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Unit 5-Earth & Univ.

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Question
Answer
An object is pulled to Earth by   gravity  
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Gravity is the force that determines the   weight of matter  
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Because the earth rotates on its axis, we have   day and night  
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Why does almost all of earth have different seasons?   Earth is tilted on its axis as it revolves around the sun during a year.  
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How long does it take Earth to revolve around the sun?   One year  
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If the Eastern Hemisphere is experiencing nighttime, where is the sun?   In the Western Hemisphere  
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What would be a demonstration of how the force of gravity pulls objects towards the center of Earth?   Throwing a ball in the air and it falls to the ground.  
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When the sun's rays are more directly over the northern hemisphere, what season would the US experience?   Summer  
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What would happen if the Earth rotated faster?   Our days would be shorter  
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Where does the sun rise?   The east  
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Where does the sun set?   The west  
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Why would a satellite orbiting Earth most likely fall into the atmosphere?   Gravity's pull  
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There are 88 named constellations.   True  
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Constellations are a group of stars.   True  
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Constellations are usually named after animals or people in stories.   True  
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All the constellations can be seen anywhere on a clear night.   False  
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Why do we have a day that is 24 hours long?   It takes 24 hours for the Earth to rotate once around the sun.  
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Why would a shadow of a tree move from one side to another during different times of the day?   Because the Earth rotates on its axis  
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What causes day and night?   The rotation of Earth on its axis.  
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Why does Earth have different seasons?   Because the Earth tilts on its axis as it revolves around the sun.  
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What part of Earth receives more solar energy?   The equator.  
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How does the heat from the sun affect the temperature of our atmosphere?   The temperature is always changing.  
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What type of star is the sun?   A medium-sized star.  
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Star   a massive ball of gas in outer space that gives off heat, light and other forms of radiation  
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Radiant energy   energy that does not need matter to travel; light  
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Season   a period of the year determined by the position of Earth as it revolves around the sun  
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Galaxy   a group of solar systems, dust, and gas held together by gravity; our solar system is part of the Milky Way galaxy  
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Orbit   the circular or elliptical path of an object as it revolves around another object  
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Astronomy   the study of the properties and behavior of bodies in outer space  
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Space   the large, empty part of the universe that does not contain any matter  
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Constellation   a particular area of the sky; a group of stars usually named for animals or people in stories.  
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Axis   an imaginary line that an object spins or revolves around  
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Telescope   an instrument used to observe objects that are far away  
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Rotate   turning around on an axis; spinning  
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Universe   everything that exists in, on and around the Earth  
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Small stars are brighter than large stars.   False  
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Stars are different colors depending on how hot they are.   True  
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The brightness of a star is called magnitude.   True  
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Very hot stars are blue and the coolest stars are red.   True  
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The sun is the source of light.   True  
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The sun is a huge sphere of burning gas.   True  
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Hydrogen keeps a star shining.   True  
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Stars close to Earth appear brighter.   True  
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The moon and sun are both stars.   False  
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The sun's light is so bright that stars cannot be seen during the day.   True  
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Which is similar to the sun in terms of composition?   stars  
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What would happen if Earth rotated faster?   Each day would be shorter.  
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Why does the sun appear to rise in the east and set in the west?   Because the Earth rotates on its axis.  
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