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Yr 8 > Topic 4 Introduction to Chemistry > Flashcards

Topic 4 Introduction to Chemistry Flashcards

1
Q

What are the 3 states of matter

A

Solid, liquid and gas

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2
Q

What are the main features of a solid

A

Particles are tightly packed together
Particles vibrate about a fixed position
Have fixed shape
Have fixed volume

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3
Q

What are the main features of a liquid

A

Particles can move around each other
Are close together
Have fixed volume
Have no fixed shape - full the container from the bottom
Cannot be compressed

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4
Q

What are the main features of a gas

A

Particles move fast and are far apart from each other
Have no fixed shape
Have no fixed volume - fill the container
Can be compressed (squashed)

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5
Q

What state has a fixed volume and fixed shape

A

solid

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6
Q

What state has a fixed volume but no fixed shape

A

liquid

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7
Q

What state has the particles vibrating about a fixed position

A

solid

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8
Q

What state has the particles able to move about each other but are still quite close together

A

gas

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9
Q

what state have particles very far apart

A

Gas

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10
Q

When a solid changes to a liquid what is this change called

A

melting

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11
Q

When a liquid changes to a gas what is this change called

A

evaporation

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12
Q

When a gas changes back to a liquid what is this change called

A

Condensation

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13
Q

When a liquid changes back to a solid what is this change called

A

Freezing

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14
Q

When a solid changes to a gas without changing into a liquid first, what is this called

A

sublimation

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15
Q

In the water cycle what type of changes happen

A

temporary changes - can change state as they changes are physical e.g. going from liquid to a gas

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16
Q

In the water cycle what change of state happens in the clouds

A

Changes from gas to liquid - condensation

17
Q

What is the test for oxygen

A

Relights a glowing splint

18
Q

What is the test for hydrogen

A

Add a lighted splint and it burns with a squeaky pop

19
Q

What is the test for carbon dioxide

A

Turns limewater milky

20
Q

Dissolving is an example of what type of change

A

Temporary

21
Q

If a solid dissolves in a liquid what is the solid said to be

A

Soluble

22
Q

If a solid does not dissolve in a liquid what is the solid said to be

A

Insoluble

23
Q

What name is given to the solid that dissolves in the solvent

A

The solid is the SOLUTE

24
Q

What name is given to the liquid that the solute can dissolve in

A

the liquid is the SOLVENT

25
Q

When a solute dissolves in a solvent what is made

A

A Solution

26
Q

If salt dissolves in water, what is the solute

A

salt

27
Q

If salt dissolves in water what is the solvent

A

Water

28
Q

If salt dissolves in water what is formed

A

A salty solution

Yr 8 (6 decks)

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