资源简介

(共20张PPT)
Period 5
What is our world made of
How do things change
Think and answer.
What is our world made of
Everything in our world is a solid, liquid or gas.
Everything in our world is a solid, liquid or gas.
Ice and metal are solids.
Water and milk are liquids.
Air and steam are gases.
But things change.
Read and discuss.
What are solids, liquids and gases
Watch and check.
Solids, liquids and gases
Listen and follow.
State Things
Solid
Liquid
Gas
ice
metal
Everything in our world is a solid, liquid or gas.
Ice and metal are solids.
Water and milk are liquids.
Air and steam are gases.
But things change.
metal
Fill in the blanks.
water
milk
air
steam
... and ... are ...
(solids/liquids/gases)
Share and say.
State Things
Solid
Liquid
Gas
ice
metal
water
milk
air
steam
Read and discuss.
Water can change into different states. What can it become
The ice is a solid.
Now it’s melting.
It’s changing into a liquid.
Listen, read and answer.
Is the ice a solid, a liquid or a gas
Look at the ice. What is happening
What is the ice changing into
Read and match.
The water is a liquid.
Now it’s freezing.
It’s changing into a solid.
a.
b.
a
b
The water is a liquid.
Now it’s boiling.
It’s changing into a gas.
Look and answer.
Is the water a solid, a liquid or a gas
Look at the water. What is happening
What is the water changing into
freezing
The water is a liquid.
Now it’s freezing.
It’s changing into a solid.
Listen and follow.
Look and choose.
Now it’s ___________.
a. boiling b. freezing
The water is a ________.
a. solid b. liquid c. gas
It’s changing into a ______.
a. solid b. liquid c. gas
b
a
c
The water is a liquid.
Now it’s boiling.
It’s changing into a gas.
Listen and follow.
Look and say.
What can water change into
Everything in our world is a solid, liquid or gas.
Many things can change from one state to another.
Water can change into a solid or a gas.
Listen and follow.
What is our world made of
Everything in our world is a solid, liquid or gas.
Ice and metal are solids.
Water and milk are liquids.
Air and steam are gases.
But things change.
The ice is a solid.
Now it’s melting.
It’s changing into a liquid.
The water is a liquid.
Now it’s freezing. It’s changing into a solid.
The water is a liquid.
Now it’s boiling. It’s changing into a gas.
Think and discuss.
What things around us can change
How do they change
When chocolate melts,
it changes into a liquid.
When we put the fruit juice
in the freezer, it turns into a lolly.
…
When we mix the sugar and cream, it becomes a mixture.
When does water change into a gas
When does it change into a solid
Water changes into a gas when it is very hot/when it boils.
It changes into a solid when it is very cold/when it freezes.
Think and fill.
Cause Effect
1. The water boils. a. It changes into .
2. The water freezes. b. It changes into ________.
3. The ice melts. c. It changes into ________.
a gas
a solid
a liquid
melt
Share and say.
Water can change.
It changes into ... when ...
Cause Effect
1. Water boils. a. It changes into .
2. Water freezes. b. It changes into ________.
3. Ice melts. c. It changes into ________.
a gas
a solid
a liquid
melt
1. 朗读Unit 7 P70 Extend的课文。
2. 复述课文。
Assignments:
5
7

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