Our Planet Earth and The Solar System. Stars The Sun is the biggest and closest star to Earth. The Sun is very important because it gives us light and.
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Our Planet Earth
and The Solar System
StarsThe Sun is the biggest and closest star to Earth. The Sun is very important because it gives us light and heat.
A group of stars is called
a Galaxy. Our galaxy is
called the Milky Way.
PlanetsAll planets orbit a star because they need light. They spin around an axis and orbit around a star.
The planet we live
on is called Earth. It
spins on its axis in 24
hours and orbits our
star the Sun in 1 year.
Satellites orbit a planet. Our satellite is called the Moon.
Comets are made of
ice and rocks.
Asteroids are giant rocks.When they fall to Earth theyare called meteorites.
The Solar SystemHow many planets orbit the sun?
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
The Sun
http://www.youtube.com/watch?v=wjQJMeq7_Pk&feature=related
Hot and ColdWhich are the hottest/inner planets?
- Mercury, Venus, Earth and Mars
Why?
- Because they are close to the Sun.
Which are the coldest/outer planets?
- Jupiter, Saturn, Uranus and Neptune
Why?
- Because they are far away from the Sun.
Earth’s OrbitLike all planets, Earth orbits the
Sun.It takes 1 year to orbit the Sun.
1 year = 365 daysThis movement causes the FOUR SEASONS
What are the four seasons?
Spring, Summer, Autumn and Winter.
How long does it take for Earth to orbit the Sun? It takes one year. One year is 365 days.
The Four Seasons
Earth’s SpinningWe know the Earth orbits the Sun once a year.
But, the Earth also spins on its own invisible axis.
The Earth takes one day to spin around.1 day = 24 hours
When the Earth spins, half is in the Sun’s light (day) and half is in the Sun’s dark shadow
(night).
How long does it take for Earth to spin on its axis?
It takes one day. One day is 24 hours.
Day and Night
Day
Night
http://www.youtube.com/watch?v=taHTA7S_JGk&feature=related
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