ЖИ көмекші
"Изменение агрегатного состояния вещества", 8 класс, презентация
Жүктеу
#1 слайд
Solids, Liquids and Gases
1 слайд
Solids, Liquids and Gases
#2 слайд
What different types of materials are there?
Liquid metal
Solid used in aircraft
Solid used to coat steel cans
Intoxicating liquid
Radioactive solid
Solid that rusts
Unreactive gas
Solid used by Roman plumbers
MMercury
AAluminium
TTin
EEthanol
RRadium
IIron
AArgon
LLead
Different substances
Aluminium Lead
Argon Iron
RadiumEthanol
TinMercury
What are the names of the substances described in this
table? (The first letters spell out another word for
‘substance’.)
2 слайд
What different types of materials are there? Liquid metal Solid used in aircraft Solid used to coat steel cans Intoxicating liquid Radioactive solid Solid that rusts Unreactive gas Solid used by Roman plumbers MMercury AAluminium TTin EEthanol RRadium IIron AArgon LLead Different substances Aluminium Lead Argon Iron RadiumEthanol TinMercury What are the names of the substances described in this table? (The first letters spell out another word for ‘substance’.)
#3 слайд
There are millions of different materials.
But we can put them all into a small
number of groups by looking at their
properties.
One way of classifying materials is to say
whether something is a solid, a liquid or
a gas. These are called the three states
of matter.
3 слайд
There are millions of different materials. But we can put them all into a small number of groups by looking at their properties. One way of classifying materials is to say whether something is a solid, a liquid or a gas. These are called the three states of matter.
#4 слайд
Look at the picture.
Then write down the name of one
solid, one liquid and one gas.
4 слайд
Look at the picture. Then write down the name of one solid, one liquid and one gas.
#5 слайд
Three states of
matter
solid liquid gas
At room temperature most substances exist
in one of three physical states.
5 слайд
Three states of matter solid liquid gas At room temperature most substances exist in one of three physical states.
#6 слайд
Solid, liquid or gas?
6 слайд
Solid, liquid or gas?
#7 слайд
Liquids change shape,
gases fill space, solids
stay the same
Liquids change shape to fit what
they are in. Lumps of solid keep the
same shape. A gas will spread out
to fill any space.
7 слайд
Liquids change shape, gases fill space, solids stay the same Liquids change shape to fit what they are in. Lumps of solid keep the same shape. A gas will spread out to fill any space.
#8 слайд
Look at the pictures. Explain why
Sadia can’t pour the milk.
8 слайд
Look at the pictures. Explain why Sadia can’t pour the milk.
#9 слайд
Some things are solid, some things are
liquid and some things are gas. Solids,
liquids and gases have different
properties.
For example, gases and liquids will
flow.
Solids do not flow.
9 слайд
Some things are solid, some things are liquid and some things are gas. Solids, liquids and gases have different properties. For example, gases and liquids will flow. Solids do not flow.
#10 слайд
Solids
Solids stay the same shape.
Unless it gets hotter or colder, a
solid also stays the same size. It
takes up the same amount of
space. We say that its volume
stays the same.
The diamonds in the photograph
have been part of the Crown
Jewels for about 100 years. The
hooks are fixed on to hold the
diamonds in place. Explain why
they are as easy to put in place
now as they were when they were
first made.
10 слайд
Solids Solids stay the same shape. Unless it gets hotter or colder, a solid also stays the same size. It takes up the same amount of space. We say that its volume stays the same. The diamonds in the photograph have been part of the Crown Jewels for about 100 years. The hooks are fixed on to hold the diamonds in place. Explain why they are as easy to put in place now as they were when they were first made.
#11 слайд
Liquids
You can pour a liquid from one
container to another. So liquids do
not have a shape of their own. They
fill up the container from the bottom
and take on its shape.
But liquids do stay the same volume
unless they get hotter or colder.
a) Describe how the shape of the
liquid changes when it is poured into
the different containers shown in the
drawing. Use the words 'ball-shaped',
'tube-shaped', and 'cubic'.
b) What happens to the volume of the
liquid as it is poured into the different
containers?
11 слайд
Liquids You can pour a liquid from one container to another. So liquids do not have a shape of their own. They fill up the container from the bottom and take on its shape. But liquids do stay the same volume unless they get hotter or colder. a) Describe how the shape of the liquid changes when it is poured into the different containers shown in the drawing. Use the words 'ball-shaped', 'tube-shaped', and 'cubic'. b) What happens to the volume of the liquid as it is poured into the different containers?
#12 слайд
Gases
Like a liquid, a gas does
not have its own shape.
But a gas is different from
a liquid because it spreads
out into all the space in
the container.
