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Terms in this set (69)
Name the planets in order
Mercury, Venus, Earth, Mars, Asteroid Belt, Jupiter, Saturn, Uranus, Neptune, Pluto
A shape like a flattened circle is an ___________
The phase that shows half the moon's lighted face while it is waning is the ___________ ______________
The turning of a planet on its axis is _____________
A planet and the moons that revolve about it form a ______________ ______________
The crescent moon is an example of one of the __________ of the moon.
The division of the year that has a certain type of weather is a ____________
A unit of measurement that equals the average distance between Earth and the sun is an ____________________ __________
The phase that shows half the moon's lighted face while it is waxing is the _____________ _____________
A ball of ice, rock, and frozen gases that orbits the sun is a ___________
An imaginary line that runs through the middle of a planet from pole to pole is an __________
The path an object in space follows as it revolves around another object is an __________
A chunk of rock and metal that is smaller than a planet and that orbits the sun is an _______________
The movement of one object in orbit around another object is __________________
A particle of rock that is smaller than an asteroid and that orbits the sun is a ________________
The angle that a planet's axis is tilted from vertical is its _________ _________
The solar system's asteroid belt is between
mars and jupiter
The sun is located ____ of the orbits of the planets
slightly away from the center
Rotation causes a planet to have
day and night
A planet completes one revolution in that planet's
Precession of Earth's axis causes
a change in the north pole star
The axial tilt of Earth causes its
If you could view the phases of Earth's moon from the sun, what would you see?
you would only see a full moon. there would be no phases
Would astronomical units be practical for measuring distances on Earth? Explain your answer.
Astronomical units would not be practical for measuring distances on Earth because one astronomical unit is bigger than anything on earth
How might seasons on Earth be affected if Earth's orbit were more elliptical? Explain your answer.
Earth would spend more time closer to the sun and more time farther away from the sun.
If Earth were closer to the sun in summer, summer would be hotter and winter would be colder. If it was closer to the sun in winter, winter would be mild and summer would be cooler.
on or about march 21, the ________ ____________ beings in the northern hemisphere
vernal equinox (spring)
on or about december 22, the earth has its __________ ___________
on or about September 23, the ________ ____________ beings in the northern hemisphere
autumnal equinox (fall)
the date with the most daylight in the northern hemisphere is on or about June 21, the ___________ _____________
what enabled galileo to see planets?
there are ________ planets and more than _________ moons in the solar system
9 planets, 60 moons
why is daytime on each planet different?
they have different rotations
why is it warmer in summer than in winter (that has to do with earth)?
earth is pointed more towards the sun
for thousands of years, the north star changed because of what?
the world wobbling on its axis
If earth had a no axial tilt, what would happen to the seasons?
there would be no seasons
a comets tail always points which way (in respect to the sun)?
away from the sun (check the book kids)
a light-year is a measurement of what?
people used to think _________ was in the center of the solar system
___________ ___________ said that earth was in the center of the solar system and planets had circular orbits, and outside the planets was a rotation sphere studded with stars
___________ ______________ came up with a correct model of the solar system, but the shape of the planets' orbits were wrong
_____________ ____________ discovered that Mars didn't have a circular orbit, but an elliptical one
besides planets and moons, the solar system contains __________, _______________, and _____________
asteroids, meteoroids, and comets
comets glow because. . .
when comets pass the sun, they may be heated and turn partly into gas. Energy from the sun causes the gas to glow.
What do all the planets in the solar system have in common?
They all revolve around the sun in an elliptical orbit
about how many known asteroids are located in the belt?
A planet's year depends on. . .
distance from the sun
the speed of a planet ________ when it is closer to the sun and ____________ when it is farther away from the sun
closer - increases
farther - decreases
what does not affect seasonal temperature changes on earth?
earth's distance from the sun
what keeps a planet in orbit?
inertia combined with gravitational force
earth makes one huge wobble every ___________ years
what is a long term effect of earth's wobble?
earth's axis at the North pole points at different stars in the sky
what are aphelion and perihelion?
aphelion - planet is farthest from the sun
perihelion - planet is closest to the sun
How would Earth's year be different if Earth were farther from the sun? Explain your answer
Earth's year would be longer. It would take longer for Earth to make a full revolution. It would cover a greater distance to complete one orbit around the sun
does the axis remain tilted in the same direction all year long?
which planets have virtually no axial tilts?
mercury and venus
which planets have extreme axial tilts?
pluto and uranus
Mars's seasons are affected by its _______ _______ and ____________ _______
axial tilt and elliptical orbit
Why is it warmest in the summer?
Earth's Northern hemisphere is pointed toward the sun, causing the Earth to absorb more energy, raising the temperature. The northern hemisphere also gets more direct sunlight and more hours of daylight.
Why do astronomers think that, besides Earth, other planets in the solar system also have seasons?
other planets have large axial tilts
How do seasons of the Northern Hemisphere relate to the seasons of the Southern Hemisphere on Earth?
The seasons in the Northern Hemisphere are always opposite of those in the Southern Hemisphere.
What are the waxing phases?
When between the new moon and full moon, the visible part of the lit side of the moon gets larger.
What are the waning phases?
When between the full moon and new moon, the visible part of the moon's sunlit side gets smaller.
Would it be possible to see phases of Earth from Mars? Explain your answer.
It would be possible to see the phases of Earth from Mars. Even though we can't see the phases of Mars from Earth, since Earth is closer to the sun, it would be easier to see its phases.
Does the moon produce light? How do you know?
It does not produce light. If it did, it would always appear to be a bright round disk
Could you see the phases of earth from the moon?
who was the first astronomer to see the phases of venus?
What are the phases of the moon in order? (starting w new moon)
New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Third Quarter, Waning Crescent
what is a new moon?
when the lit side of the moon is facing away from earth, and the moon is barely visible
why isn't there an eclipse every full or new moon?
Earth's orbit around the sun is not in the same plane as the Moon's orbit around the Earth
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