Exam 1

Question 1

Cohesion, surface tension, and adhesion are the properties of water molecules that _________

Answer 1

are a result of hydrogen bonding

Question 2

Why does ice float in liquid water?

Answer 2

stable hydrogen bonds keep water molecules o face farther apart than water molecules of liquid water

Question 3

Hydrophobic substances such as vegetable oil are _________.

Answer 3

nonpolar substances that repel water molecules

Question 4

_________ energy is the energy of motion

Answer 4

kinetic

Question 5

Which of the following is a hydrophobic material

Answer 5

wax

Question 6

The kind and number of bonds an atom can form depends on ___________.

Answer 6

the number of particles in its nucleus

Question 7

In a single molecules of water, two hydrogen atoms are bonded to a single oxygen atom by _______.

Answer 7

polar covalent bonds

Question 8

Which of the following statements is true about buffer solutions?

Answer 8

they maintain a relatively constant pH when either acids or bases are added to them

Question 9

_____________ are two atoms of an element that differ in number of neutrons

Answer 9

isotopes

Question 10

A __________ bond forms when a hydrogen atom covalently bonded to one electronegative atom is also attracted to another electronegative atom

Answer 10

hydrogen bond

Question 11

____________ are ranged into specific energy levels called shells

Answer 11

electrons

Question 12

A pH measurement of 13.52 would be considered ________

Answer 12

basic

Question 13

A _______ is the amount of heat energy to raise the temperature of one gram of water

Answer 13

calorie

Question 14

To understand the chemical basis of inheritance, we must understand the molecular structure of DNA. This is an example of the application of which concept to the study of biology?

Answer 14

reductionism

Question 15

What’s the order of biological hierarchy?

Answer 15

1. biosphere
2. ecosystem
3. community
4. population
5. organism

Question 16

plants convert __________-

Answer 16

sunlight to chemical energy

Question 17

Which branch of biology is concerned with the naming and classifying of organisms?

Answer 17

taxonomy

Question 18

the partial negative charge at one end of a water molecule is attracted to the partial positive charge of another water molecule. What is this attraction called?

Answer 18

hydrogen bond

Question 19

liquid water ____________.

A.) is less dense than ice

B.) has a specific heat lower than that of most other substances

C.) has a heat of vaporization higher than that of most other substances

D.) is non-polar

Answer 19

has a heat of vaporization higher than that of most other substances

Question 20

Rank, from low to high, the pH of blood, stomach acid, and urine

Answer 20

1. stomach acid
2. urine
3. blood

Question 21

carbon dioxide in the atmosphere dissolves with the raindrops. The pH of raindrops is ______

Answer 21

slightly acidic

Question 22

Acid solutions have pH values ___________ 7.0

Answer 22

less than

Question 23

Which of these provides evidence of the common ancestry of all life?

Answer 23

near universality of the genetic code

Question 24

A controlled experiment _____________.

Answer 24

includes at least two groups, one of which does not receive the experimental treatment

Question 25

Van der Waals interactions may result when _______.

Answer 25

electrons are not symmetrically distributed in a molecule

Question 26

The atomic number refers to the ___________.

Answer 26

number of protons in an atom

Question 27

the atomic mass of an atom is determined by the combined masses of its ___________

Answer 27

neutrons and protons

Question 28

the lowest level of biological organization consists of ______________.

Answer 28

subatomic particles

Question 29

___________ cells are the most complex type of cell

Answer 29

Eukaryotic cells

Question 30

__________ logic uses observations and facts to arrive at generalization for hypotheses

Answer 30

inductive

Question 31

__________ is the acquisition of traits by way of transmission of DNA from parent to offspring

Answer 31

inheritance

Question 32

___________ donate H+ when dissolved in water

Answer 32

acids

Question 33

The least inclusive of the taxonomic categories listed here is A.) family B.) phylum C.) genus D.) order

Answer 33

genus

Question 34

What are four common states of matter?

Answer 34

1. liquid 2. gas 3. solid 4. plasma

Question 35

__________ properties are measured or observed without changing the identity of the substances or matter in the object

Answer 35

physical

Question 36

An _________ is a substance that cannot be broken down to other substances by chemical reactions

Answer 36

element

Question 37

A ________ is a stable suspension of fine particles in a liquid

Answer 37

colloid

Question 38

An ________ solution is one ion which water is the solvent

Answer 38

aqueous

Question 39

A _______ is a positively charged ion

Answer 39

cation

Question 40

List the three multicellular kingdoms that are contained in the domain Eukarya

Answer 40

1. Plantae 2. Fungi 3. Animalia

Question 41

List the two types of data

Answer 41

1. Qualitative 2. Quantitative

Question 42

List three common characteristics shared by all living organisms

Answer 42

1. growth and development 2. reproduce 3. energy processing

Question 43

List the three domains of life

Answer 43

1. Eukarya 2. Bacteria 3. Archaea

Question 44

List the four properties of water

Answer 44

1. cohesive behavior 2. expansion upon freezing 3. moderate temperature 4. versatilely of a solute

Question 45

_________ refers to rain, snow, or fog with a pH lower than 5.6

Answer 45

acid precipitation

Question 46

List the three subatomic particles that are common in many atoms

Answer 46

1. electron 2. proton 3. neutron

Question 47

_________ is the transformation of a substance from liquid to gas

Answer 47

evaporation

Question 48

_________ are representations of natural phenomena and can take the form of diagrams and mathematical equations

Answer 48

models

Question 49

________ electrons are those electrons found in the outermost shell of an atom

Answer 49

valence

Question 50

________ measures the intensity of heat due to the average kinetic energy of molecules

Answer 50

temperature

Question 51

the structure and ______ of living organisms are closely related

Answer 51

function

Question 52

water reaches its greatest density at _____C

Answer 52

4

Question 53

The word ______ is derived from Latin and means "to know"

Answer 53

science

Question 54

___________ is the scientific study of life

Answer 54

biology

Question 55

________ is the chemical conversion of nutrient molecules (food) into useable energy and building materials

Answer 55

metabolism

Question 56

energy flows through an ecosystem, usually entering as _________ and exiting as ___________

Answer 56

Light and heat

Question 57

A hypothesis must be ________ and potentially _________

Answer 57

testable and falsifiable

Question 58

____________ properties are observed when changes occur in the identity of the matter in a substance

Answer 58

chemical

Question 59

___________ energy is the energy that matter has because of its location or structure

Answer 59

potential

Question 60

the final molecules of a chemical reaction are called _________

Answer 60

products

Question 61

___________ is the biological medium on Earth

Answer 61

water