1. Space

2. 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?

3. 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 _____.

4. 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.

5. 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 ______________.

6. A collection of eight planets and their moons in orbit around the sun.
The Solar System
A collection of eight planets and their moons in orbit around the sun.

7. 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.

8. 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

9. Objects in the Solar system
Dwarf planets:
Spherical
Orbits the Sun
Mass is not much larger than the mass of other objects nearby

10. Objects in the Solar system
Asteroids
Small, rocky objects in the Asteroid Belt between Mars and Jupiter.

11. Objects in the Solar system
Comets
Icy object which heats up when passing close to the Sun.

12. Distances Astronomical Unit:
The average distance from the Earth to the Sun (~150 million km) = 1 AU.
Planet
Average Distance to Sun (km)
Average Distance to Sun (AU)
Mercury
57,910,000
0.39
Venus
108,210,000
0.72
Earth
149,600,000
1.00
Mars
227,920,000
1.52
Jupiter
778,570,000
5.20
Saturn
1,433,530,000
9.58
Uranus
2,872,460,000
19.20
Neptune
4,495,060,000
30.05

13. Inner planets Also called Terrestrial planets:
Four planets closest to the Sun
Made of rock, metal.
Have solid outer layers
Mercury, Venus, Earth, Mars

14. Mercury Venus Earth Mars
Planet
Mass
(kg)
Diameter
(km)
Period of rotation
Period of revolution
Atmosphere
Structure Diagram
Mercury
Venus
Earth
5.97 x 1024
Mars

15. 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.

16. 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.