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UKA Grade 7 Science
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Is gold a mixture or a substance?
Substance
Is milk a mixture or a substance?
Mixture
Is wood a mixture or a substance?
Mixture
At room temperature what state is milk
liquid
At room temperature what state is mercury
Liquid
At room temperature what state is neon
Gas
At room temperature what state is copper
Solid
At room temperature what state is H2O
Liquid
How many materials make up a substance?
One (It is pure)
What are materials made up of?
Tiny particles
When a gas is heated what happens to pressure?
It increases
What 3 factors affect diffusion speed
Temperature, Particles size and the state of the substance
When you freeze something do the particles move slower or faster?
Slower
When you heat something do the particles move slower or faster?
Faster
Can you compress a gas?
Yes, you can.
Can a liquid flow?
Yes it can.
Can a solid compress?
No, it can't
What temperature is the freezing point for water?
Zero degrees celcius
What temperature is boiling point for water?
100 degrees celcius
Changing state - Liquid to Solid
Freezing
Changing state - Gas to Liquid
Condensation
Changing state - Liquid to Gas
Evaporation
Changing state - Solid to Liquid
Melting
What state of matter?
Gas
What state of matter?
Liquid
What state of matter?
Solid