Chapter 20 Test
What evidence do you have that the Earth rotates?
The purpose of constellations is to
divide the sky into units
How did Galileo discover that the sun rotates?
He tracked the movement of sunspots.
What does rotation give us?
night and day
The model that Copernicus constructed showed planets traveling in which orbital shape?
The apparent shift in the position of a star caused by Earth's motion is called
An eclipse can occur during a
new moon phase
The same side of the moon always faces Earth because
the moon turns at the same speed as it orbits
The spinning of a body on its axis is called
Whcih body is at the center of a heliocentric universe?
Waxing refers to.
a gradual change from all dark to all light
A(n)__________ eclipse occurs when the Moon casts its shadow on Earth
Galileo observed several features using the telescope. Which of the following did he NOT discover?
moons of Mars
How much time does it take the Moon to go around the Earth once?
27 1/3 days
If the visible Moon is said to be declining, the moon phase cycle is progressing from_________
third-quarter to new moon
In each orbit of its revolution around the Earth, the moon does not come directly between the sun and the Earth to produce an eclipse because
the moon's orbit tilts
Why are eclipses so rare?
The plane of the moon's orbit is inclined by about 5 degrees
One of the discoveries that led to the modern view of the solar system was that the orbits of the planets are ______________.
What would be the eccentricity value of a perfect circle?
In the ptolemaic (Greek) model of the universe __________
Earth was in the center of the universe
Due to Aristitle's strong influence, most ancient Greeks viewed the universe
Why did Tycho Brahe not believe in the Copernican model?
He was unable to observe stellar parallax.
How did Galileo's finding the four moons of Jupiter support Copernican theory?
Dispelled idea that Earth was the only center of motion in the universe
Over the course on the year, in which direction do constellations appear to rotate in the Southern hemisphere?
The apparent westward drift of the planets as compared to the background stars is called ___________.
Chapter 20 Test
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