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Space Unit Review

Study stack for Space Unit Test

Terrestrial Planets Mercury Venus Earth Mars; a small, dense, rocky inner planet.
Gas Giants Jupiter Saturn Uranus Neptune; a large, gaseous outer planet of the outer solar system with no known solid surface
Magnetic field protects worlds from solar wind
Barometer measures atmospheric pressure
Magnetometer measures strength of magnetic field
Thermometer measures temperature of world
Temperature scales Fahrenheit, Celsius, Kelvin
Seismograph measures presence of seismic activity (volcanoes/earthquakes)
Spectrograph obtains information about the world's composition
RADAR maps the surface of a world (elevation levels)
Infrared Camera measures heat regions on a world
Probe types flyby, orbiter, orbiter with lander
Spectra "signature" of an element's presence
Supernovae A star that has run out of fuel and collapses on itself, which creates a big explosion
Craters formed when a meteorite or asteroid slams into the surface of a world
Gravity the force of attraction between two objects that is due to their mass and distance.
Moons of Jupiter Io, Europa, Ganymede, Calisto
rotation the spin of an object in space also known as one “day”.
revolution the motion of a body as it travels around another more massive body in space also known as one “year”.
orbit the PATH an object takes in space while revolving around another object.
atmosphere mixture of gases that surrounds a planet; protects the world from meteoroids and asteroids.
Sun a medium sized star; the center of our solar system.
Planet body that orbits around the sun or a star and does not produce its own light.
natural satellite a smaller natural body that orbits around a larger body.
moon a natural satellite of a planet. (Note: satellites are natural or artificial bodies that revolve around more massive bodies such as planets)
artificial satellite any human made object placed in orbit around a body in space.
comet a small body of ice, rock, and cosmic dust loosely packed together.
asteroid a small, rocky body that revolves around the Sun.
Meteoroid a very small, rocky body found in space. HINT: mini asteroid
Meteorite a meteoroid that reaches Earth’s surface without burning up completely.
Meteor a bright streak of light caused when a meteoroid or comet dust burns up in the atmosphere.
Thrust the force that accelerates a rocket.
Orbital velocity the speed and direction a rocket must have in order to orbit Earth.
Escape velocity the speed and direction a rocket must have in order to completely break away from a planet’s gravitational pull.
Centripetal force the force that causes an object to follow a curved path.
Created by: mrs_bauer