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Unit 4D: Solids and Liquids. Solids, liquids and how they can be separated Group the materials according to your own criteria. T. Unit 4D: Solids and Liquids. Some useful words Melt Freeze Solidify Dissolve Solution Undissolved Filter. when a solid changes to a liquid.

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Unit 4d solids and liquids l.jpg
Unit 4D: Solids and Liquids

Solids, liquids and how they can be separated

Group the materials according to your own criteria

T

Unit 4D: Solids and liquids


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Unit 4D: Solids and Liquids

Some useful words

Melt

Freeze

Solidify

Dissolve

Solution

Undissolved

Filter

when a solid changes to a liquid

when a liquid changes to a solid

a liquid changes to a solid

when a solid “disappears” in a liquid

a liquid with a solid dissolved in it

when a solid doesn’t disappear

a way of getting undissolved solids out of a liquid

V

Unit 4D: Solids and liquids


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Unit 4D: Solids and Liquids

Solids and Liquids

Group the materials according to your own criteria

There are 2 main groups – liquids and solids

A

Unit 4D: Solids and liquids: L.O. 1, 2 : N.C.


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Unit 4D: Solids and Liquids

…cont

Are all the liquids colourless?

What will happen to a liquid if the container it is in is changed?

Can you spill the solids?

What happens if you tilt the bottle the liquids are in?

A

Unit 4D: Solids and liquids: L.O. 1, 2 : N.C.


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Unit 4D: Solids and Liquids

…cont

Are the following Solids or Liquids. Try to give a reason for your answers:

  • Cotton wool

  • Sand

  • Shampoo

  • Rice

  • Jelly

  • Soup

  • Syrup

D

Unit 4D: Solids and liquids: L.O. 1, 2 : N.C.


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Unit 4D: The shape and volume of liquids

The shape and volume of liquids

D

Unit 4D: The shape and volume of liquids: L.O. 3, 4: N.C.


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Unit 4D: Powders

Powders

Some solids consist of very small pieces, such as sand, are sometimes called powders. They behave in a similar way to liquids

D

Unit 4D: Powders: L.O. 5: N.C.


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Unit 4D: One material, two states

One material, two states

Many materials can exist as a solid or a liquid. When it changes from solid to liquid we say it melts. When it changes from a liquid to a solid we say it solidifies or freezes

D

Unit 4D: One material, two states: L.O. 6, 7, 8: N.C.


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Unit 4D: Melting solids

Melting solids

D

Unit 4D: Melting solids: L.O. 9, 10: N.C.


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Unit 4D: Melting solids

…cont

Melting and solidifying or freezing are changes that can be reversed and are the reverse of each other

D

Unit 4D: Melting solids: L.O. 9, 10: N.C.


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Unit 4D: Mixing Solids

Mixing Solids

How can the 2 solids be separated?

A

Unit 4D: Mixing Solids: L.O. 11, 12: N.C.


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Unit 4D: Mixing Solids

…cont

How do you think you can separate:

Dried peas and paper clips.

Stones and salt.

Why do you think each method will work?

A

Unit 4D: Mixing Solids: L.O. 11, 12: N.C.


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Unit 4D: Mixing Solids and Liquids

Mixing Solids and Liquids

Investigate what happens when the each of the following is mixed with water:

Salt Sand

Instant coffee Marbles

Sugar Plaster of Paris

Flour Paint

Record your results

I

Unit 4D: Mixing Solids and Liquids: L.O. 13, 14: N.C.


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Unit 4D: Separating the undissolved solids

Separating the undissolved solids

How can we separate the marbles from the water

Would this method work with the sand?

A

Unit 4D: Separating the undissolved solids: L.O. 15, 16: N.C.


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Unit 4D: Separating the undissolved solids

…cont

Filter paper is like a sieve but the holes are very, very small - only very small particles like water can pass through the holes.

A

Unit 4D: Separating the undissolved solids: L.O. 15, 16: N.C.


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Unit 4D: Filtering dissolved solids

Filtering dissolved solids

Using filter paper and a funnel, filter the salt water you made.

Do you think the salt will be filtered out like the sand was? Try to give a reason for your answer

If the solid has dissolved it means that the particles must be smaller than the water particles so they can ‘hide’ between them. This means they can get through the filter paper

A

Unit 4D: Filtering dissolved solids: L.O. 17, 18, 19, 20: N.C.


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Shape of container

Keep shape

Fixed volume

Fixed volume

Can flow

Don’t flow

Solids

Liquids

Very small solids

Different temperatures

Pour

Solids and liquids

Powder

Melting and freezing

Behave like liquids

Water freezes at 0ºC

Shape of container

Some materials can exist as a solid or a liquid

Mixing

Solids

Separate by sieving

Cooling

State

Liquid > Solid

Dissolved

Freezing (solidifying)

Liquid and solid

Undissolved

Filter

Heating

Solid > Liquid

Melting

Unit 4D: Summary

S

Unit 4D: Solids and liquids: Summary