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61 Cards in this Set
- Front
- Back
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rotate
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to spin around
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rotate
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causes day and night
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rotation
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takes 24 hours
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axis
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imaginary line that Earth spins around
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revolve
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to move in a nearly circular path around something else
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revolution
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takes Earth one year
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orbit
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the path a revolving object moves along
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Earth's orbit around sun
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shaped like an ellipse
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satellite
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an object that moves in orbit around another
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satellite
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the moon is the only natural one for Earth
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craters
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hollow areas on the moon's surface
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craters
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caused by chunks of rocks crashing into the moon
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moon phases
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the different shapes the moon appears to take as it travels around the Earth
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astronomer
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a scientist who studies the planets
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telescope
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a tool used by astronomers to make objects appear larger
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star
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a hot glowing ball of gases that gives off energy
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star
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our sun is a medium-sized one
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planet
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a satellite of the sun
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planet
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8 of these revolve around our sun
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solar system
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the sun and all the other objects that orbit around it
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vacuum
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Space is a _____, void of any atoms.
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helio
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Greek word for sun.
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solar
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Latin word for sun
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east
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The sun rises in the ______.
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tele
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Means distant
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scope
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Means "instrument for viewing"
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aster
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The Greek word for star
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Milky Way
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The name of our galaxy
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geo
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Latin word for "Earth"
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uni
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Latin word for "one"
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equator
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Identify the red line.
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Milky Way Galaxy
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Identify the picture.
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Galileo
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He improved the telescope and discovered 4 moons revolving Jupiter.
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sphere
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Name the geometrical shape.
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ellipse
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Name the shape.
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axis
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Name the imaginary line running from North and South poles.
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tilt of the Earth's axis
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The main reason for the seasons on Earth is _______.
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Copernicus
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He developed the theory that the Sun,not Earth is the center of the solar system.
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astronomy
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The branch of science that studies the stars, planets, and other objects in space.
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universe
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Everything that is known to exist in space
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winter
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When we have summer in the Northern Hemisphere, the Southern Hemisphere is having _____.
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Earth
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People of early civilizations (140 A.D.) believed that _______ was the center of the universe.
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oid
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Means "to be like or similar to"
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spiral
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Shape of our galaxy
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moon
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Earth's natural satellite
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23.5
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The tilt of the earth is ____ degrees.
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30
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The moon is about ____ earth diameters away from Earth.
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109
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The Sun is _____ times wider in diameter than the Earth.
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asteroid
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A small, mostly rocky solar system object that orbits independently around the Sun;minor planet.
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gravity
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A force of attraction between two objects
The force between all planets and their moons An invisible force |
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planet
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A massive, usually spherical space object that orbits a star
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galaxy
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A large system of dust, gas, and other celestial bodies that has a particular shape
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lunar
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The Latin word for Moon
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eclipse
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The Earth's orbit is over 365 days.
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It is necessary to add a day to the calendar every 4 years because ______.
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4
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How may moon diameters would fit across the earth's diameter?
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The Moon is closer to Earth.
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Why does the Sun appear the same size as the Moon?
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diameter
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What does the blue line represent? (Hint) It's the distance through the center of an object.
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27.32
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It takes the Moon ____ days to orbit Earth.
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False
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True or False
The Moon does not rotate on its axis. |
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winter summer
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Earth is slightly closer to the sun in _____ than in _______.
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