Alexis H's Exam notes
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| What organelle is found only in plants? | Chloroplast
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| The cell theory consists of how many ideas? | Three
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| What are the different levels of cell organization from cell to organism. | Cells, tissues, organs, and organism.
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| Nerve cells are long and have many branches. This shape allows them to do what? | send and to receive messages.
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| what provides support and protection for the plants cell? | membrane
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| How are igneous rocks formed? | when melted rock from inside the earth cools.
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| How are metamorphic rocks formed? | New rocks that form when existing rock are heated or squeezed.
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| How are sedimentary rocks formed? | broken pieces of rock, shells mineral grains and other materials squeeze together.
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| What are the characteristics of a mineral? | they are luster, cleavage, crystals, streaks, color, double refraction, magnetism and reaction with acid..
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| How many minerals have been discovered? | more than 4000
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| What does the word metamorphic mean? | change
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| The size of minerals crystals in igneous rock depends on what? | It depends on its temperature and how long it takes the rock to cool.
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| How are rocks classified? | How they form
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| When the force on rock is great enough they break producing vibrations called what? | earthquakes
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| Most earthquakes happen where? | where 2 plate boundries meet.
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| What is the length of time for the earth rotate once on its axis and and to revolve around the sun once? | 24 hours for the Earth to rotate on its axis, and 365 days to revolve around the Sun.
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| What is the length of time for the moon to rotate around the earth and once on its axis | 27.3 days
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| What causes seasons? | Earth tilled on its axis and its rotation around the sun.
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| What is one astronominal unit (AU)? | An Astronomical Unit is approximately the mean distance between the Earth and the Sun
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| What is a light year? | The distance that light travels in a vacuum in 1 year; 5.88 trillion miles or 9.46 trillion kilometers
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| The Sun is the center of what? | Our solar system
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| What is the order that a solar eclipse is in? | Sun...Moon...Earth
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| What is the order that a lunar eclipse is in? | Sun...Earth...Moon
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