Transcript Dead Earth – Lesson 1

Ardrossan Academy
Dead Earth
Subtopic – SPACE –
Earth, Moon & sun
1
Ambition – Respect - Excellence
Lesson Title:
Earth, Sun & Moon
Learning Intention:.
To understand the movement of the
Earth and Moon around the Sun and
the effects this causes
Activity: Stellarium software
I will be successful if I can :
Explain how the Moon orbits the Earth as it orbits
the Sun, causing the phases of the Moon and the
changing seasons
2
Ambition – Respect - Excellence
DAY & NIGHT
SUNLIGHT
NIGHT
DAY
axis
• The Earth Rotates on its
axis once every 24 hours
• The side facing the Sun
is in daylight - DAY
• The side facing away is
in darkness - NIGHT
SEASONS
• Earth’s axis is tilted
• In winter we are tilted
away from the Sun
• short days, cold
temperatures
• In summer we are tilted
towards the Sun
• long days, warm
temperatures
LONGEST DAY
Arctic circle
• June 21st
• Summer Solstice
• Earth’s axis is tilted as
far towards the Sun as it
can be
• Sun does not set
anywhere above the
Arctic Circle
SHORTEST DAY
Arctic circle
• December 21st
• Winter Solstice
• Earth’s axis is tilted as
far away from the Sun as
it can be
• Sun does not rise
anywhere above the
Arctic Circle
EQUAL DAY & NIGHT
• Two days have precisely
12 hours of day & 12
hours of night EQUINOXES
• September 21st
• AUTUMNAL EQUINOX
• March 21st
• VERNAL EQUINOX
THE SUN
• The Sun is our nearest
STAR
• It is at the centre of our
SOLAR SYSTEM
• Earth is 160 million km
from the Sun
• The Sun is the source of
ALL the energy on the
Earth
THE SUN
• We get energy from the
Sun as • LIGHT
• HEAT (INFRA RED)
• The Sun also emits •
•
•
•
ULTRA VIOLET (UV)
RADIO WAVES
X-RAYS
GAMMA RAYS
THE SUN
RADIO
UV
X-RAY
• Astronomers look at all of these waves to find out
more about the sun and other stars.
THE MOON
• The Earth’s only natural
satellite
• Orbits at a distance of
360,000 km
• Orbits every 28 days
• Does NOT give off light it REFLECTS light from
the Sun
THE MOON
• Our view of the
moon changes during
its orbit
• The PHASE of the
moon depends on
how much of the
part of the moon we
see is illuminated by
the Sun
ECLIPSES
• Eclipses happen when
the Sun, Moon and
Earth line up
• There are two types of
Eclipse • SOLAR ECLIPSE • Sun ‘disappears’
• LUNAR ECLIPSE • Moon ‘disappears’
SOLAR ECLIPSE
• Earth passes into
Moon’s shadow.
• Moon ‘blocks out’ the
Sun
• Last happened Mar ‘15
LUNAR ECLIPSE
• Moon passes into
Earth’s shadow
• Moon is ‘blocked out’
• Happens several times a
year