Sun Moon and Stars

Gravity

• Gravity is the force of attraction between two objects
• Issac Newton discovered gravity
• In black holes gravity is so strong not even light can escape
• In some places there  is more or less gravity
• Pluto is the planet with less gravity

Gas Giants

• The gas giants are Jupiter, Venus, Uranus and Neptune
• They are made of gas
• They are inhabitable
• They don't have a surface
• They are cold because they are a long distance from the su

Rocky Planets

• They are Mercury, Venus, Earth and Mars
• They are made of rock
• They are smaller than the gas giants                 
• Mercury is the closest planet to the sun
• Mars maybe had life a long time ago

Kuiper Belt

• Its an asteroid belt 
• Some Ice on the Kuiper was formed when the solar system was formed
• Objects that orbit the Kuiper belt are mainly made of rock, ice, ammonia and methane.
• There is about two trillion comets in the kipper belt
• There are about 70,000 objects with a diameter over 100 kilometers

Asteroid Belt

• Objects there are made of rock
• we know of 7,000 asteroids
• Gravity can take asteroids out of the belt
• most of the asteroids are small
• Asteroids get their names by their discoverers suggestion

Satellites

• They orbit planets or the sun
• They are made of rock
• There moon is a satellite
• Some planets have more satellites than other planets
• They are planets or moons 

Evaporation

• Temperature makes water evaporate faster or slower
• When evaporation happens water turns into water vapor
• The evaporation goes into the air
• you can't see evaporation
• Evaporation is the change of water from liquid to gas

Surface Area

• Surface area is the area of water touching the air  
• Surface area affects evaporation
• the surface area is bigger water evaporates faster 
• If the surface area is smaller water evaporates slower

Condensation

• Condensation happens when water vapor gets on a cool surface 
• Water vapor is needed to get condensation
• One example of condensation is on your bathroom
• Condensation is the opposite of evaporation 
• continuos condensation can cause fungus