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47 Cards in this Set
- Front
- Back
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Earth-(how does in compare in size to the other planets in the solar system?)
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Fifth (5th) largest planet in our solar system
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What is the only planet known to sustain life?
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Earth
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1)What does orbit mean?
2)How long does it take the Earth to orbit around the sun? |
1)path around the sun
2)one year |
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What does axis mean?
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an imaginary straight line that runs through the north and south poles
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Which direction does the Earth rotates on its axis from?
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west to east
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How long does it take to make a complete rotation?
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approximately every 24 hours. The rotation causes the opposite halves of the Earth's Surface to fall in and out of the sun's light in a regular pattern.
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What does days mean?
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The rotation causes the opposite halves of the Earth's Surface to fall in and out of the sun's light in a regular pattern.
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What does a year mean?
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one revolution. About 365 rotations or days are completed in the course of one revolution
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What is a satellite?
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small body orbiting a planet
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AS the Earth revolves in its orbit, or path around the sun, it also rotates on its axis, an imaginary straight line that runs throught the north and south poles.
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x
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What does satellite mean?
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small body orbiting a planet
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What is the Earth's only satellite?
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the Moon
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Does the moon have its own light?
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No
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Why can we see the moon?
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Only beause it reflects light from the sun.
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Does the moon change shapes?
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yes as it travels around the earth
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What are the moons 4 main positoins?
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1) New
2) First Quarter 3) Full 4) Last Quarter |
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What do we call the moon when it moves toward full?
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Waxing
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What do we call the moon when it moves toward New?
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Waning
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Is the moon's surface with relation to the physical features similar to the Earth's surface?
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Yes
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How is the moon's surface differnet from the Earth's?
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There is no atmosphere on the moon and therfore NO WATER.
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What is a mare in reference to the moon?
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Lunar Plains
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What is rilles mean in reference to the moon?
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Lunar valleys
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What does the Earth spin on
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it AXIS
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What is one spin of the Earth called?
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rotation
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What is it called when the Earth makes a trip around the sun?
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revolution
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How long does it take to make a revolution?
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one year
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What is an orbit?
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the path of the earth around the sun
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Is the Earth's axis perpendicular to the Earth's orbital plane?
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NO, it tilts about 23 degrees
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What causes the seasons?
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They are caused by Earth's tilt on its axis and Earth's revolution around the sun.
The seasons change because different parts of the Earth get different amounts of sunlight during the year. |
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What is the season when the northern half of the Earth tilts toward the sun?
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It is summer in the northern hemisphere and winter in the southern hemisphere
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What is the season when Earth moves so its northern half tilts away from the sun?
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We have winter in the northern hemisphere and summer in the southern hemisphere.
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Why do the seasons continue to change
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Because the tilt of the Earth's axis never chnages while the Earth circles around the sun.
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Who nare the planets in our solar system except Earth all named for?
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Ancient Roman gods
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What is the current order of the planets?
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1)Mercury
2)Venus 3)Earth 4)Mars 5)Jupiter 6)Saturn 7)Uranus 8)Neptune |
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What are telescopes?
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they are used to look at the moon and the planets. We don't know when for sure they were invented
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Who was the 1st person that saw the surface of the moon?
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Galileo
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What did Galileo discover about Jupiter?
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it had moons also
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What does the Hubble
Space Telescope do? |
NASA launched it in 1990 to orbit the Earth and take pictures of the solar system
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What are tides?
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rises and falls of large bodies of water
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Does the moon cause the tides?
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yes, the moon's gravity pulls the earth and that causes the tides
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1. How many high tides do we have?
2. How many low tides do we have? |
1)2
2)2 |
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When do low tides happen?
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They happen midpoint between the two high tides
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Does the sun play a part of the tides too?
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yes
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What happens to the tides when it is a New Moon?
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In the new moon, the sun and moon are on the same side of the Earth causing the highest high tides
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What happens to the tides when it is a Full Moon?
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when the moon is full, theere are also higher than average tides.
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What are spring tides?
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When the sun and the moon work in a team to cause higher than average tides
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What are neap tides?
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When the moon is in the First or Last quarter the sun and moon work to negate the effect on the tides and the tides are lower than average.
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