quiz 1

Question 1

fact

Answer 1

statements about the way we think things are, are changeable, are known through expirements observations or inferences

Question 2

truth

Answer 2

the way things really are , is true in all times and all places, never changes, is known through direct observation, valid reasoning, or divine revelation

Question 3

what type of knowledge does science use

Answer 3

facts

Question 4

theory

Answer 4

a mental model or representation that accounts for scientific facts in an orginized way

Question 5

hypothesis

Answer 5

a positively stated, informed prediction, based on a theory

Question 6

expirement

Answer 6

a controlled test of the hypothesis, which isolates, tests, and measures the relationship between 2 or more variables by manipulating one and measuring the effect on the other

Question 7

analysis

Answer 7

drawing conclusions based on the results of the expirement, deciding if it is consistent or inconsistent with the theory

Question 8

where does the cycle of scientific enterprise typically start today

Answer 8

theory

Question 9

magnification

Answer 9

how big something is

Question 10

resolution

Answer 10

how clear something appears

Question 11

can a living thing be smaller than a cell

Answer 11

no

Question 12

what single word distinguishes non-living things from living things

Answer 12

purpose

Question 13

what is the first characteristic of living things

Answer 13

composed of cells and opperate on many levels of organization

Question 14

cell

Answer 14

a self-contained living factory surrounded by a membrane, containing genetic materials, capable of self replication and keeping itself alive by cycling matter and energy

Question 15

levels of organization

Answer 15

atom, molecule, biomolecule, organelle, cell, tissue, organ, organism, population, community, ecosystem, biosphere

Question 16

range of magnification on a light microscope

Answer 16

40x-1000x

Question 17

degree of resolution on a light microscope

Answer 17

200nm

Question 18

types of things observed with a light microscope

Answer 18

thin slices of objects, 2D view limited detail, the thicker = more distorted

Question 19

advantages of a light microscope

Answer 19

low cost and simple (living and dead)

Question 20

range of magnification on a SEM

Answer 20

100,000x depending on size of beam

Question 21

degree of resolution on a SEM

Answer 21

2nm

Question 22

resulting image of a SEM

Answer 22

3D view

Question 23

disadvantages of a SEM

Answer 23

specimine must be dead dry and extremely thin

Question 24

degree of resolution of a TEM

Answer 24

smaller than 2nm

Question 25

what is observed with a TEM

Answer 25

inner organelles, 2D

Question 26

advantages of a TEM

Answer 26

greater magnification and resolution

Question 27

disadvantages of a TEM

Answer 27

specimine must dead dry and extremely thin