Answers edited by Azhar A.

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• How did Iron come to earth (millions of years ago)?
  
• Why do astronomers theorize that most of the matter in galaxies and clusters of galaxies is dark matter?
  
• Why do all planets in our solar system go around the sun in the same way?
  
• What is #63 * 64#?
  
• How can magnetic fields be created?
  
• What are meteors made of? What is a meteor called when it reaches the earth, and where is the largest one found on the earth?
  
• What is nucleosynthesis? How is it related to the Big Bang?
  
• Why are tundra plants usually small?
  
• How does time in space relate to time on earth?
  
• If the length of a #35 cm# spring increases to #73 cm# when a #3 kg# weight is hanging from it, what is the spring's constant?
  
• What is #15 + 24 + 6 + 5#?
  
• Why does the Moon appear to take on a colored hue during an eclipse?
  
• What is the difference between the Kuiper Belt and the Oort Cloud?
  
• What are pulsars and quasars?
  
• Question #7870d
  
• Why doesn't the sun have solids or liquids?
  
• How is the Doppler Effect used to measure the distance a stellar object is away from Earth?
  
• What are some common mistakes students make with skeletal structures in organic chemistry?
  
• Question #b4d33
  
• Which method relies on the mass of a dark object revealing its presence?
  
• Does the following sentence have any personal pronouns? If so, where?: She saw three cars pull into her driveway, as we spoke on the phone.
  
• What are some ways to desalinate ocean water?
  
• How has the Doppler effect and the redshift of stars and galaxies indicated that the universe is expanding?
  
• How does the earth's moon compare to moons of gas giant planets?
  
• How would a nuclear explosion look in space?
  
• How can elementary particles decay?
  
• How big is a star's photosphere?
  
• Does Canada publish any Astronomical Ephemeris or Nautical Almanac annually, such as being done in USA, UK, INDIA etc?
  
• What is #14.3 * 2.1 * 8.9#?
  
• Why do astronauts in space experience less gravitational force than they do on earth?
  
• How do electromagnetic waves travel?
  
• What is Rayleigh scattering?
  
• Why does electromagnetic radiation in the ultraviolet region represent a larger energy transition than does radiation in the infrared region?
  
• How do you explain an eclipse?
  
• Are scientists currently building an infrared telescope designed to observe fusion reactions in the Sun’s core?
  
• How can heat travel through space if it is a vacuum?
  
• Is the amygdala in the lymbic system or in the temporal lobe?
  
• How do you translate "x+4/7=2(x-4)/6" into a verbal expression?
  
• What is the age of meteorites?
  
• What is calculated by speed of light/wavelength?
  
• How can meteorites be interplanetary arks?
  
• What is Jupiter's ephemeris?
  
• What are the sun's interior layers?
  
• What are supernovas made of?
  
• Question #b0ae0
  
• How can photons have momentum?
  
• Can you explain the energy transformations that occur when moving from one trophic level to the next in an energy pyramid?
  
• What is the sun's heliosphere?
  
• Alpha Centauri, the nearest star, is just over 4 light years away. Traveling at a speed of 2000 miles per hour (the speed of a fast jet airplane), how long would it take to get there in years?
  
• Question #8cd0c
  
• What is the difference between brown dwarfs and Jupiter?
  
• How many solar systems are in the Milky Way Galaxy?
  
• How big can meteors get?
  
• Control of India and Hong Kong made Britain a major colonial power on which continent?
  
• What is an eclipse compared to occultation?
  
• What is the string theory? How is it related to space time?
  
• With no nuclear reaction occurring, are brown dwarfs visually observable?
  
• If x-rays are normally absorbed by the earth's atmosphere, how do astronomers overcome this issue when studying celestial temperatures?
  
• How does color affect light absorption?
  
• What makes the speed of light exactly 299,792,458 metres per second?
  
• How do you use the Pythagorean Theorem to determine if the three sides are a right triangle: 9 in, 12 in, 15 in?
  
• What are supermassive black holes?
  
• What are meteors? When were they formed?
  
• If black holes are invisible how do we know they exist?
  
• What is the next stage of the sun's evolution?
  
• What is the star with the largest proper motion?
  
• How does organic chemistry relate to medicine?
  
• Can sound waves travel on moon? Is it possible that we could hear a sound on moon?
  
• Do planets ever fall out of orbit?
  
• Who developed the maser?
  
• How far is Jupiter from the Earth?
  
• What is the derivative of #(x^2-2)/(x)#?
  
• Why don't we have eclipses every month?
  
• Can a stars contain mostly one element?
  
• How do you find the derivative of #F(x) = 1/(x-5)#?
  
• What is the smallest elementary particle?
  
• What are Magellanic clouds? How were they discovered?
  
• What are elementary particles?
  
• Why is there a super-massive black hole thought to be in the center of each Galaxy?
  
• What is a complete subject, simple subject, and a verb?
  
• How does gravity keep a planet moving in an orbit around the sun?
  
• How did the Spanish-American War affect both the Philippines and Cuba?
  
• What is the size of the planet Saturn?
  
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