chapter 2.2: units of measurement

Question 1

the __ _____ ______ is used by scientists all over the world

Answer 1

SI Metric System

Question 2

advantages of the SI metric system:

Answer 2

units are multiples of 10; it’s used all around the world; prefixes are common throughout the system

Question 3

prefixes (commonly used in chem):

Answer 3

kilo(k); deci(d); centi(c); milli(m); micro(u); nano(n)

Question 4

kilo(k):

Answer 4

1000 (1km=1000m)

Question 5

deci(d):

Answer 5

1/10 (10dm=1m)

Question 6

centi(c):

Answer 6

100 (100cm=1m)

Question 7

milli(m):

Answer 7

1/1000 (1000mm=1m)

Question 8

micro(u):

Answer 8

1/1,000,000 (1,000,000u=1m)

Question 9

nano(n):

Answer 9

1/1,000,000,000 (1,000,000,000nm=1m)

Question 10

SI units:

Answer 10

length; volume; mass; density; temperature

Question 11

length:

Answer 11

meter(m)

Question 12

volume:

Answer 12

the amt. of space something takes up (cubic meter m^3 or the non SI unit, the liter (L))

Question 13

the volume of a cube that is 10cm on each side:

Answer 13

1L

Question 14

1L=

Answer 14

1000cm^3

Question 15

1mL=

Answer 15

1cm^3

Question 16

1m^3=

Answer 16

1000L

Question 17

mass:

Answer 17

the amt. of matter in an object (kilogram)

Question 18

density:

Answer 18

the ratio of mass of an object to its volume (units vary depending on the units used for mass/volume) [density=mass/volume d=m/v]

Question 19

temperature:

Answer 19

degrees Celcius or Kelvin

Question 20

celcius scale:

Answer 20

water freezes at 0C; water boils at 100C

Question 21

kelvin scale (SI):

Answer 21

water freezes at 273K; water boils at 373K

Question 22

at 0K (________ _____) the motion of particles (____)

Answer 22

absolute zero; stops

Question 23

to convert between C and K use the equation:

Answer 23

K=C+273

Question 24

conversion factors

Answer 24

ratios of equivalent measurements