Earth's system
Is the Earth a system?
Yes
What is the Earth's atmosphere?
A layer of gases that surrounds the planet, held in place by gravity
What is the hydrosphere?
It includes water on the Earth's surface and the water underground. Water is present in all 3 states.
It is almost a perfect sphere, it has a radius of 6371km, has 3 concentric layers
Define system.
Name 2 functions of the atmosphere.
It contains essential gases, protects the Earth (or regulates temperature)
Name 3 places where is water present.
The clouds, present in living beings, rivers, torrents, lagoons, lakes, groundwater, frozen water
Name the 3 layers
Crust, Mantle, Nucleus
How many layers does the Earth have?
4.
What is the composition?
Nitrogen, oxygen, carbon dioxide, water vapour and other gases
Why is water important? Give 3 reasons.
Dissolves many substances
Regulates temperatures
Plays a role in processes
It supports life
What are minerals?
Natural substances that are solid. They have a specific chemical composition and crystalline structure.
Name the Earth's 4 layers.
Biosphere, Geosphere, Hydrosphere, Atmosphere
Can you list the percentages for the gases?
Nitrogen - 78%
Oxygen - 21%
Carbon Dioxide - 0.033%
Water vapour and other gases - 0.67%
What are the percentages of the water states?
Water in living beings - 0.0007%
Water in the clouds - 0.001%
Surface water, rivers, etc - 0.02%
Groundwater - 0.7%
Frozen water - 1.75%
What is a crystalline structure?
A mineral's atoms arranged in a regular repeating pattern.