Download Unit 2. The planets in the Solar System

Unit 2. The planets in the
Solar System
The Solar System
• The Solar System consists of a central
star, the Sun, and several other bodies
bound by gravity that move around the
Sun
• the
bodies include planets, dwarf
planets, satellites and another small
bodies
In our Solar System there are:
Eight planets: Mercury, Venus, Earth, Mars,
Jupiter, Saturn, Uranus and Neptune
Five dwarf planets: Ceres, between Mars and
Jupiter, and the ones called the Plutoids (Pluto,
Haumea, Makemake and Eris), located beyond
Neptune
• Among the planets, we can distinguish
between
planets:
the
inner
and
the
outer
• The
inner planets, are also called
terrestrial planets, are the nearest
planets to the Sun. They have a rock
composition. They are Mercury, Venus,
the Earth and Mars
• The
outer planets are the farthest
planets from the Sun. They consist
mainly of gas. They are Jupiter, Saturn,
Uranus and Neptune
https://www.youtube.com/watch?v=7e5-0t0pTF0
2-THE EARTH, STRUCTURE AND GEOGRAPHIC
COORDENATES
1º ERC/UNIT 2. THE
PLANETS IN THE
SOLAR SYSTEM/Sol
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About our planet
•The Earth is a rocky , almost spherical planet.
•Its radius is 6.373 Km.
•The Earth is formed by four spheres:
• The Atmosphere surrounds the Earth. It is
the
outer sphere and lightest sphere of all, It is formed
by a mixture of gases, called air.
•The Hydrosphere means all the water on the
Earth: oceans, seas, lakes, rivers, subterranean
water, etc. Water covers three quarters of our
planet.
•The geosphere is the solid sphere, although in
some parts it can be viscous due to its high
temperature. It is formed by mineral rocks and
metals. It has three layers: the crust, the mantle,
and the core.
3. The Earth’s
movements
• The earth makes two types of regular
movement: Rotation and Revolution.
• Rotation, occurs when the Earth
spins
on its axis every 24 hours.
• Revolution: the Earth makes a full orbit
or revolution around the Sun in 365
days, 6 hours and 9 minutes.
•A
sidereal year is the time the Earth
takes to orbit around the Sun
• https://www.youtube.com/watch?v=l64Y
wNl1wr0
• https://www.youtube.com/watch?v=vioZ
f4TjoUI&index=3&list=PLFC4EE4355A
DEBDB1
4. The Moon
• The Moon travels around the Earth
once every 29,8 days.
• The Moon has no atmosphere
• There are maria (basaltic seas) and
craters on the surface of the Moon
• The Moon has four phases: New Moon,
Full Moon, Waxing Crescent and
Waning Crescent
• https://www.youtube.com/watch?v=NC
weccNOaqo
Effects of the Moon
on the Earth:
• Eclipses happen when the Earth, the
Moon and the Sun are in a straight line.
• Tides are an effect of the gravitational
attraction of the Moon and the Sun on
the Earth
THE END