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54 Cards in this Set
- Front
- Back
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atmosphere
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The mixture of gases that surround a planet.
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Oxygen
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A colorless gas found in the air.
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gravity
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The force that pulls things down toward the surface of the Earth and keeps them from floating away.
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horizon
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The line where the sky, Earth, or sea seem to meet.
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axis
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An imaginary line that goes through the North Pole and the South Pole of Earth.
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South Pole
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The most southern point on Earth, at the bottom.
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North Pole
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The most northern point on Earth, at the top.
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revolution
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The movement of 1 object around another object.
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orbit
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The path an object takes as it moves around another object in space.
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craters
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Holes on the moon or a planet made by a space rock hitting it.
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surface
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The outside part of something.
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astronaut
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A person who is specially trained to travel into space.
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reflection
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The bouncing of light off an object.
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space craft
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A machine that flies in space.
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How long does it take for the moon to make 1 revolution around Earth?
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27 days and 8 hours
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What are the phases of the moon?
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New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Last Quarter, Waning Crescent
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star
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an object in space that produces its own heat and light
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telescope
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a tool for observing objects at a distance
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solar system
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the sun and all objects that move around it
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Venus
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2nd planet from the sun; brightest planet
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Earth
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3rd planet from the sun; 1 moon
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solar Flare
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an eruption on the surface of the sun
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What is the order of the sun, moon, and earth for a full moon?
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sun, earth, moon
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What is the order of the sun, earth, and moon for a new moon?
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sun, moon, earth
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List the order in which the phases of the moon occur?
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new moon, waxing crescent, 1st quarter, waxing gibbous, full moon, waning gibbous, last quarter, waning crescent
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Is the moon older or younger than the earth?
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slightly younger
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What two factors cause the phases of the moon?
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The light from the sun that reflects off the moon, and the position of the earth, moon, and sun.
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What causes day and night on earth?
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The rotation of the earth on its axis
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What is a blue moon?
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The 2nd full moon in the same month
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One moon phase cycle is how many days?
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29.5 days
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How long does it take the earth to spin on its axis?
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23 hours and 56 minutes
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How much of the moon is always illuminated by the sun?
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1/2 of it
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How long does it take the earth to go all the way around the sun?
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365.25 days
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Describe the shape of the earth
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Spherical not perfect, wider at the equator
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Mercury
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planet nearest to the sun; smallest planet
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rotation
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the spinning of a planet or a moon on its axis
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satellite
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an object either natural or man made that orbits a planet
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What are 2 causes of the seasons?
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Tilt of the earth on its axis (23.5 ) Earth orbiting around the sun
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Uranus
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7th planet from the sun; has 15 moons
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Neptune
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8th planet from the sun; has 2 moons
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Jupiter
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5th planet from the sun; has 14+ moons; largest planet
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Saturn
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6th planet from the sun; has 21 moons; second largest planet
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revolution
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one complete trip of a planet around the sun
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comet
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a mountain sized chunk of ice and dust that orbits the sun
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eclipse
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an object in space casts its shadow on another oblect
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asteroid
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a large space rock that orbits the sun
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planets (names)
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Mercurt, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
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Lunar Eclipse
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the earth casts a shadow on the moon
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Lunar Phases
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the different shapes or phases of the moon in one month
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shooting star
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meteor; bright trail or streak
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Satellite (2)
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an object launched to orbit earth or other heavnly body
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Revolution
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turning around or rotating; the motion of one heavnly body around another
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Mars
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4th planet from the sun; has 2 moons
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Moon
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a natural object that orbits a planet
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