Transcript Space - SSI General Science

SPACE
INTRO QUIZ
• 1. How many planets are there in the solar
system?
• 2. When was the first human sent into space?
• 3. When was the International Space Station
completed?
• 4. What is the biggest planet in the solar system
called?
• 5. What is the name of the galaxy that the solar
system is a part of?
QUIZ 1
• 1. How many planets are there in the solar system?
• 2. What is the main difference between a planet
and a dwarf planet?
• 3. Name two dwarf planets.
• 4. The inner planets are also called the
t _ _ _ _ _ _ _ _ _ _ planets.
• 5. The inner planets are made of metal and _____.
QUIZ 2
• 1. How many planets are there in the solar system?
• 2. What is the main difference between the inner
and the outer planets of the solar system?
• 3. Name the two largest gas giants.
• 4. The inner planets are also called the
t _ _ _ _ _ _ _ _ _ _ planets.
• 5. True/False: A comet is a rocky object found
between Mars and Jupiter in the solar system.
QUIZ 3
• 1. What are the outer planets also known as?
• 2. What is the common structure of the outer
planets?
• 3. Why do the outer planets have so many moons?
• 4. What is the hottest planet in the solar system?
• 5. The millions of rocky objects between Mars and
Jupiter are called ______________.
THE SOLAR SYSTEM
• A collection of eight planets and their
moons in orbit around the sun.
OBJECTS IN THE SOLAR SYSTEM
• Sun:
• Largest object in the solar
system.
• Gravitational forces cause
planets and other objects to
move around, or orbit, the Sun.
OBJECTS IN THE SOLAR SYSTEM
• Planets:
• Spherical
• Orbits the Sun
• Mass is much larger than the
mass of other objects nearby
• Eight planets in the Solar
System
OBJECTS IN THE SOLAR SYSTEM
• Dwarf planets:
• Spherical
• Orbits the Sun
• Mass is not much larger than the
mass of other objects nearby
OBJECTS IN THE SOLAR SYSTEM
• Asteroids
• Small, rocky objects in the
Asteroid Belt between Mars and
Jupiter.
http://www.freeasteroids.org/
OBJECTS IN THE SOLAR SYSTEM
• Comets
• Icy object which heats up when
passing close to the Sun.
DISTANCES
• Astronomical Unit:
• The average distance from the Earth to the Sun
(~150 million km) = 1 AU.
Planet
Mercury
Venus
Earth
Mars
Jupiter
Saturn
Uranus
Neptune
Average Distance to Sun (km) Average Distance to Sun (AU)
57,910,000
108,210,000
149,600,000
227,920,000
778,570,000
1,433,530,000
2,872,460,000
4,495,060,000
0.39
0.72
1.00
1.52
5.20
9.58
19.20
30.05
INNER PLANETS
• Also called Terrestrial planets:
• Four planets closest to the Sun
• Made of rock, metal.
• Have solid outer layers
• Mercury, Venus, Earth, Mars
Planet
Mass
(kg)
Mercury
Venus
Earth
Mars
5.97 x
1024
Diameter Period
(km)
of
rotation
Period of
revolution
Atmosphere
Structure
Diagram
OUTER PLANETS
• Jupiter, Saturn, Uranus, Neptune
• Also called the gas giants because they are
made of hydrogen and helium, which are
usually gases on Earth.
• Strong gravitational forces (large mass)
• Thick gas and liquid layer covering a small,
solid core.
ELECTROMAGNETIC SPECTRUM
• When we see the light of stars, we are seeing the
radiation coming from them.
• This is called electromagnetic radiation.
• There are lots of types of electromagnetic radiation.