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UNIT 3 - Grade 4
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  • If the delimiter is used in a question, the question should be surrounded by double quotes: "My, question","My, answer"
  • The first answer in the multiple choice question must be the correct answer.

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