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37 Cards in this Set
- Front
- Back
An imaginary line where the land seems to meet the sky
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horizon
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An ________ is a real or imaginary line through the center of a spinning object.
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axis
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Earth ____________ like a giant top this is spinning in space.
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rotates
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Earth is shaped like a ________.
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sphere
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An object that moves around another object ___________.
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revolves
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The path Earth takes as it travels around the Sun.
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orbit
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Spring, summer, fall, and winter are ____________.
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seasons
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The ___________ is an imaginary line around the middle of Earth.
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equator
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The moon has many ________ based on its appearance/shape, including full, half, and gibbous.
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phases
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As we see more of the Moon's lit surface, we say the Moon is a __________ moon. Something that is getting bigger is _______.
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waxing
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As we see less of the Moon's lit surface, we say the Moon is ________. Something that is getting smaller is _________.
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waning
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The four-week cycle of changing phases of the moon is called the _________ cycle.
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lunar
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When Earth is between the Moon and the Sun a _________ occurs. When this happens Earth's shadow falls on the Moon.
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lunar eclipse
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In 1957 ______________ was the first spacecraft to travel into space.
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Sputnik
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In 1969, the spacecraft Apollo 11 landed on the moon. For the first time astronauts ________ on the moon.
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walked
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A large sphere in space that orbits a star is a __________.
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planet
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If counting Pluto there are ______ planets.
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nine
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The _________ is made of the Sun, the planets, and other objects that orbit around it.
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solar system
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A ______ is a hot glowing ball of gas.
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star
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_____________ are chunks of rock or metal.
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asteroids
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_________ are mostly ice mixed with bits of rocks and dust.
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comets
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_________ are small pieces of rock or metal that have broken off comets or asteroids.
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meteors
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The sun rises every morning in the ________.
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east
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The sun sets every night in the ____________.
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west
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At the nothern end of the Earth's axis is ___________
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The North Pole
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Mercury, Venus, Earth, and Mars are the ________ planets.
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inner
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Jupiter, Saturn, Uranus, and Neptune are the ________ planets.
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outer
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A ____________ is a tool that gathers light to make faraway objects appear larger, closer, and clearer.
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telescope
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A curved piece of glass is used to make a __________.
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lens
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A __________is a very large group of stars.
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galaxy
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In 1543 a scientist named __________ said that the Sun, not Earth, was at the center of the solar system.
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Copernicus
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In 1609 ____________ used his telescope to discover evidence that Earth orbits the sun.
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Galileo
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Our solar system is in a galaxy we call the _____________.
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Milky Way
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A large group of ____ can form a picture called a constellation.
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stars
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The Little Dipper and the Big Dipper are both examples of a __________________.
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constellation
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The first astronaut in 1969 to walk on the Moon was ________.
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Neil Armstrong
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Along with Neil Armstrong, ____________ also walked on the moon in 1969.
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Buzz Aldrin
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