Can you name the Chapter 2 Exploring Space Key Terms? by missseid

Definition	Term
a place that is empty of all matter
the reaction force that propels a rocket forward
besides Neil Armstrong, the other astronaut to first land on the moon
the condition of experiencing weightlessness in orbit
name of the American program to land astronauts on the moon
a spacecraft that can carry a crew into space, return to Earth, and then be reused for the same purpose
small robot that moves around on the surface
a large artifical satellite on which people can live and work for long periods
speed in a given direction
the first American to orbit Earth
the velocity a rocket must achieve to establish an orbit around Earth

Definition	Term
type of rocket that discards its parts as they use up fuel
a spacecraft that carries scientific instruments that can collect data, but has no human crew
country that launched the first satellite (Sputnik I) into orbit
an orbit in which a satellite orbits Earth at the same rate as Earth rotates and thus stays over the same place all the time
a device that expels gas in one direction to move in an opposite direction
the first human to fly into space
an item that has uses on Earth but was originally developed for use in space
the velocity a rocket must reach to fly beyond a planet's gravitational pull
the rivalry between the Soviet Union and the United States in the exploration of space
the first American in space
an object that revolves around another object in space

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