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| A substance through which a wave can travel |
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| A wave that does not need a medium but can go through matter |
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| Any disturbance that transmits energy through matter or empty space |
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| The lowest point between crest of a wave |
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| A wave in which the particles of the medium vibrate back and forth along the path that the wave moves |
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| The highest point of a transverse wave. |
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| A wave in which the particles of the medium vibrate in an up-and down motion |
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| A wave that requires a medium through which to travel |
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| Solar System is often creditied to Ptolemy, an Alexandrian Greek, although the idea is very old. |
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| Copernicus proposed a sun-centered sola system in the 1500s |
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| Whcih of the following waves require a medium? |
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| Which of following units are used to measure frequency? |
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| Sound is created by . . . |
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| The complete back-and-forth motion of objects |
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| A substance through which a wave can travel is a . . . |
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| Which of the following is not a medium? |
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| One thing you can do to protect your hearing is to . . . |
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| Sit in the back of the room in a Rock Concert |
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| Flap of skin at the end of the ear canal |
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| Where does the pinna direct sound to? |
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| Where does the size of vibrations get bigger? |
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| Tilted 23* on its axis? Reason for seasons |
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| Has an ozone layer (composed of O3) that resides in the atmosphere? absorbs harmful UV |
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| Sunlight shines equally on the northern and southern hemispheres |
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| Is thought to hvae formed after a giant collision between early Earth and a smaller space body |
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| The phase after the new moon when the amount of reflected light increases |
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| Huge cloud of gas and dust that collapsed into a flattened disk |
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| Measure of how much matter an object is made of . . . |
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| The motion of one body around another, such as Earth orbiting around the sun |
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| The process of change in a crust due to the motion of hot material underneath |
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| The breaking down of rocks into smaller pieces; mostly caused by movements of water, wind, and ice |
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| Planetary conditions would be very different without it, we would not survive |
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| The Phase when the full moon has passes and the amount of reflected light decreases |
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| Occur because of the Moon's gravitity changes the shape of Earth's oceans. |
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| Shoots out streams of high energy particles |
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| Huge loops of glowing gas that extend into the corona |
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| Mercury, Venus, Earth & Mars |
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| Have deep atmospheres, rings, and many satellites |
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| The outer layer of gases of a large body in space |
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| Also known as the orbital Period |
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| Has three layers, crust, mantel, and core |
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| Determined that other galaxies exist |
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| The process of galaxies colliding to creat a larger is known as . . . |
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| Deals with orgin, large-scale properties and the evoloution of the observable universe |
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| Space and all the matter and energy in it |
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| Thought to expanded within a second from something the size of a spec of dust to the sixe of our solar system |
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| The farther away a galazy is, the faster it is moving away from us |
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| A large hot ball of gas which generates energy in its core by nuclear reactions |
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| A large assemblage of stars (and often gas and dust), typically containing millions to hndreds of billions of member star |
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| Have arms of stars, gas, and dust that curve away from the center of the galaxt in a spiral pattern |
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| Shaped like spheres or egss; have almost no dust or gas between stars; contain old stars |
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| faint galaxies without a definite shape; smaller than the other types of galaxies |
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| group of stars that form a pattern in the sky |
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| The sun and all things orbiting around it, including the 8 major planets, their satellites, and all the smaller pieces such as asteroids and comets |
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| A major object which orbits around a star |
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| Small, solid, rocky bodies that orbit close to the Sun |
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| Solid debris fro space (asteriods) that are moving towards Earth |
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| Often referrred to as Shooting Stars |
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| A small body of ice and dust that orbtits the Sun |
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| An object that orbits a more massive object |
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| Unit of distance equal to the average spacing between the Earth and the Sun |
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| The apparent shift in position of an object when viewed from different locations |
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| Planets orbit the sun in an elliptical path |
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| Determined that a planet moves faster when near the sun, & slower when far from sun |
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| When a very massive star gets old and runs out of fusionable material, gravitation forces may cause it to collapse to a mathematical point - a singularity |
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| The movemnt or path of the earth or heavenly body turning on its axis |
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