Space

• What is the sun?

  A star
• Why do stars not look as bright as the sun?

  They are a lot further away
• What do people group stars into?

  Constellations
• What is our galaxy called?

  The milky way
• How many galaxies are in the universe?

  Millions
• What is the mass of something?

  The amount of substance or matter
• what is mass measured in?

  kg
• what is weight?


  force of gravity pulling on a mass
• what is weight measured in?

  Newtons
• How much force does gravity pull on every kg of mass on earth?

  10 Newtons
• Why is gravity not as strong on the moon?

  The moon has a much smaller mass than earth
• Why would your weight be less on the moon than on earth?

  The Moon's gravity is weaker
• In what way does the sun's gravity keep all planets moving around it?

  elliptical orbit
• What is a satellite

  Anything that orbits around a planet
• What satellites are used for communication?

  Geosynchronous
• What satellites are used to take pictures of earth for monitoring weather or spying?

  Polar orbiting
• What is the name given to the shape of the orbit of comets?

  Ellipse
• How long is a year?

  365.25 days
• How long is a lunar month?

  27.3 days
• what is a lunar month

  How long it takes for the moon to orbit earth
• What season is it in the uk when the northern hemisphere is tilted towards the sun?

  Summer
• Why does it feel hotter?

  The sun's rays are more concentrated
• The moon orbits the earth every 27.3 days
• Where do geosynchronous satellites orbit on earth?

  Above a certain point on earths surface over the equator
• At what speed do geosynchronous satellites orbit?

  The same time it takes for earth to rotate
• Polar orbiting satellites are much closer to earth's surface than geosynchronous satellites
• At what speed do polar orbiting satellites orbit?

  Quicker than geosynchronous satellites
• Why do polar orbiting satellites travel at high speeds?

  Gives a more detailed view and a bigger coverage of the Earth's surface
• what poles do polar orbiting satellites cover

  North Pole to the South Pole
• Do polar orbiting satellites cover all of earth's surface?

  Yes
• which four planets are rocky

  Mercury, Venus, Earth, and Mars
• Which four planets are gas giants

  Jupiter, saturn, Uranus, Neptune
• why are the 4 inner planets rocky and the 4 outer planets gas giants?

  The heavier, more dense material was held closer to the sun whilst the lighter material was pushed further away.
• Where does the asteroid belt lie?

  Between mars and jupiter
• What does the asteroid belt consist of?

  Rocky matter which did not form into planets
• What are day and night due to?

  The rotation of earth
• Why is it hotter at the equator than the northern hemisphere?

  At the Equator, the Sun lies directly overhead. At the poles, the Sun is lower in the sky. Places closer to the Equator are therefore hotter as the Sun’s rays are more concentrated. The movement of air evens out this difference in temperature. 
• What planet has the shortest year and why?

  Mercury. Smaller orbit around the sun and travels the fastest.
• what is the equation to change mass to weight on earth?

  Weight= Mass x 10
• 2 reasons why does Jupiter take longer to orbit the sun than mars?

  1. Longer path 2. Travels slower as the sun's gravitational pull on it's weaker