, by Torres Strait Islander peoples.
Images courtesy of Joseph Sambono. Used with permission.
44. Palm leaves are torn to make strips, then woven to make things
such as baskets, mats and fans.
Example from Torres Strait Islands.
Images courtesy of Joseph Sambono. Used with
permission
46. Indigenous Australians weave, stitch and
tie pandanus palm leaves to make bags,
baskets and mats.
matbag
Images courtesy of Joseph Sambono. Used with
permission.
basket
47. Coconut shells have been cut, carved, shaped and polished to make beads and
decorations for these Fijian necklaces. A stone has also been carved for decoration.
Images courtesy of Helen Brown. Used with
permission.
48. Grasses have been dried and
tied to cover this shelter in Fiji.
Tiny holes have been drilled in shells and
they have been threaded together to make
this necklace.
Images courtesy of Helen Brown. Used with
permission.
50. Wood has been cut, chopped, chipped, carved,
chiselled and sanded to make this turtle in Fiji.
51. Grasses have been plaited, twisted and tied by Indigenous
Australian peoples to make these ropes stronger.
52. Palm leaves have been plaited and woven by Torres Strait
Islander peoples to make this basket stronger.
53. This basket has been made by Indigenous Australians. The bark of a
tree has been folded, pleated and tied to make it strong.
Resin has been added to make it both water resistant and stronger.
54. Plant materials such as palms and grasses have been plaited
and twisted by Indigenous Australians to make rope,
and then tied to make nets.
Images courtesy of Joseph
Sambono. Used with permission.
Teacher Notes:
View in Slideshow mode.
Advise students you will be talking about the reasons why we would change the properties of materials in our everyday lives.
Teacher Notes:
Discuss each note as it is revealed.
What properties does the material have prior to the change?
What is the change action applied?
What properties does the material have after the change?
Teacher Notes:
Discuss foods that taste differently when they are cooked.
What are their properties before the change?
What change action is applied?
What are their properties after the change?
Other reason example = cook an egg so we can put it on a sandwich – what would an uncooked egg look like on a sandwich?
Teacher Notes:
Discuss foods that taste differently when they are cooked.
What are their properties before the change?
What change action is applied?
What are their properties after the change?
Other reason example = cook an egg so we can put it on a sandwich – what would an uncooked egg look like on a sandwich?
