ppt
What is a refractometer used for?
the salinity of a water sample
What would you call a river that is brown due to runoff of sediment?
High turbidity
Name the only know substance that can exist in all three states of matter.
water
Which phase of water do molecules move the quickest?
gas
what does ppt stand for
parts per thousand
Average salinity of the ocean
35ppt
Why does ice float in liquid water?
Its less dense
What phase of water do molecules only vibrate?
Solid
symbol for ppt
%o
Name one freshwater output (an action that would increase salinity)
evaporation
ice freezing
Which is more dense hot or cold water?
cold
high
Which has a higher salinity: 1000mL of water with 50g of salt or 500mL of water with 50g of salt?
500mL of water with 50g of salt
Name one freshwater input (decreases salinity)
rain
melting ice
glacier melting
Where does a hydrogen bond exist in water?
between water molecules
Calculate the salinity of 1000mL of water with 3.5g of salt
3.5ppt
Calculate the mass of salt (in grams) needed to reach 35ppt in 500mL of water
17.5 g
What general location in Earth's oceans have the lowest salinities?
polar
A water molecule is held together by what type of bond?
covalent bonds
Why are salinities lower right along the equator?
because there is so much evaporation that it creates large amounts of precipitation, which lowers the salinity