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Sunlight and space travel презентация
Содержание
- 1. Sunlight and space travel
- 2. Distances If you drive on a motorway
- 3. If we could keep on and on
- 4. Light and heat comes from the
- 5. Light travels very, very fast! Guess how
- 6. It takes 8 minutes
- 7. Shadows Light travels in a straight
- 8. Shadows How do they form? Sun
- 9. We can make shadows ! - by
- 10. Day and Night A day + a
- 11. The Earth is a ball (or sphere)
- 12. Day and night Daylight in the UK
- 13. At midday here It is dawn in the USA It is dusk in India
- 14. As the Earth spins the position
- 15. Shadows move during the day Watch the
- 16. The Sun appears to move across the
- 17. The Solar Pyramid will act as a sundial
- 18. The seasons: the Sun provides light
- 19. Summer and winter In winter
- 20. Summer and winter The earth is tipped
- 21. The Moon The Moon
- 22. The Moon The Moon is not a
- 23. The Moon travels round the Earth
- 24. Bad astronomy in films What is wrong
- 25. The Moon The Moon is
- 26. Sometimes the Sun does not shine during
- 28. An eclipse of the Sun When the
- 30. An Eclipse of the Moon Full
- 31. What have we learned?
- 32. Space exploration Solar transit of the International
- 33. Larger! Space shuttle Space station
- 34. The girl who named Pluto
- 35. New Horizons at Pluto (simulation) It
- 36. Keep asking questions! There is lots to find out!
Distances If you drive on a motorway at 70 miles per hour in one hour you may get to Stafford. Steady speed! If you keep on driving after 3 hours
Слайд 2Distances
If you drive on a motorway at 70 miles per hour
in
one hour you may get to Stafford.
Steady speed!
If you keep on driving after 3 hours you would reach London.
Steady speed - no stops!
Steady speed!
If you keep on driving after 3 hours you would reach London.
Steady speed - no stops!
Слайд 3If we could keep on and on - -
If you
could drive to the Moon
at 70 miles per hour,
230,000 miles or about 400,000 km
it would take you 3400 hours,
or 140 days.
at 70 miles per hour,
230,000 miles or about 400,000 km
it would take you 3400 hours,
or 140 days.
Слайд 4Light and heat
comes from the Sun
It is a long way
away !
146 million km or 93 million miles
If you could drive to the Sun at 70 miles per hour
it would take over 50 000 days.
= 150 years
– longer than we live !
146 million km or 93 million miles
If you could drive to the Sun at 70 miles per hour
it would take over 50 000 days.
= 150 years
– longer than we live !
Слайд 5Light travels very, very fast!
Guess how long it takes for light
to
come from the SUN to the Earth.
8 years
8 days
8 hours
8 minutes
come from the SUN to the Earth.
8 years
8 days
8 hours
8 minutes
Слайд 6It takes 8 minutes for light to reach us from the
Sun!
Light travels 300 000 kilometres through space every second!
Слайд 7Shadows
Light travels in a straight line.
If something gets in its path
the light is blocked.
A shadow is formed.
A shadow is formed.
Слайд 9We can make shadows !
- by blocking out the light.
Changing positions
varies the size of the shadow.
If you are close to the lamp, the shadow is large.
If you are close to the screen, the shadow is smaller.
If you are close to the lamp, the shadow is large.
If you are close to the screen, the shadow is smaller.
Слайд 10Day and Night
A day + a night = 24 hours
365 of
these makes 1 year.
The Earth takes 1 year to orbit the Sun.
(What does ‘orbit’ mean?)
The Earth takes 1 year to orbit the Sun.
(What does ‘orbit’ mean?)
Слайд 11The Earth is a ball (or sphere)
The Sun cannot shine on
both sides of the Earth at the same time
Some of the Earth is bright - day
Some is dark – night
The Earth spins so each part has day and night.
Some of the Earth is bright - day
Some is dark – night
The Earth spins so each part has day and night.
Слайд 14As the Earth spins
the position of the Sun varies.
Morning –
the sun rises - it is light.
The Sun gets higher in the sky.
Then the Sun sinks and sets.
The Sun gets higher in the sky.
Then the Sun sinks and sets.
Слайд 15Shadows move during the day
Watch the shadow of the stick
to tell
the time
like a sundial.
like a sundial.
stick
6.00 pm
12.00 noon
6.00 am
Слайд 16The Sun appears to move across the sky
as it moves shadows
move.
A stick in the ground has a shadow.
A sun dial uses this.
The solar pyramid is like a huge stick.
Its shadow moves to show the time.
A stick in the ground has a shadow.
A sun dial uses this.
The solar pyramid is like a huge stick.
Its shadow moves to show the time.
Слайд 18The seasons:
the Sun provides light and heat but -
winter is
cold
summer is warmer
What causes this?
summer is warmer
What causes this?
Слайд 19
Summer and winter
In winter the Sun stays low in the sky.
In
summer the Sun rises higher in the sky.
Winter
Summer
The horizon
Слайд 20Summer and winter
The earth is tipped as it spins
Light and heat
reach the Earth at different angles in summer and winter
In winter the light and heat from the Sun is more spread out than during the Summer.
It feels colder
We can try an experiment.
In winter the light and heat from the Sun is more spread out than during the Summer.
It feels colder
We can try an experiment.
Sun
Summer
Winter
Beam of light
Earth
Earth
Слайд 22The Moon
The Moon is not a source of light.
Light from the
Sun shines on the Moon. Some light is scattered so we see it on Earth.
The Moon takes about
28 days to move round the Earth.
It always shows Earth the same side.
The shape we see changes
during the 28 days- a lunar month.
The Moon takes about
28 days to move round the Earth.
It always shows Earth the same side.
The shape we see changes
during the 28 days- a lunar month.
Слайд 23The Moon travels round the Earth
Sunlight
Earth
no Moon is seen
new Moon
half MOON
or first quarter
full Moon
last quarter
Слайд 24Bad astronomy in films
What is wrong with –
the Moon looking the
same for 3 or 4 nights?
lots of stars visible at full Moon?
showing lots of stars out of the window of a brightly lit room?
the shadow line at Sun-rise looking sharp?
lots of stars visible at full Moon?
showing lots of stars out of the window of a brightly lit room?
the shadow line at Sun-rise looking sharp?
Слайд 25The Moon
The Moon is very much smaller than the Sun.
But the
Moon is very much closer than the Sun.
They both look the same size in the sky.
They both look the same size in the sky.
eye
Слайд 26Sometimes the Sun does not shine during the day.
Even when it
is not cloudy!
Let us play a game.
Shut one eye
Hold the Moon card so that you cannot see the Sun.
Let us play a game.
Shut one eye
Hold the Moon card so that you cannot see the Sun.
NASA
Слайд 28An eclipse of the Sun
When the Moon stops the light from
the Sun reaching the Earth
We call it an eclipse.
During an eclipse, it goes dark in the middle of the day.
An eclipse of the Sun is rare and happens at a new Moon.
We call it an eclipse.
During an eclipse, it goes dark in the middle of the day.
An eclipse of the Sun is rare and happens at a new Moon.
Слайд 30An Eclipse of the Moon
Full Moon: the Earth is between the
Moon and the Sun.
Light gets to the Moon because they are not in line.
The Earth sometimes blocks out the sunlight from reaching the Moon.
Then we cannot see the Moon (in position 3).
This is an eclipse of the Moon.
Light gets to the Moon because they are not in line.
The Earth sometimes blocks out the sunlight from reaching the Moon.
Then we cannot see the Moon (in position 3).
This is an eclipse of the Moon.
sunlight
Earth’s shadow
1
2
3
4
Слайд 31What have we learned? (Sunlight takes 8 minutes
to reach the Earth.)
Shadows form when light is blocked out.
Night is when no sunlight reaches us.
We can tell the time by shadows.
In winter the Sun is low in the sky.
The moon reflects light to the Earth.
Its shape changes because of shadows.
Eclipses happen when light is blocked out.
- all shadows!
Слайд 32Space exploration
Solar transit
of the International Space Station and Space Shuttle Atlantis
(50 minutes after undocking from the ISS, before return to Earth)
Слайд 34The girl who named Pluto
In 1930, Pluto was discovered.
Venetia Burney,
aged 11, named it Pluto.
She was born in 1919 and, is the only person in the World who named a planet- although it is not classified as a planet now.
On 17 January 2006, NASA launched New Horizons, the first space mission to Pluto.
It will reach Pluto in July 2015
She was born in 1919 and, is the only person in the World who named a planet- although it is not classified as a planet now.
On 17 January 2006, NASA launched New Horizons, the first space mission to Pluto.
It will reach Pluto in July 2015
NASA
Слайд 35New Horizons at Pluto (simulation)
It travels past Jupiter at a speed
of
21 km each second
21 km each second
NASA
