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18 Cards in this Set
- Front
- Back
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What was Ptolemy's contribution?
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the geocentric model of celestial motion
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What was Copernicus' contribution?
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the heliocentric model
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What was Galileo's contribution?
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confirmed heliocentric model
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What was Kepler's contribution?
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strengthened the validity of the heliocentric model by finding that planets orbit in elliptical paths
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What is an eclipse?
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the total or the partial overshadowing of one celestial body by another
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What is a lunar eclipse?
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an overshadowing of the Moon that occurs when Earth lies directly between the Moon and the Sun during a full moon phase
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What is a solar eclipse?
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an overshadowing of Earth that occurs when the Moon is between the Sun and Earth and the Moon blocks the Sun's light
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What is the relationship between the Earth and the Moon?
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Because the Earth and Moon are so close together, the Earth is affected by the Moon's gravitational pull. The Moon has its effect on Earth's oceans.
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How do Earth's tides work?
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As the Moon orbits the planet, the lunar gravity attracts the water in the oceans; the ocean level rises in some areas while it drops in others (high tides and low tides)
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What is an axis?
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an imaginary line through Earth, extending from the North Pole to the South Pole; Earth spins on its axis of about 0.5km/s
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What is an axis tilt?
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the tilt of Earth on its axis, 23.5 degree from the flat plane of Earth's orbit
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Which way does Earth spin?
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from west to east
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What do we experience because of Earth's axis tilt?
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seasons
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What is the relationship between tilting and seasons?
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-tilting toward the sun, we experience summer
-tilting away from the sun, we experience winter |
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What happens in a summer solstice?
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marks the longest day of the year; point in Earth's orbit around the Sun when the Sun's path across the sky is the highest
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What happens in a winter solstice?
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marks the shortest day of the year; point when the Sun's path is low, closer to the horizon
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What are constellations?
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distinctive patterns in the night sky formed by groups of stars; the patterns often look like familiar objects, such as animals
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What are shooting stars?
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meteoroids that burn up as they pass through Earth's atmosphere
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