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science
The Sun
| Question | Answer |
|---|---|
| Sun's__________---energy created in the core moves outward through the radiation zone and the convection zone and into the Sun's atmosphere | layers |
| __________ is the lowest layer gives off light and about 6,000 K | photosphere |
| ___________ is the next layer about 2000 km above the photosphere | chromosphere |
| Extending millions of km into space, the 2 million K _________ releases charged particles as solar wind | corona |
| __________--dark areas cooler than their surroundings | sunspots |
| Increase and decrease in a 10 to 11 year pattern called ___________ cycle | solar active |
| Sunspots are related to _____________ | intense magnetic field |
| Magnetic fields may cause ____________-huge, arching gas columns | prominences |
| Violet eruptions near a sunspot are called ________ | solar flares |
| Bright ____________(CMEs) appear as a halo around the Sun when emitted in the Earth's direction | coronal mass ejection |
| Highly charged ______________ can disrupt radio signals | solar wind particles |
| Near Earth's polar areas solar wind material can create light called an __________. | auroras |
| How is the energy of the Sun produced? | The energy of the sun is produced by when helium and hydrogen fuse together |
| The two types of ________. galaxies are barred and normal | spiral |
| A __________ is a group of galaxies | cluster |
| ______________ galaxies have many different shapes and are usually smaller and less common than other types of galaxies | irregular |
| An elliptical galaxy about 2.9 million light-years away is in the constellation of _____________. | Andromeda |
| Galaxies shaped like footballs are ________ galaxies | elliptical |
| Two irregular galaxies called the _____________________ orbit the Milky Way | Clouds of Magellan |
| A _______________ is a large group of stars, gas, and dust held together by gravity | galaxy |
| The ____________________ is an explanation for the formation of the universe | Big Bang Theory |
| The _________________ causes changes in the light coming from distant stars and galaxies | Doppler Shift |