外研版高中英语必修1---Module5 A Lesson in a Lab- introduction课件(共27张ppt)

(共27张PPT)
Module
5
A
Lesson
in
a
Lab
Introduction
They
are
doing
experiments.
Aims
We
are
going
to:
Learn
some
English
words
for
science
and
experiments.
Learn
to
read
numbers,
fractions,
decimals
and
percentages.
Hopefully,
we
will
be
able
to
do
some
simple
operation(运算)
in
English.
liquid
solid
expand
contract
substance
mixture
oxygen
steel
n.
液体
n.
固体
vi.
膨胀
vi.
收缩
n.
物质
n.
混合物
n.
氧气
n.
钢
Listen
and
your
answers
to
the
quiz.
1.
(a)
Water
exists
as
a
solid,
a
liquid
and
a
gas.
(b)
Water
exists
as
a
solid
and
a
liquid
only.
2.
(a)
When
you
heat
a
metal,
it
expands.
(b)
When
you
heat
a
metal,
it
contracts.
3.
(a)
Steel
is
a
mixture
of
iron
and
other
substances.
(b)
Steel
is
a
mixture
of
iron
and
oxygen.
4.
(a)
Two-thirds
of
the
earth’s
surface
is
water.
(b)
50%
of
the
earth’s
surface
is
water.
5.
(a)
The
distance
of
the
sun
from
the
earth
is
25,5000
kilometres.
(b)
The
distance
of
the
sun
from
the
earth
is
150,500,500
kilometers.
6.
(a)
The
earth
is
4.6
million
years
old.
(b)
The
earth
is
4.6
billion
years
old.
7.
(a)
The
earth
is
twice
as
large
as
the
moon.
(b)
The
earth
is
forty-nine
times
larger
than
the
moon.
Classification
Put
the
words
in
pairs
or
groups.
contract
air
earth
gas
liquid
oxygen
moon
solid
moon
solid
expand
sun
1
2
3
4
air
–
gas
-
oxygen
contract
-
expand
earth
–
sun
-
moon
gas
–
liquid
-
solid
Classification
2
Put
words
in
the
right
place.
electricity
iron
metal
steel
air
glass
natural
man-made
both
electricity
iron
air
some
metals
steel
glass
some
metals
electricity
some
metals
(alloy
for
example)
Read
the
following
numbers
out
2,000,000
(two
million)
5,100,000
(five
million,one
hundred
thousand)
12,269,000
(twelve
million,two
hundred
and
thirty-nine
thousand
Practice:
52,470,383
100,000,000
365,528,462
1,000,000,000
Read
these
fractions:
1/4
(a
quarter)
1/3
(a
third)
4/5
(four-fifths)
1/10
(one
tenth)
3/4
(three
quarters)
1/2
(a
half)
2/3
(two-thirds)
5/8
(five-eighths)
9/10
(nine-tenths)
2,000,000
5,104,080,
005
365,528,462
34,456,765
12,345,678,900
thousand
million
billion
3.4
0.7
80.13
64.07
3.45
346.78
49.56
forty
nine
point
five
six
How
to
read
the
decimals?
0
zero/
naught
How
to
read
these
fractions?
?
a
quarter
two-thirds
90%
20.05%
99%
65%
77.5%
0.26%
23%
twenty
three
percent
Practice:
Read
the
following
out:
1.
1/2
of
6,000,000
2.
35,246,000
plus
12,800,000
3.
25%
of
200,000,000
(three
million)
(forty
eight
million
,sixty
thousand)
(fifty
million)
4.
260,408,396
plus
5,284,700
5.
10%
of
800,000,000
(two
hundred
and
sixty
five
million
,six
hundred
and
ninety-three
thousand,ninety-six)
(eighty
million)
Read
out
the
decimals
below:
0.5
(point
five)
2.5
(two
point
five)
18.27
(eighteen
point
two
seven)
Practice:
2
1/2
=2.5
(two
point
five)
2
1/4=2.25(two
point
two
five)
3/4=0.75(point
seven
five)
12
3/10=12.3
(twelve
point
three)
Read
and
answer
What
is
?
of
6,000,000?
How
much
is
35,246,000
plus
12,800,000?
What
is
25%
of
200,000,000?
How
much
is
260,408,396
plus
5,284,700?
What
is
?
of
1,000,500,000?
What
is
10%
of
800,000,000?
3,000,000
48,046,000
50,000,000
265,693,096
750,375,000
80,000,000
Homework
Finish
Exercises
on
P
92-93.
Preview
Reading.
加减乘除
1.加，and,
add,
plus
2+3=?
How
much
is
two
plus
three?
2+3=5
Two
plus
three
is/equals/is
equal
to/makes
five.
Two
added
to
three
equals
five．
If
we
add
two
to/and
three,
we
get
five．
加减乘除
2.减，
minus,
take
from
10－6＝?
How
much
is
ten
minus
six?
10-6=4
Ten
minus
six
is
four．
Take
six
from
ten
and
the
remainder
is
four.
Six
(taken)
from
ten
is
four．
加减乘除
3.
乘,time,
multiply
3X4＝?
How
much
is
three
times
four?
3X4=12
Three
times
four
is/are
twelve．
Multiply
three
by
four，we
get
twelve．
Three
multiplied
by
four
makes
twelve．
加减乘除
4.
除,
用divide的过去分词形式表示
16÷4=?
How
much
is
sixteen
divided
by
four?
16÷4＝4
Sixteen
divided
by
four
is
four．
Sixteen
divided
by
four
equals/gives/makes
four．
practice
3＋8=?
30－12=?
28×5=?
99÷9=?