BYU Earth Science Part 2 Final exam with correct answers

BYU Earth Science Part 2 Final exam
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with correct answers |\ |\




How are light waves different from x-rays? - CORRECT ANSWERS
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✔✔They have different wavelengths
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What do we know about the elements found on Earth? -
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CORRECT ANSWERS ✔✔They are the same as elements found
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throughout the universe. |\ |\




How does energy travel through space? - CORRECT ANSWERS
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✔✔Energy travels through space in the form of electromagnetic
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waves. Some examples of these are light waves, ultraviolet rays,
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x-rays, etc. |\




What is matter? - CORRECT ANSWERS ✔✔Matter is what
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everything in the universe is made of, and matter itself is made
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of atoms.
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What is the most common element in the universe? - CORRECT
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ANSWERS ✔✔Hydrogen |\




How does the force of gravity on an astronaut change as the
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astronaut moves further away from a planet? - CORRECT
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ANSWERS ✔✔The force gets weaker as the astronaut moves
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away.

,Which has a greater force of gravity, the earth or the moon? -
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CORRECT ANSWERS ✔✔Earth has a greater force of gravity
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because it is larger. |\ |\ |\




What are the two main parts of a galaxy? - CORRECT ANSWERS
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✔✔The center, or core, and the spiral arms.
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What principle objects make up a galaxy? - CORRECT ANSWERS
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✔✔Stars, nebulas, and planets. |\ |\ |\




What is a nebula? - CORRECT ANSWERS ✔✔It is a vast cloud of
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hydrogen gas and dust. Nebulas are the places where stars form.
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Where are we in the Milky Way galaxy? - CORRECT ANSWERS
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✔✔We are two-thirds of the way out in the Orion spiral arm.
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Why can't astronomers see into the exact center of a galaxy like
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our Milky Way? - CORRECT ANSWERS ✔✔There are too many
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stars—it is like being in the forest and not being able to see very
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far because all the trees block your view.
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What force holds the millions of stars together in a galaxy? -
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CORRECT ANSWERS ✔✔The force of gravity. |\ |\ |\ |\ |\




List three ways that the sun affects planets. - CORRECT
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ANSWERS ✔✔Among other things, the sun causes auroras on
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planets, heats planets, provides light for planets, and keeps
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planets in rotation through the force of gravity.
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,Which four planets are considered gas giants? - CORRECT
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ANSWERS ✔✔Jupiter, Saturn, Uranus, Neptune |\ |\ |\ |\




What force holds the planets in orbit around the sun? - CORRECT
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ANSWERS ✔✔gravity |\




Why does Earth have seasonal climate changes? - CORRECT
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ANSWERS ✔✔Earth is tilted, and the part that receives the most
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sunlight changes as Earth orbits the sun.
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Which planet has a climate most like Earth? - CORRECT
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ANSWERS ✔✔Mars |\




Explain why our solar system is the shape of a disk. - CORRECT
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ANSWERS ✔✔The nebula our solar system formed in was slowly
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spinning. As the force of gravity increased, more of the nebula
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was pulled toward the center and it spun faster. As a result of
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spinning faster, it eventually formed a flat, disk-like shape.
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Which four planets are considered terrestrial or Earth-like? -
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CORRECT ANSWERS ✔✔Mercury, Venus, Earth, Mars
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The smallest, inner planets are considered terrestrial because
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they all have solid crusts like Earth.
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, How does the core of the earth affect its environment? -
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CORRECT ANSWERS ✔✔It produces the magnetic field that helps
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birds and fish migrate and powers a compass.
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What is the energy source that causes the plates of the
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lithosphere to move around? - CORRECT ANSWERS ✔✔heat from |\ |\ |\ |\ |\ |\ |\ |\ |\


the mantle
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Earthquakes, landslides, and mountain-forming are all related to |\ |\ |\ |\ |\ |\ |\ |\


which of the earth's layers? - CORRECT ANSWERS ✔✔lithosphere
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How does the atmosphere protect life? - CORRECT ANSWERS
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✔✔It provides oxygen and carbon dioxide. It keeps the surface of
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the earth warm. It blocks out harmful ultraviolet and cosmic rays
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from outer space.
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Which of the following systems would include rivers, lakes, ice
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caps, and ground water? - CORRECT ANSWERS ✔✔Hydrosphere
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How is the lithosphere different from the asthenosphere? -
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CORRECT ANSWERS ✔✔The asthenosphere is a solid, but moving,
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layer of semi-molten rock; the lithosphere is the solid crust on
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top.


What happens to an ecosystem if the biotic and abiotic are not
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balanced? - CORRECT ANSWERS ✔✔The system cannot function,
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which will eventually result in ecological upset and collapse.
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