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20 Cards in this Set
- Front
- Back
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What are the geocentric heliocentric systems?
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In the geocentric system, the Earth is at the center of the universe, whereas the heliocentric system is when everything is centered around the sun.
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What is an ellipse?
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An ellipse is an oval shape which may be elongated or circular.
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What objects make up our solar system?
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The solar system consists of the sun, eight planets, and their moons, and several kinds of smaller objects that revolve around the sun.
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What did Galileo contribute to our knowledge of the solar system?
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Galileo used the newly invented telescope to make discoveries that supported the heliocentric.
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How did Nicholas Copernicus contribute to our knowledge of the solar system?
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Copernicus was able to work out the arrangements of the known planets and how they move around the sun.
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How did Johannes Kepler contribute to the knowledge of our solar system?
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Kepler found that the orbit of each planet is an ellipse.
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What are the three layers of the sun's interior?
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The sun's interior is made up of a core, a radiation zone, and a convection zone.
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What are the three layers of the sun's atmosphere?
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The sun's atmosphere includes the photosphere, the chromosphere and the corona.
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What features form on or above the sun's surface?
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Features on the sun's surface include sunspots, prominences, and solar flares.
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What is the sun's core?
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The sun's core is its central region.
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What is nuclear fusion?
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In the process of nuclear fusion, hydrogen atoms join together to form helium.
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What is the radiation zone?
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The radiation zone is a region of very tightly packed gas where energy is transferred mainly in the form of electromagnetic radiation?
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What is the convection zone?
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The convection zone is the outer most layer of the sun's interior.
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What is the photosphere?
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The photosphere is the inner layer of the sun's atmosphere.
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What is chromosphere?
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The chromosphere is the middle layer of the sun's atmosphere.
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What is the corona?
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The corona is the outer layer of the sun's atmosphere. It looks like a white halo over the sun.
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What is solar wind?
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Solar winds are thin streams of electrically formed particles. The create the aurora.
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What is a sunspot?
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A sunspot is an area of gas on the sun's surface that's gas is cooler than the gas around it.
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What is a prominence?
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A prominence is a huge reddish loop of gas that often links different parts of sunspot regions.
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What is a solar flare?
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A solar flare is when loops in sunspot regions suddenly connect, releasing large amounts of magnetic energy. This energy heats gas on the sun to millions of degrees Celsius, causing the gas to erupt into space.
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