Grade 1

space - the area beyond Earth’s sky.
rocket - a manmade craft capable of leaving Earth
hero - a person who does something extraordinary for others
courage - doing what needs to be done even if you are afraid
planet - a ball of rock and gas that circles around a star
moon - A small ball of rock or gas that revolves around a planet
Sun - The star at the center of our solar system
star - a huge ball of burning gas

Grade 2

astronaut - someone who travels into space
pilot - someone who flies an airplane or spacecraft
solar system - the area where a group of planets go around a sun.
hemisphere - half of a planet or moon
temperature - how warm it is, measured in degrees Fahrenheit and degrees Celcius
oxygen - a gas that is needed for humans and animals to breathe

Grade 3

astronomy - the study of outer space
constellation - a group of stars that make a shape and usually has a story about that shape.
energy - the ability to do work
gravity - a force that causes an object to pull toward another object
orbit - circling around something else
pressure - what is created when something pushes down on something else
National Aeronautics and Space Administration (NASA) - The United States government agency that directs all public exploration and travel in space

Grade 4

cooperation - working together with someone else
experiment - test or procedure used by scientists to learn something new
transportation - what is used to get from one place to another
communication - passing ideas from one person to another, either through speaking, writing, dance, art, etc.
atmosphere - The gases that are held close to the surface of a planet by the force of gravity
Cold War - The state of political hostility that existed between the United States and the Soviet Union and their allies
Space Race - The race between the United States and the Soviet Union to be the first nation to reach Earth’s Moon

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