Global Systems gr10 - sci

what are the 3 parts of the biosphere

atmosphere, lithosphere, hydrosphere

what does earth being a “closed system” mean?

it exchanges energy with its surroundings, but it doesn’t exchange a lot of matter.

biosphere

is where life is found

parts of the atmosphere

exosphere

thermosphere

mesophere (middle)

stratosphere

troposphere

acronym: etmst

every tiny man sees tragedy

how much of each gas in atmosphere

78% nitrogen

22% oxygen

>1% other gases

what is atmospheric dust

soot, pollen, microorganisms

where has almost all of the atmospheric dust

troposphere

where in the biosphere contains almost all life

troposphere

where is the ozone layer

stratosphere

where is the hottest part of the atmosphere

thermosphere

what is the lithosphere

the solid part of the Earth. it is warmed by the Sun and the earth’s mantle

hydrosphere

the water portion of the earth

composition of the hydrosphere

97% saltwater (oceans and seas)

3% freshwater - mainly frozen in glaciers and continental ice sheets

recite the whole water cycle

okay… ☹

where does weather occur

troposphere

what is temperature

average kinetic energy in all atoms of a substance

insolation

the amount of sun rays that hit the earth

what determines insolation in an area

angle at which light strikes Earth’s surface

angle of incidence related to the Sun

angle between a ray (that hits the earth) and the line perpendicular to that surfce

at the equator, the angle of incidence is 0.

angle of incidence significance

the higher the angle of incidence, the greater area the same insolation will cover.

For example, nearer to the poles will get the same amount of solar energy as the equator, but it will be distributed more, while the solar energy for the equator is concentrated

Angle of inclination

degree of which the earth’s poles are tilted: ours is 23.5