Transcript Rockets and Satellites - Laconia School District

Rockets and Satellites
A Power Point Presentation About
Rockets and Satellites
By:
Rebecca Bacon
Rockets
A rocket moves forward when gases
expelled from the rear of the rocket
push it in the opposite direction. Hot
gases are propelled out of the back
of a rocket engine. The force of the
gas in one direction (action)
produces an opposing force
(reaction) that propels the rocket
forward.
Space Shuttles
• The Saturn V rockets that carried astronauts to the moon in the 1960’s
and 1970’s were very expensive. In addition, they could not be reused
because each stage burned up and fell back through earth’s
atmosphere. In the late 1970’s, the National Aeronautics and Space
Administration (NASA) developed the reusable space shuttles. They
are called shuttles because they can go back and forth, or shuttle,
between the earth and space. Since the first shuttle was launched in
1981, space shuttles have been the main way that the United States
launches astronauts and equipment into space. NASA is studying
several ideas for building better and less expensive ways of launching
people and cargo into space. The ideal vehicle would be an aerospace
plane that could take off from a runway, travel into space, and landing
again on the runway.
Space Stations
• A space station is a large satellite in which people
can live for long periods. The first space station, the
Soviet Union’s ‘Salyut’, was launched in 1971. In
1973, the United States launched Skylab, which
carried a series of telescopes and medical,
geological, and astronomical experiments.
Satellites
Satellites are used for communications,
navigation, collecting weather data, and
research, In addition, two-dozen Global
Positioning Satellites give off signals that can
be picked up by small receivers on earth. The
receiver can then tell you where you are on
earth’s surface.
The Rocket Stages
1. Heavy first stage provides thrust for launch.
2. First stage separates and falls to earth.
3. Second stage ignites and continues with third
stage.
4. Second stage separates and falls to earth.
5. Third Stage ignites.
6. Third stage is discarded.
7. Lunar vehicle proceeds to lunar orbit.
The Different Satellites
•
Artificial Satellites- Artificial Satellites are used to relay telephone
calls, to measure the earth’s atmosphere, and photograph weather
systems, crops, troops, and ships.
•
Global Positioning Satellites- Global Positioning Satellites give off
small signals that can be picked up by small receivers on earth.
The receiver can then tell you where you are on the earth’s
surface.
•
Geosynchronous Satellites- Geosynchronous Satellites are used
to relay television signals and to map weather patterns.
Questions From Sheet
•
What is a geosynchronous orbit?
The Orbit of a satellite that revolves around earth at the same rate the earth rotates.
How Do Rockets move in Space?
A Rocket moves forward when gases are expelled from the rear of the rocket, pushing it in
the opposite direction. Hot gases are propelled out of the back of a rocket engine. The force
of the gas in one direction (action) produces an opposing force (reaction) that propels the
rocket forward.
What is one way that Saturn V rockets and space shuttles are different?
Saturn V’s are more expensive and there stages are not re-usable, do to the stages burning up
in the atmosphere, space shuttles were found by NASA to be more cheaper and also for
some of there parts to be re-usable which saved them even more money on research to find
how to make the shuttles even more advanced.
Which stage of a multistage rocket reaches the final destination?
Multistage rockets have three stages, or sections. Each of the first two stages burns all of its
fuel and then drops off. The next stage then takes over. Only part of the third stage reaches
the rockets destination.
Reference
• Science Text Book
• Pictures Found Off Google