ES Chapter 25 Review

When should humans be sent to explore space instead of drones?

• when the benefits gained justify the risks to the explorers

• we should always use humans because machines are unreliable

• we should never use humans because machines are more reliable

What was unique about NASA's Space Transportation System for the time?

• the shuttles were reusable

• the shuttles were human operated

• the shuttles used multi-person crews

• the shuttles were capable of maintaining orbit around earth

Why did the construction of the International Space Station involve many countries?

• due to the great cost as well as to promote international cooperation

• the UN decreed that all space stations be international

• because the US and the USSR signed a treaty under which the ISS was outlined

An orbiting spacecraft must do what with it's energy in order to safely return to earth

• it must get rid of its kinetic and potential energies in order to fall back to earth

• It must increase its kinetic and potential energies in order to escape orbit

Spirit and Opportunity are both examples of remotely controlled robotic space vehicles called

• rovers

• probes

• satellites

• landers

Some satellites, like for satellite TV, stay in the same place above the earth all the time. This kind of orbit is called

• geostationary or geosynchronous orbit

• gravity assisted orbit

• Low Earth Orbit (LEO)

• linked orbit

A smaller object in orbit around a larger one is called a _____, which can be natural or artificial

• satellite

• probe

• rocket

• telescope

Rocket propulsion is based off of whose 3rd law of motion known as the action-reaction principle?

• Isaac Newton

• Wernher Von Braun

• Plato

• Albert Einstein

What part of a refracting telescope gathers the light?

• the objective lens

• the tube

• the focuser

• the eyepiece

What part of a refracting telescope magnifies the image?

• the objective lens

• the tube

• the focuser

• the eyepiece