ENERGY

• The Gravitational pull of the sun holds Earth and the rest of the planets in the Solar system in orbit.
• The Sun is the closest star to Earth.Th sun is also has a huge mass of hot,glowing gases.The sun is a star.Astronomers think that the sun is about 4.6 billion years old.
• The sun provides Earth with amounts of energy.The oceans and seas store the energy.Also help keep the temperature of Earth at level at allows life to exist.
• Plants use the Suns energy to make food.The Sun's energy also creates wind in the atmosphere.

ATMOSPHERE

• The Earth is surrounded by a blanket of air called atmosphere
• The atmosphere is made up of gases(nitrogen,oxygen,and carbon dioxide)that is a protective shield for Earth and allows life to happen.Without it,we would be burned by the sun or freeze at night.
• The atmosphere is held to the Earth by gravity.
• The atmosphere also produces clouds and rain and is also a influence on the climate.

CONDITIONS FOR LIFE

WATER & TEMPERATURE

• The Earth's climate is stable and this is because of the distance from the sun.As like its orbit around the sun.
• Water is the most important chemical for life to exist on Earth.Water doesn't burn the skin like other acidic liquids.Its drinkable and allows to be carried through the body.Some Moons also have water like Ganymede that has a saltwater ocean.
• Water Vapor is vital to weather and climate.

WHAT IS NECESSARY FOR life & ROTATION

• The length of time takes Earth to rotate on its axis is 24 hours.Each side of the planet gets sunlight,12 hours of sunlight and 12 hours of darkness.
• A non-poisonous atmosphere of gases that allows us to survive.
• The availability of liquid water for the use of plants,animals,and humans