To which star does the earth's north pole always point?
The earth's north pole always points to Polaris - The North Star.
100
What do the root words of GEO CENTRIC mean?
GEO = Earth CENTRIC = center
100
The moon has _____ phases.
The moon has 8 phases.
100
This causes tides on earth.
What is the moon's gravitational pull.
100
What is a day?
A day is the complete rotation of the earth on its axis. We count it from midnight to midnight.
200
These constellations are always visible in the Northern Hemisphere.
What are the Circumpolar constellations?
200
Explain the geocentric model of the universe.
The geocentric model proposed that
All the heavenly bodies revolved around the earth
in perfect
crystal spheres.
200
When the moon is at 90 degrees to the earth and sun, we see a ______________ _________ .
When the moon is at 90 degrees to the earth and sun, we see a QUARTER MOON.
200
There are ---- high and ----- low tides everyday.
There are 2 high and 2 low tides everyday.
200
What two facts cause seasons on the earth?
1. The earth's revolution around the sun.
2. The 23 degree tilt of the earth.
300
These constellations are on the ecliptic and so only visible at certain times of the year.
What are the zodiac Constellations? What is the Zodiac?
300
Explain Copernicus' heliocentric model of the universe.
Copernicus' heliocentric model of the universe said that all the heavenly bodies revolved around the sun in perfect circles.
300
Why does the moon look like it has phases?
The moon looks like it has phases because as the moon revolves around the earth, we see only the part that the sun shines on (illuminates)... These change as the relationship of the moon to the earth and sun change.
300
True or False - Spring tides occur during a full moon only.
False- Spring tides occur during the new moon and full moons.
300
Draw the sun, moon and earth's relationship on the longest day of the year.
BONUS EARN 300 more points for answering:
The longest day of the year occurs around _______and is called the ______ ______ .
Drawing must show tilt of earth toward the sun.
BONUS EARN 300 more points for answering:
The longest day of the year occurs around June 22 and is called the Summer solstice .
400
Name two circumpolar constellations.
Any two of:
Ursa Major, Ursa Minor, The Big Dipper, The Small Dipper, Cepheus, Cassieopia, Perseus, Draco
400
Why did earlier astronomers think the geocentric model was not right? What gave them reason to believe this?
Their observations made it clear that the universe did not move in perfect circles. They saw planets that seemed to go backwards, etc. So they needed a different model to explain what they saw in the sky.
400
What phases of the moon occur when the sun, moon and earth are mostly in a straight line? Create a drawing to explain your answers.
FULL MOON sun earth moon
NEW MOON sun moon earth
400
How do Spring tides affect the tidal range- the distance between high and low tides?
Spring tides INCREASE the tidal range... .they make the highest high tides and lowest low tides.
400
When do equinoxes occur?
Equinoxes occur in March and September.
500
Name four Zodiac constellations.
Any four of:
Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn , Aquarius and Pisces.
500
He ended his life on house arrest for believing that not the earth but the sun was at the center of the universe.
Who is GALILEO?
500
During what phase of the moon can we have solar eclipse? Why?
We can only have a solar eclipse during a new moon because the moon has to be in the precise position between the earth and sun to completely block out the sun. It is only between the earth and sun during a new moon.
500
Draw the relationship of the sun, moon and earth at NEAP TIDES.
The sun earth and moon must be at 90 degrees.
500
Explain what is meant by "The Land of the Midnight Sun".
Due to the tilt of the earth, during the summer months the sun does not set at the poles. The sun is always shining- so this means that the sun is shining at midnight, too.