2020-2021学年高一下学期英语人教必修三 Unit 4 Astronomy: Warming up and reading 课件 (23张PPT)

(共23张PPT)
Unit
4
Astronomy
Let’s
enjoy
a
short
video.
What
animals
did
you
see?
What
is
this
video
mainly
about?
dinosaur
insect
amphibian
shellfish
reptile
mammal
Read
the
passage
quickly
and
match
the
main
idea
with
each
paragraph.
Para1
Para2
Para3
Para4
Para5
Fast
reading
1.
How
the
earth
formed(形成)
.
2.
The
importance
of
water
for
life.
3.
How
the
universe(宇宙)
formed.
4.
The
arrival
of
humans
and
what
they
did
to
the
earth.
5.
The
development
of
plants
and
animals
on
the
earth.
Careful
reading
★
Read
paragraph
1.
1.How
did
the
universe
begin?
The
universe
began
with
a
“Big
Bang”.
Big
Bang
Big
Bang
New
stars
Matter
Atom
Careful
reading
★
Read
paragraph
2
.
2.What
was
the
earth
like
after
the
“Big
Bang”?
3.When
did
the
earth
become
a
solid
globe?
The
earth
was
still
just
a
cloud
of
dust.
Between
4.5
and
3.8
billion
years
ago.
地球大气
The
earth’s
atmosphere
nitrogen
other
gases
carbon
dioxide
water
vapour
Water
began
to
appear
.
Careful
reading
Read
paragraph
3
.
4.
Why
was
the
earth
different
from
the
other
planets?
Because
water
remained
on
the
earth.
Read
para
4
and
put
these
pictures
in
order.
Small
plants
began
to
appear
on
the
water.
(
)
(
)Insects
and
amphibians
appeared.
(
)
Dinosaurs
appeared.
(
)Shellfish
and
other
fish
appeared.
(
)
Mammals
appeared.
(
)
Plants
began
to
grow
on
dry
land.
(
)
Reptiles
appeared.
1
2
3
4
5
6
7
Retelling
1.
Try
to
fill
in
the
blanks
with
given
words.
2.
Pay
attention
to
the
useful
connectors:
first,
then,
next,
later,
after,
when,
after
that,
however,
finally.
amphibians,
small
plants
,
dinosaurs,
Big
Bang,
land
animals,
solid
globe
,
mammals,
green
plants
,
water,
insects,
a
cloud
of
dust,
shellfish
and
fish
,
reptiles
According
to
a
theory,
first
,the
universe
began
with
a
“_________”.
After
the
“Big
Bang”,
the
earth
was
still
______________.
Many
years
later,
it
became
a
____________.
Then,
_____
appeared
and
remained
on
the
earth.
When___________
began
to
grow
on
the
water,
________________appeared.
Next,
____________grew
on
the
dry
land.
They
were
followed
by
some____________.
Some
were________.
Others,
called____________,
were
able
to
live
on
land
as
well
as
in
the
water.
Later
when
plants
began
to
grow
into
forests,
________appeared
for
the
first
time.
After
that,
some
huge
animals,
called__________,
developed.
However,
65
million
years
ago,
the
age
of
the
dinosaurs
ended,
which
made
it
possible
for
the
rise
of
__________on
the
earth.
Finally
,
the
most
important
animals
appeared
on
the
earth.
a
cloud
of
dust
Big
Bang
solid
globe
water
shellfish
and
fish
small
plants
land
animals
insects
amphibians
green
plants
reptiles
dinosaurs
mammals
Read
para5
and
answer
the
following
questions.
What
are
human
beings
doing
to
the
earth
?
They
are
putting
too
much
carbon
dioxide
into
the
atmosphere.
What
else
did
human
beings
do
to
the
earth?
pollute
the
oceans
destroy
the
forests
kill
the
protected
animals
pollute
the
air
Sometimes,
our
life
is
like
this.
This
is
the
place
where
we
live.
April
22nd
Discussion:
What
should
we
do
to
protect
the
earth
?
What
should
we
do
to
protect
the
earth
?
live
a
low
carbon
life
plant
trees
recycle
the
rubbish
clear
your
plates
Earth
mother,
l
promise
that
l
will
not
only
protect
you,
but
also
have
a
good
influence
on
others.
I
will
take
action
before
it
is
too
late
.
Homework
Write
an
article
to
call
on
people
to
protect
the
earth.