Unit 5D: Changing State

Unit 5D: Changing State

Unit 5D: Changing State

Unit 5D: Changing State

Changing State

Unit 5D: Changing State: Vocabulary

Unit 5D: Changing State

Some useful words

Evaporation

Condensation

Boiling temperature

State

Change of state

when a liquid changes to a vapour (gas)

when a vapour changes to a liquid

the temperature at which a liquid boils, for water it is 100 C

the 3 states are solid, liquid and gas

when a substance changes from one state to another

Unit 5D: Evaporation: L.O. 1, 2: N.C.

Unit 5D: Evaporation

Evaporation

Unit 5D: Other liquids: L.O. 3: N.C.

Unit 5D: Other Liquids

Other liquids

Unit 5D: How quick does a puddle dry up? L.O. 4, 5, 6, 7, 8: N.C.

Unit 5D: How quick does a puddle dry up?

How quick does a puddle dry up?

Which puddle do you think will dry up the quickest? Why do you think this?

What factors do you think affect how quickly a puddle dries up?

Choose one of these to investigate

Temperature Wind Volume of water

Surface area of puddle

Unit 5D: How quick does a puddle dry up? L.O. 4, 5, 6, 7, 8: N.C.

Unit 5D: How quick does a puddle dry up?

…cont

Make a prediction. What do you think you will find?

What apparatus will you need?

Explain how you will carry out your experiment?

What will you measure?

How will you record your results?

How will you keep the test fair?

Unit 5D: How quick does a puddle dry up? L.O. 4, 5, 6, 7, 8: N.C.

Unit 5D: How quick does a puddle dry up?

Support slide

The bowls represent puddles with different surface areas

Which of the bowls of water do you think will dry up the quickest? Why do you think this?

To make sure the test is fair, each ‘puddle’ must have the same volume of water in it and they need to be kept in a room at the same temperature.

The time it takes for each ‘puddle’ to evaporate needs to be recorded. We will check the ‘puddles’ every day to see which evaporates the quickest

Unit 5D: Drying: L.O. 9: N.C.

Unit 5D: Drying

Drying

How do these appliances help things dry more quickly?

Unit 5D: Condensation: L.O. 10, 11, 12: N.C.

Unit 5D: Condensation

Condensation

Where else do we see condensation?

Unit 5D: More Condensation: L.O. 13, 14: N.C.

Unit 5D: More Condensation

More Condensation

Unit 5D: Boiling Water: L.O. 15: N.C.

Unit 5D: Boiling Water

Boiling Water

Unit 5D: Melting Ice: L.O. 18, 19: N.C.

Unit 5D: Melting Ice

Melting Ice

Take the temperature of the ice and water every 5 minutes for 2 – 3 hours. Record the results.

Time Temperature

Unit 5D: Melting Ice: L.O. 18, 19: N.C.

Unit 5D: Melting Ice

…cont

What temperature did you end up at?

What do you think would have happened if the room was 10 degrees hotter?

Unit 5D: Change of State: L.O. 20: N.C.

Unit 5D: Change of State

Change of State

Unit 5D: The Water Cycle: L.O. 21, 22, 23, 24: N.C.

Unit 5D: The Water Cycle

The Water Cycle

Unit 5D: Changing State: Summary

Unit 5D: Summary

Changing state

Evap

orat

ion

Liquid > Gas

Not just water

Depends

on

Temperature

Volume of water

Wind

Surface areaBoiling

Liquids evaporate quicker

Water boils at 100ºC

Wate

r cy

cle

Reversible

Condensatio

n

Gas > Liquid

Reverse of evaporation

Air contains

water

Condenses on a cold surface

Bedroom window

Cold pop can

Melting

Freezing

Evaporating

Water evaporates from lakes

Condenses as clouds

Falls as rain

Collects in rivers

Process starts again