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19 Cards in this Set

  • Front
  • Back
axis
a straight line around which an object turns
atmosphere
the air space above Earth or another planet
mass
a measure of the amount of matter in an object
rusted iron
a metal that is covered with a reddish-brown material
unbearable
describes a condition that is painful and difficult to live with
grammar
rules that govern the correct use of language
an excerpt
a portion or section of a text that has been removed from a larger or longer text
particles
small pieces of something
energy
the power to do work
carbon dioxide
a gas with no color, has no odor
water vapor
water that has changed from liquid to gas and usually cannot be seen
reddish
somewhat red
a mission
a group of a people sent somewhere for a purpose
a sample
a single thing that shows one example of things in a larger group
an astronaut
a person who travels in a spacecraft
a space probe
a man-made machine that goes into outer space without a crew of humans
gravity
a natural force that pulls objects to the ground
a spacecraft
a vehicle that is used to travel beyond earth's atmosphere
Neil Armstrong
the first human being to step foot on Earth's moon