辽宁省抚顺市第十二中学高中英语新人教版必修3 Unit 4 Astronomy教案（无答案）

Unit
4
Astronomy
Pre-reading
.1.
The
origin
of
life
on
earth
is
a
question
that
interests
astronomers.
What
do
you
know
about
it
How
old
is
the
universe
(several
billion
years
ago)
How
old
is
the
Earth
(between
4.5
and
3.8
million
years
ago)
Which
were
the
first
creatures
or
plants
on
Earth
2.
Each
religion
and
culture
has
its
own
ideas
about
how
life
began
on
earth.
What
do
you
know
In
China,
we
all
know
that
Pangu
separates
the
sky
from
the
earth.
Questions:
1.
What
do
we
mean
when
we
say
we
are
studying
a
subject
scientifically
Or
what’s
the
correct
attitude
towards
science
We
should
be
objective,
not
superstitious.
2.
What’s
the
correct
way
to
prove
a
scientific
idea
We
should
design
experiments
to
test
it
for
several
times.
Then
we
can
analyze
the
results
and
draw
a
conclusion
at
last.
3.
What
are
the
most
important
skills
we
need
to
be
real
scientists
Careful,
objective
and
logical,
draw
conclusions
from
the
experiments
and
not
impose
conclusions
on
the
data.
(impose…on…
把…强加于…)
Reading
I.
Read
the
passage
carefully
and
analyse
its
structure.
Write
down
the
main
idea
for
each
paragraph.
Para1
A
widely
accepted
theory
about
the
formation
of
the
universe
Para2
The
formation
of
the
earth
Para3
The
importance
of
water
for
life
Para4
The
development
of
plants
and
animals
on
the
earth
Para5
The
arrival
of
humans
and
their
impact
on
the
earth
II.
Read
the
text
and
fill
in
the
blanks
in
the
following
form.
Time
What
happened
Big
Bang
______
began
to
form
and
combine
to
create
stars
and
other
bodies.
Between
4.5
and
3.8
billion
years
ago
●Dust
settled
into
a
solid
and
______
globe.●The
earth
exploded
to
produce
its___________
.●The
continued
________
of
water
allowed
the
earth
to
dissolve
harmful
gases
and
_____
into
the
oceans
and
seas.
Many
millions
of
years
later
●The
first
small
plants
on
the
surface
of
the
water
produced_______
.●Early
_______
and
all
sorts
of
fish
appeared.●Green
plants
began
to
grow
on
land.
●Insects
and___________
appeared.
IV.
True
(T)
or
False
(F).
1.
The
earth
appeared
before
the
Big
Bang
happened.2.
The
original
atmosphere
consisted
of
nitrogen
and
oxygen.
3.
Water
also
appeared
on
other
planets
like
Mars,
but
it
disappeared
later.
4.
Life
began
in
water
and
then
on
land.
5.
Mammals
appeared
before
the
development
of
dinosaurs.
How
life
began
on
earth
is
one
of
the
biggest
puzzles
that
scientists
found
hard
to
solve.
What
other
puzzles
are
hidden
in
the
passage
Find
them
out
and
do
some
research.