Answers edited by Suryin =)

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• Question #f1663
  
• Why do igneous rocks have crystals?
  
• Why do astronomers use light-years to measure distances to stars and galaxies?
  
• What is friction and what caused them?
  
• What quadrant would #(-2,1)# be?
  
• A square has an area of 0.09 square inches. How do you find the perimeter of the square?
  
• What is the equation of the line with slope # m= 15/17 # that passes through # (-1,2/3) #?
  
• The perimeter of a square is 40cm. How do you find its area?
  
• How do waves cause erosion and deposition?
  
• How many Astronomical Units is 1 parsec?
  
• What does it mean when a star dies?
  
• How do you solve #x^2=13x-42#?
  
• How can sedimentary rocks become metamorphic rocks?
  
• How many neutrons are in an atom of chlorine?
  
• What is weathering and how is it different from erosion?
  
• What is the life cycle of a star from birth to death?
  
• How do you write 1,010,000,000,000,000 in scientific notation?
  
• What is the exact distance from the Earth to the Sun?
  
• How is the magnitude of a star defined?
  
• How do you read a topographic map?
  
• What would happen if someone entered a black hole?
  
• How are black holes different from neutron stars?
  
• What are the layers of the earth?
  
• How does a cepheid variable differ from other stars?
  
• How do you simplify #5s +s#?
  
• What is the actual shape of the earth? Why is it shaped that way?
  
• What are the four Jovian planets and what are their characteristics?
  
• How does a metamorphic rock change into another type of metamorphic rock.?
  
• Question #4d7e1
  
• Who was the geologist who in 1830, renewed the idea of uniformitarianism by showing that gradual changes in some organisms could be represented in successive fossil layers?
  
• How do you solve #-4r^2=-196#?
  
• Why is the solar system important?
  
• Which galaxy is closest to earth?
  
• I am a polygon. I am a quadrangle. All of my sides are the same length. What am I?
  
• What is the size of the Earth compared to the moon?
  
• Which has more momentum, a #8kg# object moving at #9m/s# or a #4kg# object moving at #7m/s#?
  
• Why do the outer planets have more moons compared to the inner planets?
  
• What is shear?
  
• How can black holes be detected if they are invisible?
  
• What metamorphic rocks are formed from shale?
  
• How many earth years does it take Pluto to orbit the sun?
  
• What is the slope of the line passing through the following points: # (5,-3) , (7,3)#?
  
• What causes an earthquake?
  
• How do scientists map the seafloor?
  
• What is the vertex form of #y=-9x^2 +12x - 18 #?
  
• How does sedimentary rock change into igneous rock?
  
• How many kinds of telescopes are there?
  
• What organelle contains digestive enzymes and helps digest waste inside the cell?
  
• What is Sputnik?
  
• Why is mapping the seafloor important? What does it help scientists understand?
  
• How does the distance a planet is from the sun affect its period?
  
• An isosceles triangle has sides A, B, and C, such that sides A and B have the same length. Side C has a length of #8 # and the triangle has an area of #16 #. What are the lengths of sides A and B?
  
• What is the difference between the earth's rotation and revolution?
  
• What is decay?
  
• What is the diameter of the moon in comparison to the earth?
  
• How do you simplify #7sqrt108#?
  
• What is the area of an equilateral triangle that has a side length of 4?
  
• Question #732c8
  
• How does the earth's rotation differ from its revolution?
  
• What is a newly formed star referred to as?
  
• Why is the atmosphere important to life on earth?
  
• What is the closest planet to the sun?
  
• What is a cinder cone? What eruptive styles are common at cinder cones?