Lecture Week 1-2 Flashcards
1
Q
% of water in Earth
A
71%, 2% freshwater
2
Q
Form of freshwater
A
Precipitation, Stream, Mountains, Lakes, Groundwater
3
Q
We explored ho many % of the Ocean
A
5%
4
Q
PAIA
A
Pacific Atlantic India Arctic
5
Q
Sea
A
Ocean that is partly enclosed by land; maintains connection to the world ocean
6
Q
Salinity
A
Amount of dissolved solids (Salt) in water
7
Q
Salinity is measured in
A
parts per mil %o
8
Q
Avg. Salinity of sea water
A
35%
9
Q
Avg. Salinity of a fresh water
A
< .05%
10
Q
Dead sea’s salinity
A
300-400%o
11
Q
Earth’s age
A
4.6 billion years old
12
Q
Solar System’s Age
A
13-15 Billion years
13
Q
Ages are found through
A
Elements (Radioactive Decay) Brightness of a star Galaxies and Redshift Earth's surface Meteorites
14
Q
Nebular Hypothesis
A
Explains the origin of our solar system
Super Nova explodes + Collapses = Nebula
15
Q
Nebula is
A
Cloud of gas + dust