Look at the diagrams. How
do we know that the
brown gas spreads out to
fill all the space when the
tap is opened?
12 слайд
Gases Like a liquid, a gas does not have its own shape. But a gas is different from a liquid because it spreads out into all the space in the container. Look at the diagrams. How do we know that the brown gas spreads out to fill all the space when the tap is opened?
#13 слайд
Answer the questions. For
each question write down
why you think the
substance is a solid, liquid
or gas.
(a) What does
the brown
substance do
when the
plate is
removed?
13 слайд
Answer the questions. For each question write down why you think the substance is a solid, liquid or gas. (a) What does the brown substance do when the plate is removed?
#14 слайд
Answer the questions. For
each question write down
why you think the
substance is a solid, liquid
or gas.
(b) What
happens to
the shape of
the meths
when the
bottle is
tilted?
14 слайд
Answer the questions. For each question write down why you think the substance is a solid, liquid or gas. (b) What happens to the shape of the meths when the bottle is tilted?
#15 слайд
Answer the questions. For
each question write down
why you think the
substance is a solid, liquid
or gas.
(c) What
happens to
the shape of
the ice cube
when the
board is
tilted?
15 слайд
Answer the questions. For each question write down why you think the substance is a solid, liquid or gas. (c) What happens to the shape of the ice cube when the board is tilted?
#16 слайд
Some substances are
heavier than others
The table shows how heavy different
substances are. To make the table fair, the
figures are for one cubic centimetre of
each substance. One cubic centimetre is
about the size of a small dice.
Solids and liquids are heavier than gases.
We say that solids and liquids are denser
than gases.
16 слайд
Some substances are heavier than others The table shows how heavy different substances are. To make the table fair, the figures are for one cubic centimetre of each substance. One cubic centimetre is about the size of a small dice. Solids and liquids are heavier than gases. We say that solids and liquids are denser than gases.
#17 слайд
Which solids are denser than water?
Which solids are less dense than water?
How many times more dense is:
(a)iron than water?
(b)water than cork?
17 слайд
Which solids are denser than water? Which solids are less dense than water? How many times more dense is: (a)iron than water? (b)water than cork?
#18 слайд
A suitcase full of air is a lot
of lighter then one full of
gold.
18 слайд
A suitcase full of air is a lot of lighter then one full of gold.
#19 слайд
Floating and sinking
Cork floats on water because it is a
less dense substance than water.
A lump of iron sinks in water
because it is a denser substance
than water.
Look at the table again. Which
solids will float on water?
Copy the diagram of oil and water.
Underneath the diagram, copy and
complete this sentence.
The oil floats on the water because
it is less __________ than the water.
19 слайд
Floating and sinking Cork floats on water because it is a less dense substance than water. A lump of iron sinks in water because it is a denser substance than water. Look at the table again. Which solids will float on water? Copy the diagram of oil and water. Underneath the diagram, copy and complete this sentence. The oil floats on the water because it is less __________ than the water.
#20 слайд
WHAT YOU NEED TO REMEMBER
(Copy and complete using the key
words)
Solid, liquid and gas
Solids have their own_____________. Liquids and qases can
_____________ shape.
A gas spreads out to fill any __________________.
Gases and liquids will ____________________through pipes.
Solids and liquids are heavier substances than gases; we
say they are ____________________________.
Something floats on a liquid if it is _____________________
than the liquid.
A lump of iron _________ ___________ in water because it is
a denser substance than water.
20 слайд
WHAT YOU NEED TO REMEMBER (Copy and complete using the key words) Solid, liquid and gas Solids have their own_____________. Liquids and qases can _____________ shape. A gas spreads out to fill any __________________. Gases and liquids will ____________________through pipes. Solids and liquids are heavier substances than gases; we say they are ____________________________. Something floats on a liquid if it is _____________________ than the liquid. A lump of iron _________ ___________ in water because it is a denser substance than water.
#21 слайд
© Boardworks Ltd 20041 of 20 © Boardworks Ltd 200521 of 25
Glossary
matter – The stuff that everything is made of.
gas – The state of matter in which particles move
quickly in all directions and rarely touch each other.
liquid – The state of matter in which particles are
randomly arranged and touch each other.
solid – The state of matter in which particles are in a
fixed arrangement and touch each other.
flow -
shape -
space -
denser -
21 слайд
© Boardworks Ltd 20041 of 20 © Boardworks Ltd 200521 of 25 Glossary matter – The stuff that everything is made of. gas – The state of matter in which particles move quickly in all directions and rarely touch each other. liquid – The state of matter in which particles are randomly arranged and touch each other. solid – The state of matter in which particles are in a fixed arrangement and touch each other. flow - shape - space - denser -
#22 слайд
22 слайд
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