quiz 1

Question 1

stout glass cylinder with a beak

Answer 1

beaker

Question 2

stereotypical “science” flask, cone-shaped bottom with cylindrical top

Answer 2

erlenmeyer flask

Question 3

long scoop with a pointed end, usually metal

Answer 3

scoopula

Question 4

tall, narrow cylinder with beak

Answer 4

graduated cylinder

Question 5

safety-pin like end with tongs that cross to fit shape of test tube

Answer 5

test tube holder

Question 6

container with top

Answer 6

crucible

Question 7

tongs with slots for fingers at top, tongs cross with seagull-shaped waves

Answer 7

crucible tongs

Question 8

stand for placing something on with clamp that provides additional surface

Answer 8

stand and ring clamp

Question 9

basically tweezers

Answer 9

forceps

Question 10

dropper with squeezable top

Answer 10

dropper pipet

Question 11

most fucked up looking clamp, the part that attaches to the stand has a c shape w a screw going thru and then test tube shaped tongs on the other end

Answer 11

utility clamp

Question 12

key-shape (smooth edges) with barbell attached to it

Answer 12

pinch clamp

Question 13

symmetrical clamp meant to hold a tube in its center

Answer 13

buret clamp

Question 14

deep bowl-shaped glass

Answer 14

evaporating dish

Question 15

shallow bowl-shaped glass, like a contact

Answer 15

watch glass

Question 16

long rubber or plastic scraper

Answer 16

rubber policeman

Question 17

dec places/sig figs in calculations

Answer 17

for add/sub, take the lowest # of DP in the equation and round the answer to have that # of DP
for mult/div, take the lowest # of SF in the equation and round the answer to have that # of SF

Question 18

when solving complex equations with sig figs/dec places

Answer 18

use the extra sig figs/dec places and only consider their intended sig fig/dec place in the end

Question 19

what is a significant figure

Answer 19

nonzero digits, interior zeroes, trailing zeroes to the right of a decimal (ex 4.0)

Question 20

what isn’t a significant figure

Answer 20

leading zeroes (to the left of a first nonzero digit, ex the “.00” in “.004”), trailing zeroes before an implied decimal point (ex the “00” in 1200)

Question 21

number of dec places you must report when measuring…

Answer 21

1/10 of the smallest marked increment of measurement, AKA one digit further to the right
ex: if the smallest increment is 1 mL, you report to the 0.1 mL

Question 22

order of magnitude

Answer 22

the exponent in scientific notation.

ex: 10^3 has OoM of 3, so two notations that both have 10^3 have the same OoM. 10^3 and 10^5 have a difference of 2 OoM

Question 23

scientific notation

Answer 23

A digit (probably followed by a decimal point and some other digits, depending on the req # of sig figs) x 10-to-a-power.
ex: 4 x 10^0 (=4), 9.6 x 10^1 (=96), 3.045 x 10^2 (=304.5), 2.1 x 10^(-1) (=.21)

Question 24

to find/calculate sci notation,

Answer 24

when 10^a, move the decimal “a” digits to the right.

when 10^(-a), move the decimal “a” digits to the left.

Question 25

laws vs theories

Answer 25

a law is a brief statement that summarizes past observations and predicts future ones, while a theory is a broader, deeper explanation for observations and laws. it is a model of the way nature is and often predicts behavior that extends beyond observations and laws

Question 26

observations

Answer 26

measurement of some aspect of nature.

Question 27

scientific method

Answer 27

a self-correcting process composed of observation, hypotheses, testing hypotheses with an experiment, and formulating laws and theories

Question 28

hypothesis

Answer 28

tentative interpretation or explanation of observations. a good one is falsifiable, meaning it is able to be proven wrong

Question 29

experiment

Answer 29

a highly controlled observation designed to validate or invalidate a hypothesis

Question 30

wire triangle with clay on it

Answer 30

clay triangle

Question 31

screen of wire

Answer 31

wire screen