Lecture Week 1-2

Question 1

% of water in Earth

Answer 1

71%, 2% freshwater

Question 2

Form of freshwater

Answer 2

Precipitation, Stream, Mountains, Lakes, Groundwater

Question 3

We explored ho many % of the Ocean

Answer 3

5%

Question 4

PAIA

Answer 4

Pacific Atlantic India Arctic

Question 5

Sea

Answer 5

Ocean that is partly enclosed by land; maintains connection to the world ocean

Question 6

Salinity

Answer 6

Amount of dissolved solids (Salt) in water

Question 7

Salinity is measured in

Answer 7

parts per mil %o

Question 8

Avg. Salinity of sea water

Answer 8

35%

Question 9

Avg. Salinity of a fresh water

Answer 9

< .05%

Question 10

Dead sea’s salinity

Answer 10

300-400%o

Question 11

Earth’s age

Answer 11

4.6 billion years old

Question 12

Solar System’s Age

Answer 12

13-15 Billion years

Question 13

Ages are found through

Answer 13

Elements (Radioactive Decay)
Brightness of a star
Galaxies and Redshift
Earth's surface
Meteorites

Question 14

Nebular Hypothesis

Answer 14

Explains the origin of our solar system

Super Nova explodes + Collapses = Nebula

Question 15

Nebula is

Answer 15

Cloud of gas + dust

Question 16

Nebula dust collides and accretes

Answer 16

Proto Planets

Question 17

Protoplanets

Answer 17

Collide and form planets; Large, Hot, Dense sun in the center