Unit 2 test

Question 1

what is water made of

Answer 1

2 hydrogens and 1 oxegen

Question 2

what charge does a hydrogen atom have

Answer 2

positive

Question 3

what charge does an oxygen atom have

Answer 3

negative

Question 4

what allows water molecules to attract other water molecules

Answer 4

the charges

Question 5

what happens when a negative oxygen in one water molecule attracts a positive hydrogen in another water molecule

Answer 5

a hydrogen bond is formed

Question 6

what is it called when water is attracted to water

Answer 6

cohesion

Question 7

what is surface tension

Answer 7

a tightness across the surface of water that makes water skeeters able to walk on water

Question 8

what is it called when water is attracted to other objects

Answer 8

adhesion

Question 9

what is it called when water creeps up roots and stems

Answer 9

capillary action

Question 10

what is specific heat

Answer 10

the amount of heat needed to change water’s temp

Question 11

how much of earth is water

Answer 11

75%

Question 12

what is a solution made of

Answer 12

a solvent and a solute

Question 13

what is a molecule that can dissolve water called

Answer 13

hydrophilic

Question 14

what is a molecule that can’t dissolve water called

Answer 14

hydrophobic

Question 15

what is unique about water regarding it’s density

Answer 15

it’s less dense when it’s frozen

Question 16

what is the definition of organic

Answer 16

made of carbon

Question 17

what are the 4 major macromolecules

Answer 17

proteins, lipids, nucleic acids, carbohydrates

Question 18

what is a main funtion of carbs

Answer 18

stores quick energy

Question 19

what is a main function of lipids

Answer 19

stores long term energy

Question 20

what is a main funtion of protein

Answer 20

helps build muscle, fights disease, regulates cell funtions

Question 21

what is a polymer

Answer 21

a large molecule made of many smaller, repeating subunits called monomers

Question 22

what is the monomer for lipids

Answer 22

triglyceride (glycerol and 3 fatty acid chains)

Question 23

polysaccharide monomer

Answer 23

monosaccharide

Question 24

protein monomer

Answer 24

amino acid

Question 25

what macromolecule is glucose

Answer 25

carbs

Question 26

what macromolecule is sucrose

Answer 26

carb

Question 27

what macromolecule is fructose

Answer 27

carb

Question 28

what macromolecule is fats

Answer 28

lipids

Question 29

what macromolecule is steroids

Answer 29

lipids

Question 30

what macromolecule is oil

Answer 30

lipids

Question 31

what macromolecule is wax

Answer 31

lipids

Question 32

what macromolecule is cholesterol

Answer 32

lipids

Question 33

what macromolecule is amino acids

Answer 33

protiens

Question 34

what bonds link amino acids together

Answer 34

polymer

Question 35

what is the formula for glucose

Answer 35

C6H12O6

Question 36

why is the shape of a protein important

Answer 36

the shape determins the funtion

Question 37

what number on the ph scale is nuetral

Answer 37

7

Question 38

what numbers on the ph scale are acids

Answer 38

0-6.9

Question 39

what numbers on the ph scale is bases

Answer 39

7.1-14

Question 40

what represents acids

Answer 40

H+

Question 41

what represents bases

Answer 41

OH-

Question 42

what type of macromolecule is an enzyme

Answer 42

proteins

Question 43

what is the term for breaking/hurting an enzyme

Answer 43

denature

Question 43

what are enzymes/what do they do

Answer 43

catalysts/speed up the process

Question 44

how does denaturing happen

Answer 44

change in temp, ph, or adding activators or inhibitors

Question 45

define element

Answer 45

only made of one kind of atom and can't be broken down more

Question 46

what are the 6 basic elements of life

Answer 46

carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur

Question 47

how much human mass do the 6 basic elements of life take up

Answer 47

over 96%

Question 48

what is a compound

Answer 48

2+ atoms of 2+ elements

Question 49

whats and h-bond

Answer 49

incomplete bond w/ weak attraction

Question 50

what does a chemical formula do

Answer 50

tells type and number of atoms

Question 51

whats matter

Answer 51

anything that has mass and takes up space

Question 52

what are the perks of earth being 75% water

Answer 52

keeps temp stable, coastal mild climates, stable marine environment

Question 53

whats the abbreviation for carbohydrates

Answer 53

CHO1:2:1

Question 54

whats the abbreviation for lipids

Answer 54

CHO 1:2:<1

Question 55

whats the abbreviation for protiens

Answer 55

CHON

Question 56

whats the abbreviation for Nucleic acids

Answer 56

CHONP

Question 57

what are starch polysaccharides made of

Answer 57

glucose monosaccharides

Question 58

what molecule is H+

Answer 58

hydrogen

Question 59

what molecule is OH-

Answer 59

hydroxide

Question 60

what does a logarithmic scale mean

Answer 60

each step on the scale is 10x more or less

Question 61

do chemical reactions take place in all living things?

Answer 61

yes

Question 62

what are chemical reactions

Answer 62

charging one set of molecules to another

Question 63

what three letters do enzymes always end in

Answer 63

ase