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21 Nsɛmmisa

4.3.1.1 Density of materials

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4.3.1.2 Changes of state

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4.3.2.1 Internal Energy

4.3.2.2 Temperature changes in a system and specific heat capacity

4.3.2.3 Chanes of state and specific latent heat

4.3.3.1 Particle motion in gases

4.3.3.2 Pressure in gases

4.3.3.3 Increasing the pressure of a gas

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What is the formula for density?

Density = Volume / Mass

Density = Mass / Volume

Density = Mass x Volume

Density = Mass + Volume

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3.

A small gold object weighs 200 grams and its volume is 10 cubic centimeters. Can you calculate its density?

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4.

A cube of steel has a mass of 800 grams and a volume of 100 cubic cm. Calculate the density.

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What does this tell you about the density?

If the object floats, the object is more dense than water.

If the object sinks, the object is more dense than water

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16.

Which change of state happens when a gas loses energy and changes into a liquid?

melting

condensation

vaporization

freezing

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17.

What happens to the particles of a substance when the substance freezes?

They slow down.

They stop moving.

They stay the same.

They speed up.

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18.

If a substance has a melting point of -157 degrees Celsius and a boiling point of -25 degrees Celsius, what state of matter will it be in at room temperature (21 degrees C)?

A Solid

B Liquid

C Gas

D Not enough information

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19.

Which state has particles tightly packed together?

Solid

Gas

Liquid

Brittle

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20.

Label the states during melting and evaporating / boiling

Mmuae Afoforo a Wobɛpaw:

Solid and liquid

liquid and gas

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Mmuae Afoforo a Wobɛpaw:

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