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19 Cards in this Set
- Front
- Back
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Core |
The central region of the Sun, where nuclear fusion takes place. |
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Nuclear Fusion |
The process by which hydrogen atoms join together in the Sun's core to form helium. |
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Radiation Zone |
A region of very tightly packed gas in the Sun's interior where energy is transferred mainly in the form of light. |
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Convection Zone |
The outermost layer of the Sun's interior. |
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Photosphere |
The inner layer of the Sun's atmosphere that gives off its visible light. |
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Chromosphere |
The middle layer of the Sun's atmosphere. |
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Corna |
The outer layer of the Sun's atmosphere. |
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Sunspot |
A dark area of gas in the Sun's surface that is cooler than the surrounding gases. |
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Solar Flare |
An eruption of gas from the Sun's surface that occurs when the loops in sunspot regions suddenly connect. |
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Terrestrial Planets |
The name is often given to the first four inner planets: Mercury, Venus, Earth, and Mars. |
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Greenhouse Effect |
The trapping of heat by a planet's atmosphere. |
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Gas Giant |
The name is often given to the first four outer planets: Jupiter, Saturn, Uranus, Neptune. |
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Ring |
A thin disk of small ice and rock particles surrounding a planet. |
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Comet |
A loose collection of ice, dust, and small rocky particles, typically with a long, narrow orbit. |
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Meteoroid |
A chunk of rock or dust in space. |
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Meteor |
A streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere. |
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Meteorites |
A meteoroid that passes through the atmosphere and hits Earth's surface. |
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Asteroids |
Rocky objects revolving around the Sun that are too small and too numerous to be considered planets. |
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AsteroidT Belt |
The region of the solar system between the orbits of Mars and Jupiter, where many asteroids are found. |
