Our Habitable Earth: What conditions allow Earth to support and maintain life?
Conditions that allow Earth to support and maintain life:
1.2.
3.4.
5.
Sun
The Earth resides in the ______of our nearest star…______!
Habitable zone is the region around a star where it is possible for a planet with the correct atmospheric pressure to maintain ______on its surface
The sun provides the ______to provide all producers (autotroph) the ability to create their own food through ______.
The earth is tilted at an angle, as it revolves around the sun the earth is tilted towards or away from the direct rays of the sun- this is what gives us ______.
______on Earth allows for life.
Atmosphere
The atmosphere is like a blanket around the Earth. It is made up of ______, ______, 0.9 % argon, 0.03% carbon dioxide and trace amounts of other gasses.
The atmosphere does two main things:
- It absorbs energy from ______
- It recycles ______and other chemicals
Gravity
The ______is held in place due to gravity.
The gravitational pull of an object is due to the ______of the object.
Magnetosphere
A complex, invisible region that surrounds Earth.
The magnetosphere protects us from Solar Winds and Storms, which occur when highly energized particles are ejected from the sun.
The magnetosphere is formed by the motion of the ______in the core of the Earth.
The magnetosphere is responsible for the ______that allows us to use compasses and forms the magnetic North and South Poles.
Water
The hydrosphere is composed of all of ______.
This includes the oceans, rivers, lakes, and even ______.
______of the Earth’s water is in the oceans.
The remaining 3% is ______; ¾ of the fresh water is solid and exists in ice sheets/glaciers.
Water on other Worlds
______has defined polar regions that contain water ice.
______(6th moon of Jupiter) has a global salt water ocean covered in a thick, ice shell.