bio lab test 1

Question 1

Caused by surface tension and adhesion

Answer 1

Meniscus

Question 2

The space occupied by an object

Answer 2

Volume

Question 3

Basic unit of length

Answer 3

meter

Question 4

1) The middle value in a group of numbers arranged in a row from lowest to highest

Answer 4

1) Median

Question 5

1) Number of grams in a kilogram

Answer 5

1) 1000

Question 6

1) Mass/Volume=???

Answer 6

1) Density

Question 7

1) Convert 0.0987 liter into milliliters

Answer 7

1) 98.7 ml

Question 8

1) What is the basic unit of mass in the metric system

Answer 8

1) Kilogram

Question 9

1) Write the following formulas

a. Converting Fahrenheit to Celcius
b. Density

Answer 9

1) Formula
a. F=(9/5)C+32
b. D=Mass/Volume

Question 10

1) If the standard deviation is 3, what is the variance

Answer 10

1) 9

Question 11

1) Use any three numbers (below 50) to show that median and mean can sometimes be the same value for a given group of numbers

a. What is median
b. What is mean

Answer 11

1) 10, 20, 30

a. Middle value in group
b. Average of a group of #

Question 12

refers to sal in a salt and water mixture

Answer 12

solute molecule

Question 13

limits changes in pH

Answer 13

buffer

Question 14

concentrated form of a chemical

Answer 14

stock solution

Question 15

as pH decreases, its H+ concentration increases

Answer 15

true

Question 16

difference of acidity between pH levels

Answer 16

10 times

Question 17

mole of substance A and a mole of substance B consist of the number of molecule

Answer 17

true

Question 18

buffers absorb excess H+ as the pH increases

Answer 18

false

Question 19

mole

Answer 19

standard measurement of amount of a chemical. 6.02e23 molecules

Question 20

molecular weight

Answer 20

weight of molecule in grams

Question 21

solution

Answer 21

mix of solute and solvent

Question 22

solute

Answer 22

something (like salt) that is dissolved in something else

Question 23

solvent

Answer 23

what a solute is dissolved in

Question 24

stock solution

Answer 24

concentrated form of a solution

Question 25

dilution

Answer 25

diluting a solution with water to reach a desired molarity

Question 26

pH scale

Answer 26

scale to measure acidity

Question 27

pH paper

Answer 27

chemically treated paper that changes color to show pH

Question 28

buffers

Answer 28

mixture of a weak acid or base that helps maintains the pH constant

Question 29

dependent variable

Answer 29

y-axis

Question 30

independent variable

Answer 30

x-axis

Question 31

hydrophilic molecule

Answer 31

water loving molecule, polar

Question 32

hydrophobic molecule

Answer 32

water fearing, non polar

Question 33

amphipatic molecule

Answer 33

has both water fearing and water loving regions

Question 34

fluid mosaic model

Answer 34

membrane with proteins scattered through it, made of carbohydrate chains

Question 35

betacyanin

Answer 35

reddish pigment located in central vacuole

Question 36

tonoplast

Answer 36

vacuolar membrane

Question 37

fluid mosaic model describes chem structure of betacyanin

Answer 37

false

Question 38

vacuolar membrane is called the tonoplast

Answer 38

true

Question 39

beet core samples must be rinsed to use

Answer 39

true

Question 40

fingerprints on testubes decrease absorbance values

Answer 40

false

Question 41

more transmittance=less betacyanin

Answer 41

true

Question 42

meter

Answer 42

basic unit of length

Question 43

metric system

Answer 43

common measurement system used in the world

Question 44

liter

Answer 44

basic unit of volume

Question 45

kilogram

Answer 45

basic unit of mass

Question 46

degrees celcius

Answer 46

basic unit of temperature

Question 47

kilo

Answer 47

multiple of 1000

Question 48

centi

Answer 48

0.01

Question 49

milli

Answer 49

0.001

Question 50

micro

Answer 50

0.000001

Question 51

nano

Answer 51

0.000000001

Question 52

what is statistics

Answer 52

way to organize, summarize and describe data

Question 53

what is range

Answer 53

difference between the extreme measurements of a sample

Question 54

advantages/disadvantages of the metric system

Answer 54

common, easy to convert/prefixes

Question 55

why are standard measures important in science

Answer 55

so that data can easily be shared and studied

Question 56

gain or lose info when using statistics to reduce the population to a few numbers

Answer 56

gain knowledge of the whole but lose knowledge of each specific part

Question 57

repeated measurements, small or large range

Answer 57

small range

Question 58

mag. total=

Answer 58

mag. objective lens+mag ocular lens

Question 59

field of view

Answer 59

π x radius(squared)

Question 60

calculate field of vision already knowing 1

Answer 60

FOV(low) x Mag(low)= FOV(high) x Mag(high)