Unit 3

Question 1

_________ is the attractive force between two different types of molecules.

Answer 1

adhesion

Question 2

according to Archimedes’ principle, if the buoyancy of an object is _______ it will sink.

Answer 2

negative

Question 3

_________ bonds occur between different water molecules.

Answer 3

hydrogen

Question 4

______ is mass per unit of volume, or how much stuff is packed into a certain space.

Answer 4

density

Question 5

________ have a definite volume but not a definite shape.

Answer 5

liquids

Question 6

________ means to become fully incorporated into a liquid.

Answer 6

dissolve

Question 7

the process where matter in an area of high concentration moves to an area of low concentration is called _______.

Answer 7

diffusion

Question 8

salt _______ the boiling point of water.

Answer 8

raises

Question 9

____________ is the phase changing from a liquid to a gas

Answer 9

vaporization

Question 10

__________ is a measurement of the amount solids in a liquid based on how much light is scattered by the solid particles.

Answer 10

turbidity

Question 11

in order to float, an object needs to ________ as much as it weighs.

Answer 11

displace

Question 12

______ have a definite shape, volume, and structure

Answer 12

solids

Question 13

between 4C and 0C ________ bonds expand in water molecules.

Answer 13

hydrogen

Question 14

the settling of materials at the bottom of a liquid is ____________.

Answer 14

sedimentation

Question 15

minerals and elements that serve a vital function in living things are ________.

Answer 15

nutrients

Question 16

in order to avoid decompression sickness, a diver cannot change ________ _________ too quickly.

Answer 16

hydrostatic pressure

Question 17

a property of liquid that allows is to resist external forces is _________ ________.

Answer 17

surface tension

Question 18

_______ bonds occur between the hydrogen and oxygen in the water molecule

Answer 18

covalent

Question 19

_________ only occurs on the surface of the liquid

Answer 19

evaporation

Question 20

when two or more things work together to produce a greater impact, positive or negative, then either would by itself is _______

Answer 20

synergy

Question 21

________ is the attractive force between two or more of the same molecules

Answer 21

cohesion

Question 22

_______ is the upward force that acts on every object that is at least partially submerged in water

Answer 22

buoyancy

Question 23

_______ occurs anywhere in the liquid

Answer 23

boiling

Question 24

too many _______ can cause methemoglobin which causes “blue baby syndrome”

Answer 24

nitrites

Question 25

ice is held together in what structures?

Answer 25

hexagonal

Question 26

what is an atom versus a molecule?

Answer 26

an atom is indivisible and the building block of matter. a molecule is two or more atoms chemically combined.

Question 27

which has more dissolved oxygen, warm or cold water?

Answer 27

cold because less movement means it's less likely to break free

Question 28

why is fecal coliform in water measured separately from other suspended solids?

Answer 28

it has a potential for pollution and diseases

Question 29

if water behaved like other molecules of similar weight, what kind of planet would Earth be?

Answer 29

gas

Question 30

what is the difference between total dissolved solids and total suspended solids?

Answer 30

TDS are a measurement of the total amount of solids dissolved in a liquid that can pass through a 2-micron filter. TSS are a measurement of the total amount of solids in a liquid that can't pass through a 2-micron filter