Entrance exam

• Planet


  Wanderer (from Greek)
• Planets


  • Round and opaque celestial bodies that revolve around the sun in a fixed orbit
  • Rotate around their own axis
  • Revolve around the sun
  • Not self-luminous like stars
• Criteria for a celestial object to be called a planet (according to IAU)

  • In orbit around the Sun
  • Sufficient mass to assume hydrostatic equilibrium (a nearly round shape)
  • Cleared the neighborhood around its orbit
• Pluto meets only two of the IAU criteria for being a planet

  doesn't meet "clears neighboring region"
• Clearing the neighborhood


  The planet has become gravitationally dominant - there are no other bodies of comparable size other than its own satellites or those otherwise under its gravitational influence, in its vicinity in space
• Pluto is technically a dwarf planet and is classified differently than the major planets
• The eight planets in the solar system

  • Mercury
  • Venus
  • Earth
  • Mars
  • Jupiter
  • Saturn
  • Uranus
  • Neptune
• Mercury


  • Closest planet to the Sun
  • Smallest planet
  • Made of rock
  • Takes 88 days to complete its orbit
  • Much hotter than Earth
• Venus


  • Next planet from the Sun after Mercury
  • Made of rock
  • Has a thick atmosphere
  • Permanently covered in clouds
  • Hottest planet with an average temperature of 460°C
  • About the same size as Earth
  • Takes 225 days to travel around the Sun
• Earth


  • Where we live
  • Made of rock
  • Only planet where water is liquid
  • Takes 365 days to travel around the Sun
• Mars


  • A little smaller than Earth
  • Further out from the Sun
  • Used to have an atmosphere like Earth and Venus, but doesn't have much anymore
  • Reddish in colour, sometimes called 'The Red Planet'
  • Takes 687 days to complete its orbit of the Sun
  • Average temperature of -63°C
• Jupiter


  • Largest planet in the Solar System
  • You could fit 1,321 Earths inside Jupiter
  • Made of gas, one of the four 'gas giants'
  • Has 66 moons, one of them (Ganymede) is bigger than Mercury
  • Five times as far from the Sun as the Earth is
  • Takes almost 12 years to travel around the Sun
• Saturn


  • Famous for its rings
  • Rings were first observed in 1610 by Galileo
  • Rings are made up of huge numbers of small lumps of ice and dust
  • Second largest planet in the Solar System
  • Another 'gas giant' like Jupiter
  • Takes 29.5 years to travel around the Sun
• Uranus


  • Another 'gas giant'
  • You could fit 63 planets the size of Earth inside Uranus
  • Takes 84 years to orbit the Sun
  • Coldest planet, with an average temperature of -220°C
• Neptune


  • Farthest planet from the Sun
  • 30 times as far from the sun as Earth
  • Takes 165 years to travel around the Sun
  • Last of the four 'gas giants'
  • 58 times the volume of Earth
• pressure release


  exfoliation
• snow


  highest albedo
• mars


  has pink sky
• my very excellent mother just served us noodles

  mercury, venus, earth, mars, jupiter, saturn, uranus, neptune
• venus and mercury


  no moon
• mercury


  no atmosphere
• venus


  hottest planet because of thick atmosphere
• mars


  have pink sky
• jupiter


  has gian red spot na damo storm
• saturn


  only has rings
• uranus


  90 degrees tilt
• 1321 earth


  how many earth in jupiter
• Planet


  Celestial body that revolves around the sun in a fixed orbit
• Planets


  • Round and opaque
  • Rotate around their own axis
  • Revolve around the sun
  • Not self-luminous like stars
• According to the International Astronomical Union (IAU), a celestial object is called a planet if:
• Pluto is technically a dwarf planet and is classified differently than the major planets
• *Transmission*


  The passage of light through a medium, such as air, water, or glass, without being absorbed or deflected.
• Reflection


  The change in direction of light when it bounces back from a surface, without passing through the medium.
• Refraction


  The bending of light as it passes from one medium to another, due to a change in speed.
• Diffraction


  The bending of light around an obstacle or through a small opening, creating an interference pattern.
• Absorption*


  The absorption of light by a medium, converting it into other forms of energy, such as heat.
• Scattering


  The random redirection of light by interactions with particles or irregularities in a medium, like Rayleigh scattering in the atmosphere.
• densest planet in solar system - earth
• type 1


  inability to produce insulin
• perihelion


  planet's orbit closest to the sun