2. SEASONS
There are four different seasons in a year
because the Earth´s axis is tilted. As the Earth
moves around the Sun, some parts of the Earth
get different amounts of light depending on the
moment of the year.
3. SEASONS
SUMMER AND WINTER
When we are in summer or in witer is because the Northern hemisphere
is pointing to the Sun or pointing away from the Sun.
WHY DOES THIS HAPPEN?
Winter
Summer
4. SEASONS
SUMMER AND WINTER
The hemisphere that is pointing to the Sun gets
more heat and light than the hemisphere that is
pointing away from the Sun.
Winter
Summer
5. SEASONS
SPRING AND AUTUMN
During spring and autumn the poles aren´t
pointing to the Sun. So both hemispheres get
the same amount of light. REMEMBER!!!
The Earth is always tilted. In
this drawing we see it straight
due to the oint of view.
We change the point of view
to see the Earth next to the
Sun instead of in front of and
behind the Sun.
6. MOON
From the Earth we always see the same half of the
Moon.
WHY?
Because the Moon takes the same time to do a complete spin on its axis
and to do a complete lap around the Earth (28 days).
Imagine the Moon is
a clock that goes
around another
clock(the Earth).
Every time it moves
a quarter around
the big clock, it also
spins a quarter on
itself.
7. MOON
We see different Moon phases.
WHY?
The Moon is a
satellite, a non
luminous celestial
body. We see it
because it reflects
the light of the Sun.
Depending on the
place the Moon is
,according to the
Earth and the Sun, we
can see different
illuminated areas.
New Moon Full Moon
First quarter
Last quarter
8. ECLIPSES
WHAT ARE ECLIPSES?
They are shadows produced by one non luminous
celestial body on another non luminous celestial
body.
From the Earth we can see Lunar or Solar
eclipses.
How are they produced?
9. ECLIPSES
LUNAR ECLIPSES
As we said before, eclipses are shadows. A lunar
eclipse is the shadow of the Earth covering the
Moon.
10. ECLIPSES
SOLAR ECLIPSES
Solar eclipses are produced because the Moon
produces a shadow on the Earth. People who are
in the place of the Earth where the Moon
shadow is, can see the eclipse.
11. If you need more information or you
are still having doubts, have a look at
the videos on the blog, ask me by e-
mail or by a comment on the blog or
check your unit.
