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biology 201 > bio lab test 1 > Flashcards

bio lab test 1 Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

Caused by surface tension and adhesion

A

Meniscus

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2
Q

The space occupied by an object

A

Volume

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3
Q

Basic unit of length

A

meter

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4
Q

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

A

1) Median

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5
Q

1) Number of grams in a kilogram

A

1) 1000

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6
Q

1) Mass/Volume=???

A

1) Density

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7
Q

1) Convert 0.0987 liter into milliliters

A

1) 98.7 ml

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8
Q

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

A

1) Kilogram

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9
Q

1) Write the following formulas

a. Converting Fahrenheit to Celcius
b. Density

A

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

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10
Q

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

A

1) 9

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11
Q

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

A

1) 10, 20, 30

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

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12
Q

refers to sal in a salt and water mixture

A

solute molecule

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13
Q

limits changes in pH

A

buffer

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14
Q

concentrated form of a chemical

A

stock solution

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15
Q

as pH decreases, its H+ concentration increases

A

true

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16
Q

difference of acidity between pH levels

A

10 times

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17
Q

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

A

true

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18
Q

buffers absorb excess H+ as the pH increases

A

false

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19
Q

mole

A

standard measurement of amount of a chemical. 6.02e23 molecules

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20
Q

molecular weight

A

weight of molecule in grams

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21
Q

solution

A

mix of solute and solvent

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22
Q

solute

A

something (like salt) that is dissolved in something else

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23
Q

solvent

A

what a solute is dissolved in

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24
Q

stock solution

A

concentrated form of a solution

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25
Q

dilution

A

diluting a solution with water to reach a desired molarity

26
Q

pH scale

A

scale to measure acidity

27
Q

pH paper

A

chemically treated paper that changes color to show pH

28
Q

buffers

A

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

29
Q

dependent variable

A

y-axis

30
Q

independent variable

A

x-axis

31
Q

hydrophilic molecule

A

water loving molecule, polar

32
Q

hydrophobic molecule

A

water fearing, non polar

33
Q

amphipatic molecule

A

has both water fearing and water loving regions

34
Q

fluid mosaic model

A

membrane with proteins scattered through it, made of carbohydrate chains

35
Q

betacyanin

A

reddish pigment located in central vacuole

36
Q

tonoplast

A

vacuolar membrane

37
Q

fluid mosaic model describes chem structure of betacyanin

A

false

38
Q

vacuolar membrane is called the tonoplast

A

true

39
Q

beet core samples must be rinsed to use

A

true

40
Q

fingerprints on testubes decrease absorbance values

A

false

41
Q

more transmittance=less betacyanin

A

true

42
Q

meter

A

basic unit of length

43
Q

metric system

A

common measurement system used in the world

44
Q

liter

A

basic unit of volume

45
Q

kilogram

A

basic unit of mass

46
Q

degrees celcius

A

basic unit of temperature

47
Q

kilo

A

multiple of 1000

48
Q

centi

A

0.01

49
Q

milli

A

0.001

50
Q

micro

A

0.000001

51
Q

nano

A

0.000000001

52
Q

what is statistics

A

way to organize, summarize and describe data

53
Q

what is range

A

difference between the extreme measurements of a sample

54
Q

advantages/disadvantages of the metric system

A

common, easy to convert/prefixes

55
Q

why are standard measures important in science

A

so that data can easily be shared and studied

56
Q

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

A

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

57
Q

repeated measurements, small or large range

A

small range

58
Q

mag. total=

A

mag. objective lens+mag ocular lens

59
Q

field of view

A

π x radius(squared)

60
Q

calculate field of vision already knowing 1

A

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

biology 201 (5 decks)

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