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Materials' properties, Material Changes, Changes ...
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Mention two example of freezing!
making ice cube, making jelly, freezing the ice cream, etc
Observe the pictures! What are the properties of the object in the picture? (Mention 2!)
flexible, soft, heat isolator, electric isolator
Which change of state that gains heat?
A and B
What is happening when my ice cream changes from a solid to a liquid?
melting
What is evaporation?
When water turns into a vapor (water -> gas)
When gases lose heat they will condense into ....
liquids
Water begins to freeze at ....
0°C (zero degree Celcius)
What is the boiling point of water?
100 degree Celcius (100°C)
When ice gains heat, it changes to ....
liquid
Mention two correct and safe ways to handle materials and household items!
labelling them properly. using them for their intended purpose. keeping them in suitable places. disposing used materials properly .
Mention one object that has properties: non-magnetic, hard, rigid, transparent.
window, glass, bowl, etc
Observe the pictures! What are the properties of the object in the picture? (Mention 2!)
strong, rigid, fixed, electric isolator, heat isolator
Which trash bin where we throw the leftover foods?
organic (recyclable waste)
Physical or Chemical Change? Cutting an orange into wedges.
physical change
Observe the pictures! Rusted iron is chemical change because ....
•The colour , odour , shape or structure of the original materials change. •The new materials formed cannot be changed back to their original forms.
Is this an example of a physical or chemical change?
physical change
Wood that is burning is .... (physical change/ chemical change)
chemical change
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