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Alexis Science Exam

Alexis H's Exam notes

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