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31 Cards in this Set
- Front
- Back
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Our solar system is inside the...
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Milky Way galaxy.
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In stars, energy is produced primarily as hydrogen atoms are combined to form...
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Helium Atoms.
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The inner planets are seperated from the outer planets by...
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An asteroid belt.
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A star is born when...
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Nuclear fusion starts in the core.
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Spiral galaxies often appear bluish due to an abundance of...
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Young stars.
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The big bang theory states that the universe began with a gigantic explosion...
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10-20 billion years ago.
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Which of the following is not a inner planet?
Jupiter, Mars, Earth, Venus? |
Jupiter.
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Mercury is characterized by...
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Very extreme temperatures.
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Astronomers estimate that the universe contains...
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100 billion galaxies.
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________ first propsed that Earth and the other planets orbit the sun...
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Copernicus.
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All of the planets in our solar system do what?
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Orbit the sun.
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During a solar eclipse...
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The moon blocks out the sun.
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The numberof universes known to exist is...
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One.
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Three phases of the moon are determined by...
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The relative positions of Earth, sun, and moon.
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The sun is...
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A typical star.
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Most of the stars in the Milky Way will wnd their lives as...
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White dwarfs.
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Elliptical galaxies often appear reddish due to an abundance of...
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Old stars.
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The Great Red Spot is believed to be a giant storm in the atmosphere of...
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Mars.
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Clusters of galaxies can form larger groups called...
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Superclusters.
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Not including the sun, the closest stars to Earth are...
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4.3 light-years away.
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Hotter stars glow with light that is more intense at...
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Shorter wavelengths (toward the blue end of the spectrum).
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Stars are held together by...
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Gravitational forces.
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The surface temperature of a star can be estimated based on the star's...
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Color.
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Galaxies are classified based on their...
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Shape.
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The continental is deepest beneath...
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Mountains.
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Oceanic crust is...
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Thinner and more dense than continental crust.
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About 80% of Earth's volume is made up of...
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Mantle.
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Earth's inner core is...
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Hot and Solid.
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Earth's lithosphere is composed of..
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THe crust and the upper portion of the outer core.
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One hypothesis states that plate movement results from convection currents in the...
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Asthenosphere.
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A geogolic feature of divergent plate boundaries in oceanic crust is called a zone of...
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Rifting.
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