1. Unit D – Space Exploration
Lesson 4-4:(sec 2.1)
Getting There: Technologies for Space Transport

2. A. History ancient made using rocket-propelled objects Greeks steam
in order to put an object into space, the
pull of Earth’s gravity must be overcome
Earth’s escape velocity is at least
km/h
1957 –
Russia launches Sputnik, the first artificial satellite
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3. B. Rocket Science rockets are propelled using forces
for every there is an
equal and opposite reaction
action
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4. rockets have three basic parts:1.
rocket body, fins, engines etc
structure and mechanical parts – 2.
liquid oxygen and hydrogen, gasoline (makes up most of the mass)
fuel – 3.
payload –
crew cabin, crew, air, water etc.
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5. C. Future Technology are engines that use ion drives
electrically charged xenon gas
xenon is
accelerated and emitted as exhaust, causing the rocket to move in the opposite direction
than but lasts an
weaker thrust
chemical fuel
extremely long time
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6. there is so the vehicle can no friction in space
go a long distance on very little fuel
are
solar sails
thin sheets that will move when exposed to solar energy
the energy from
photons from the sun is used to power the spacecraft and increase its speed
is being used as a sail material
carbon fibre
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7. D. Shuttles, Probes and Stations
transport to orbiting spacecraft
personnel and equipment
shuttles
contain
instruments for exploring space robotically
probes
eg) Voyager space probe, Hubble Space Telescope
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8. are orbiting spacecraft that space stations
allow people to live and work in space for extended periods of time
International Space Station
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9. Assignment
Worksheet 5