Rockets

1
Rockets Satellites

• Chapter 1 Earth, Moon, Sun

2
Essential Questions

• How do rockets travel in space?
• What are satellites and space stations used for?

3
How Rockets Work
4
Newtons third law of motion (physics) states
that for

• every force, or action, there is an equal and
  opposite force, or reaction.

5
How does this law apply to the balloon in the
Discover Activity?

• The force of air going out the back of a balloon
  is an action force
• An equal force, the reaction, pushes the balloon
  forward

6
How do rockets travel in space?

• A rocket moves forward when gases expelled from
  the rear of the rocket push it in the opposite
  direction
• In a rocket, fuel is burned to make a hot gas
• This hot gas is forced out of narrow nozzles in
  the back of the rocket, propelling the rocket
  forward

7
Multistage Rockets
8
What were two disadvantages of the first rockets,
which led the development of the multistage
rocket?

• Gunpowder was used for fuel
• Burned to quickly
• Highly explosive
• A rocket could only carry so much fuel
• Once the fuel is burned up the rocket falls back
  to Earth

9
The Saturn V (five) rocket was developed in
1960s. How do these multistage rockets work?

• Once a stage uses up its fuel, the container
  drops off and the next stage ignites

10
Artificial Satellites
11
Satellite

• A natural of artificial object that revolves
  around an object in space
• Natural satellite
• Earths moon
• Artificial satellite
• Sputnik 1

12
Checkpoint What is a geosynchronous orbit?

• A geosynchronous orbit is one in which a
  satellite revolves around Earth at the same rate
  that Earth rotates on its axis.

13
What are satellites and space stations used for?

• Satellites and space stations are used for
  communications, navigation, collecting weather
  data, and research.

14
Space Shuttles
15
The reusable space shuttle was developed in the
late ______.

• 1970s

16
What does the acronym NASA stand for?

• National
• Aeronautics
• Space
• Administration

17
Figure 16 Inferring What is one advantage of
a reusable space vehicle

• Reusable vehicles are less expensive
• Fuel efficient
• Reusable equipment
• Safer landing techniques