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KS3 Science > Matter > Flashcards

Matter Flashcards

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1
Q

Complete the sentence
Almost everything is made of …

A

particles

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2
Q

What are the 3 states of matter?

A
  • solid
  • liquid
  • gas
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3
Q

What are the 3 properties of a solid?

A

❌ can’t be compressed
✔️ does not flow
fixed shape

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4
Q

What are the 3 properties of a liquid?

A

❌ can’t be compressed
✔️ does flow
shape of the container (bottom)

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5
Q

What are the 3 properties of a gas?

A

✔️ can be compressed
✔️ does flow
shape of the whole of the container

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6
Q

What 3 things do the properties of substances depend on?

A
  • what the particles are like
  • how the particles are arranged
  • how the particles move around
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7
Q

What is another way of saying “Can it be compressed?”

A

Can it be squashed?

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8
Q

Why can’t solids be compressed?

A

There is no air inside them and the particles are already touching.

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9
Q

Why can’t liquids be compressed?

A

The particles are very close together.

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10
Q

Why can gasses be compressed?

A

The particles aren’t touching and there is lots of room for air.

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11
Q

Why do solids have a fixed shape?

A

The particles are stuck together.

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12
Q

Why do liquids have a no-fixed shape?

A

The particles can move around.

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13
Q

Why do gasses have a no-fixed shape?

A

The partciles can move randomly.

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14
Q

Why can’t solids flow?

A

They have fixed positions and there are bonds between the particles.

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15
Q

Why can liquids flow?

A

They can move past each other and have no fixed shape.

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16
Q

Why can gasses flow?

A

They can move in random directions and have no fixed shape.

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17
Q

What is meant by the term “melting point”?

A

When a solid becomes a liquid

18
Q

What is meant by the term “boiling point”?

A

When the temperature makes the liquid turn into gas

19
Q

Describe what is meant by the term “evaporation”?

A

When the particles on the surface turn into a gas at any temperature.

20
Q

During evaporation - how do particles leave the liquid?

A

Just the particles at the top have the energy to escape.

21
Q

During boiling - how do particles leave the liquid?

A
22
Q

Describe 2 situations where evaporation is useful

A

drying your washing
when we sweat

23
Q

What is condensation?

A

Condensation is the change of state where** a gas turns into a liquid**. It can happen at any temperature below the boiling point of a substance.

24
Q

What is melting?

A

The change of state from solid to liquid

25
Q

What is freezing?

A

The change of state from liquid to solid.

26
Q

What is condensing?

A

The change of state from a gas to a liquid.

27
Q

What is boiling?

A

The change of state from a liquid to a gas.

28
Q

What is evaporation?

A

The change of state from a liquid to a gas.

29
Q

What is the temperature called at which a substance melts?

A

Melting point

30
Q

What is the temperature called at which a substance boils?

A

boiling point

31
Q

What is diffusion?

A

The movement of liquid or gas particles from a place of high concentration to a place of low concentration.

32
Q

What is gas pressure?

A

The force exerted by gas particles on a surface.

33
Q

Which state of matter is dense but cannot flow or be
compressed?

A

Solids

34
Q

Which state of matter is dense and can flow but
cannot be compressed?

A

Liquids

35
Q

Which state of matter is not dense but can flow and
be compressed?

A

Gases

36
Q

Why can gases be compressed?

A

There are gaps between the
particles

37
Q

Why can liquids and gases flow?

A

The particles are moving

38
Q

Why are solids and liquids dense?

A

The particles are very close
together

39
Q

Why can gases and liquids diffuse?

A

Due to the random movement
of particles

40
Q

What are changes of state usually caused by?

A

Change in temperature

KS3 Science (4 decks)

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