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Science Praxis 5005
earth and space
| Question | Answer |
|---|---|
| paleontology | studies the history of life on Earth |
| earth is believed to be | 4.5 billion years old |
| earth's magnetic field | deep within the earth , protects the earth from harmful solar wind particles. Responsible for the northern lights (aurora borealis) |
| solar wind | charged particles escape form sun's gravitational pull |
| what wold be most different about an object on Mars the Earth | weight |
| 4 inner planets | solid |
| 4 outer planets | gas |
| super nova | when a star explodes, Create almost all heat elements in world |
| astronomy | the study of space |
| sun | star at the center of earth's solar system. Hydrogen and helium, |
| Nuclear fusion | how the sun shines and produces heat When lighter elements become heavier |
| earth | is closer to the sun than it is to other stars |
| radiation | heat comes from sun to earth |
| galaxy | our solar system is a part of a bigger star system called |
| galaxy is made up of | stars, dust and gas. It is the home to Earth: Milky Way |
| Planet most like Earth's size | Venus |
| Comet | made of ice, dust and gas |
| meteroid | light flashing in sky |
| if you drop ball from space | fall slower and take longer |
| absolute magnitude | light emitted by star |
| star explodes | 15 light yrs away |
| venus | planet that orbits closet to Earth |
| Jupiter | has the shortest days |
| Mercury | terrestrial planet |
| Uranus | planet with abnormal tilt on axis |
| The tilt of the Earth's axis causes | days and times to differ |
| burning fossil fuels and volcanic activity | carbon dioxide on earth's atmosphere |
| largest planet furthest from the sun | Neptune (4th largest in solar system) |
| it takes Earth | one day to rotate on its axis |
| it takes one year | for the Earth to revolve around the sun |
| the moon revolves around Earth in | one month (27 days) |
| Earth | sees different moon phases because the sun lights different parts of the moon |
| Nitrogen | makes up 78% (earth's largest quantity of gas) of the earth's atmosphere |
| lunar eclipse | when the earth moves between the moon and the sun (sun, earth, moon) |
| solar eclipse | when the moon lines up between earth and the sun (blocking sunlight. cast shadow over earth) |
| total solar eclipse | new moon |
| carbon | is the most common element in the universe |
| black hole | a massive star with a gravitational field so strong that even light cannot escape |
| aurora | occurs when particles from the solar wind are trapped in the earth's magnetic field |
Created by:
swomble