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Sci9 - Solar System

Earth and Space (Chpt 8.1)

QuestionAnswer
Astronomy is the study of what is beyond earth
What is a celestial object Celestial objects are any object that exists in space
The universe refers to everything that exists including all energy, matter and space
Stars are made up of A massive collection of gases, held together by its own gravity and emitting huge amounts of energy
The Sun is _______times the mass of Earth The Sun is 340,000 times the mass of the Earth.
The Sun is ________times the volume of Earth The Sun is 1,300,000 times the volume of the .Earth.
How far is the Sun away from Earth The Sun is 1.5 x 108 km away from Earth
What does the Sun provide the Earth? The Sun gives off radiant energy and solar wind allowing for life on Earth
The Sun and Other Stars Average in size
The Sun appears bigger and brighter because it is closer to Earth
Next closest star to Earth is 4.3 x 1013 km away
A planet is a large, round celestial object that travels around a star
What are the eight planets travel around the Sun Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
What makes up the Solar System The sun and all the planets that travel around the Sun make up the solar system
Is Pluto a planet No, in 2006, it was reclassified as a “dwarf planet”
How many Terrestrial Planets are there and name them The 4 planets closest to the sun are terrestrial. They are Mercury, Venus, Earth and Mars.
Describe terrestrial planets They have a hard rocky surface similar to Earth’s
The four planets furthest from the sun are classified as Gas Giants
The Gas Giants are Jupiter, Saturn, Uranus and Neptune
Gas Giants are composed mostly of gas and liquids
A moon is a satellite
A Satallite is a celestial object that travels around another planet or dwarf planet in an orbit
An orbit is a closed path around a planet or dwarf planet
Our moon has a diameter that is one quarter the size of the diameter of Earth
How many kms is our moon from Earth The moon is 384,000 km away from Earth
What are Galaxie s Galaxies are huge, rotating collections of stars, gas, dust, planets and other celestial objects
What galaxy do we live in Our galaxy, is the Milky Way
Does the Milky Way include the Sun YES, along with 200 billion stars
Created by: studynotes
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