1The Greeks knew the Earth was round by observing what?
- The Sun was round so, why not the Earth?
- The shadow on the sun dials.
- The seasons of the years.
- The shadow of the Earth on the Moon during a lunar eclipse.
2Who was it who calculated the distance from the Earth to the Sun and reasoned the Sun must be larger than the Earth or Moon? Then proceeded to propose the Sun centered Solar System.
- Hipparchus
- Eratosthenes
- Aristarchus
- Copernicus
3Who discovered the precession of the Earth by comparing his detailed star charts to those of the Babylonians 150 years earlier?
- Aristachus
- Hipparchus
- Galileo
- Tycho
4The Earth's precession is how many years?
- 26,000 Years
- 2,600 Years
- 25,000 Years
- 2,500 Years
5What causes the Earth's presession?
- Humans and the buildings ceated on the planet
- The momentum of the planet spinning in space.
- The Moon pulling the Earth trying to force the equatorial bulge into line with the Sun.
- The Sun pulling the Earth trying to force the equatorial bulge into line with the Sun.
6The Earth's axis is tilted at:
- 21 1/2 Degrees
- 12 1/2 Degrees
- 23 1/2 Degrees
- 15 2/3 Degrees
7The Earth's axis being tilted at 23 1/2 degrees causes:
- The weather
- The seasons
- Nothing
- Retrograde motion
8HOw long does it take for the Moon to complete one orbit around Earth?
- 1 Month
- 1 Year
- 100 Years
- 1 Light Year
9How far away is the Moon from the Earth?
- 150,00 KM
- 400,000 KM
- 12,700 KM
- 35,000 KM
10The Moon's length across is?
- 400,000 KM
- 2,500 KM
- 3,500 KM
- 35,00 KM
11The Moon's mass compared to the Earth's mass?
12Who was it who calculated the size of the earth to within 10% of the now accepted value by noticing the Sun light hit the bottom of a well?
- Eratosthenes
- Hipparchus
- Galileo
- Ptolomy
13What is it that the backward motion a planet makes in the sky?
- Obliquity of the Ecliptic
- Retrograde Motion
- Precession
- Solstice
14Who was it who devised the Earth centered planetary system. He explained retrograde motion by using smaller circles that were offset from the original orbital circle?
- Aristarchus
- Newton
- Ptolomy
- Copernicus
15Who tried to perfect Ptolomy's Earth centered system but was unable to do so? He also believed that the Sun goes around the Earth but the planets moce around the Sun?
- Kepler
- Hipparchus
- Halley
- Tycho
16Who was it who placed the Sun at the center of the solar system but had the planets move in oerfect circles which solved the problems of retrograde motion but not the problem that planets speed up and slow down in their orbits?
- Tycho
- Halley
- Kepler
- Copernicus
17Who was it who discovered the 3 laws of planetary motion?
- Halley
- Kepler
- Hipparchus
- Aristarchus
18Planets move in ellipses, planets sweep out equal area in equal time, and planets move more slowly the farther away they are from the Sun are all what?
- Nature of Planets
- Coriolis Law
- Laws of Planetary Motion
- Laws of Gravity
19Who used the telescope to discover: sunspots, venus had phases, the Milky Way is composed of stars, Jupiter has moons and the Moon has craters and mountains?
- Kepler
- Hipparchus
- Netwon
- Galileo
20Who was it who demonstrated that objects of different mass fall at the same rate so they hit the ground at the same time?
21Who was it who invented the pendulum clock based on his observations that a pendulum swings independent of its mass and only dependent upon its length?
- Ptolomy
- Galileo
- Eratosthenes
- Tycho
22Who discovered the Law of Gravity?
23What is the Law of Gravity?
- E = MC2
- F = Gm1m3/t4
- G = Fm2r11
- F = Gm1m22
24Objects in motion stay in motion, objects accelerate directly proportional to the force applied, and for every force on an object, there is an ewual and opposite force are all examples of what?
- Laws of Motion
- Laws of Gravity
- Laws of Planetary Motion
- Common Sense
25Who was it who predicted the return of a coment which made people take note of Newton's law of gravity?
- Newton
- Halley
- Galileo
- Kepler