Aweather map is an example of a
a.
hypothesis.
b.
manipulated variable.
c.
model.
d.
scientific theory.

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

Can someone i have no idea of how to do this.

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures