Froggy Jumps 3.3 Formation of Planetary SystemsOnline version This is a review of some concepts in unit 3.3 by Andrea Klear 1 True or false: Gravity exists only on Earth a False, gravity is anywhere two objects are involved and one is larger b True, you must have the velocity of air in the Earth to work c True, you need a tree 2 With the nebular theory, what happened when the solar system was made? a a spinning cloud of dust flattened into a disk and became a star and orbiting planets b the moon ran into the Earth and spit out the sun into a dust gas ball of heat c the Earth became the center of a lot of ice and chunks of dust with the sun and planets orbiting 3 The moon ____ the Earth. a orbits b eclipses c rotates 4 Which theory is currently accurate? a heliocentric b geocentric c eccentric 5 Why doesn't the moon fly into the Earth? a gravitational force keeps it orbiting the sun which has less mass b the sun heats it so it stays in place c gravitational force keeps it orbiting Earth which has more mass 6 What unit of length would you use to measure roughly the distance from Earth to the Sun? a astronomical unit b feet c meters 7 Earth is a... a gas giant b terrestrial planet c star 8 The planets and moon travel around in what shape? a ellipse b circle c various shapes 9 How does velocity affect planets? a The closer a planet is to the Sun, the faster the pull and the faster it goes! b The farther a planet is to the Sun, the faster the pull and the faster it goes! c It will move right or left in an ellipse 10 If there is a solar eclipse, in what position is the moon? a it is moving around the sun b it is positioned next to Venus and far far away c it is blocking the sun from the Earth
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