# Earth Science-scientists/famous Astronomers

22 Questions  I  By Caraj

Changes are done, please start the quiz.

 1 The greater the mass of the object....
 A. The lesser the gravitational force
 B. The greater the gravitational force
 C. The more sunspots
 2 Who calculated that the earth and the sun, but were too small
 A. Kepler
 B. Aristarchus
 C. Galileo
 3 The force of gravity acting upon an object is...
 A. Mass
 B. Density
 C. Weight
 4 Galileos most important contributions were...
 A. The three laws of planetary motion
 B. His descriptions of the behavior of moving objects
 C. His work with the sun
 5 And AU is NOT equal to...
 A. The earths distance from the sun
 B. 150 million kilometers
 C. 8.3 light-minutes
 6 Who spent 20 years plotting the planets
 A. Kepler
 B. Brahe
 C. Copernicus
 7 Who first used a telescope
 A. Brahe
 B. Copernicus
 C. Galileo
 8 Keplers 2nd law of planetary motion states:
 A. The path of each planet around the sun is an ellipse, with the sun at one focus
 B. The square length of time it takes a planet to orbit the sun is proportional to it distance around the earth
 C. Each planet revolves so an imaginary line connecting it to the sun sweeps over equal areas at equal time intervals
 9 True or false: the moon surface is smooth
 A. True
 B. False
 10 True or false: the orbit of mars and other planets are ellipses, not circles
 A. True
 B. False
 11 the plotemic system was..
 A. An autobiography
 B. A volume about the movements of planets
 C. Book about the measuring of planets
 12 True or false: a moving object will continue to move at a constant speed and in a straight line with gravity is called inertia
 A. True
 B. False
 13 Who created the law of universal gravitation
 A. Newton
 B. Galileo
 C. Brahe
 14 Keplers third law states that the square length of time it takes a planet to orbit the sun is proportional to the cube of its mean distance from the...
 A. Earth
 B. Sun
 C. Moon
 15 What did galileo NOT discover...
 A. Four satellites, or moons orbiting jupiter
 B. Discovery that the planes are just points of light
 C. Venus had phases, just like the moon
 16 Who discovered the three laws of planetary motion, plus had a strong mathematical mind
 A. Kepler
 B. Brahe
 C. Galileo
 17 who discovered earth was a planet
 A. Kepler
 B. Copernicus
 C. Brahe
 18 According to........, every body in the universe attracts every other body with a force that is directly proportional to their masses and inversely proportional to the square of the distance between their mass ( law of gravitation)
 A. Newton
 B. Galileo
 C. Kepler
 19 What is a sunspot, who discovered it?
 A. Dark regions, kepler
 B. Dark regions, galileo
 C. Light, swirling lava, brahe
 20 Who made most of mars obervations, plus were more precise then before
 A. Brahe
 B. Kepler
 C. Galileo
 21 As mars moves away from the sun it...and when it moves toward the sun it....
 A. Slows down....speeds up
 B. Speeds up....slows down
 C. Gets hotter....gets cooler
 22 Who proposed the model of the solar system with the sun at the center
 A. Copernicus
 B. Kepler
 C. Brahe
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