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Sci9 - Solar System
Earth and Space (Chpt 8.1)
| Question | Answer |
|---|---|
| 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 |
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