Share UNIT 3 - Grade 4
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What is the reddish-brown substance on the iron?
Rust
Two factor causes rust?
Air/Oxygen & Water
It is a solid, the particles is very tiny so it behave like liquid, we called it ?
Powder
Salt and water are example of ?
Substance / Pure
The ice cream will melt because of ?
High Temperature/ Heat
This reaction can not turn back into the first form before they change, this property called?
Irreversible
Burning wood is example of .... reaction.
Chemical Reaction
Gold is example of ...
Pure solid
Most materials can change from one form to another when they are heated or cooled. it called ?
Change of states
The opposite of solidifiying is ?
Melting
A ..... describe what a substance or material is like, or how it behave.
Property
SUbstances to make glass?
Sand, Soda Ash & limestone
All matters is made up of ?
Particles
Oxygen is a substances that is a ...
Gas
The particles are tightly packed together in regular pattern, with the same amount os space between particle. What is this ?
Solid
The particles of solid can not move at all. True or False.
False
