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47 Cards in this Set

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