chap 3

Question 1

what is matter?

Answer 1

anything that takes up space & has mass

Question 2

what are molecules?

Answer 2

atoms bonded together chemically

Question 3

what are atoms?

Answer 3

the smallest unit an element can occur

Question 4

what are the three states of matter & the processes that change a substance from one state to another?

Answer 4

solid , liquid , gas. liquid is water at room temperature , solid is water at below freezing temperatures, and gas is formed when molecules are heated up and broken

Question 5

what is special about a water molecule?

Answer 5

h2o is a light molecule and is liquid at room temp while other molecules are gas at room temp

Question 6

what about waters density , heat capacity , latent heats, and properties as a solvent?

Answer 6

ice is less dense then liquid water , because the molecules take up more space when in a solid crystal form (ice floats in water). water has one of the highest heat capacities (the molecules are hard to break). ice absorbs lots of heat as it melts (w high temps)

Question 7

what is salinity

Answer 7

how salty water is (ppt)

Question 8

what’s the average salinity of the ocean?

Answer 8

35 ppt

Question 9

what is the rule of constant proportions?

Answer 9

the proportions of all the different solutes in sea water remain constant no matter the total salinity. while the ratio of NaCl may change , the ratio between the two will stay the same

Question 10

what are the two most common ions in water?