Five steps of the Scientific Method: a,b,c,d,e 

a: observe
b: hypothesis
c: materials
d: procedure
e: conclusion


difference between qualitative and quantitative 



Calculate the following: (you may use a calculator)
a. (1.3 x 10^{4}) x (3.6 x 10^{6}) :
b. (2.3 x 10^{4}) ? (1.1 x 10^{2}) :
c. (5.6 x 10^{9}) + (1.0 x 10^{2}) :
d. (2.9 x 10^{2}) – (1.0 x 10^{2}) :



Put the following in scientific notation.
a. 56790
b. 1,000,000
c. .0056
d. .203


a. 5.679 * 10^4
b. 10^6
c. 5.6*10^3
d. 2.03*10^1


# of sig figs? a. 23400
b. 0.987
c. 34
d. 0.00987
e. 685.990 f. 101420


a. 3
b. 3
c. 2
d. 3
e. 6
f. 5


Calculate with sig figs:
a. 23.500 + 78.0232
b. 0.0983 * 4532.1
c. 45.67 – 0.98
d. 450 – 25.5


a. 101.523
b. 446
c. 45
d. 420


Round to sig fig in () a. 8590.3 (4)
b. 0.0074 (1)
c. 23.845 (4)
d. 130.88 (3)


a. 8590.
b. .007
c. 23.85
d. 131


Units and instrument for each a. Length
b. Mass
c. Temp
d. Volume


a. meters– meter stick
b. kg– scale
c. Celcius– Thermometer
d. Liters– graduated cylinder


# of exponent to the prefix
a. kilo b. milli
c. nano d. Mega
e. centi f. Micro


a. 3
b. 3
c. 9
d. 6
e. 2
f. 6


Calculate: a. 1500 km= _m
b. 2.5 pg= _mg
c. 539.54 nm= _Mm
d. 34 m^3= _cubic cm





An object has mass of 25g and volume of 6.5cm^3. What’s the Density? 


A brick has a mass of 105.8g. It is the form of a rectangular block with the dimensions of 11.13cm, 22.25cm, and 33.54cm. What is the density? 


The Density of water is known to be 1.00g/cm^3. The sample we used had a mass of 35.28g. What was the volume of the water? 


Convert the following:
a. 56.5C= _K
b. 210K= _C



What is the law of conservation of mass? 

Mass is not created or destroyed. 

What are the three main states of matter?


a. solid
b. liquid
c. gas



Anything that has mass and takes up space. 

Physical or Chemical properties?
a. the car is red
b. the element ignited when put in water.
c. The melting point is 18C
d. it reacts with oxygen



Physical or Chemical change?
a. cutting a piece of paper
b. burning gasoline
c. a car rusts
d. a chocolate bar melts




A pure chemical substance 


a pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances 


When two substances are mixed but not combined chemically 


Stubstances are called “pure” to set them apart from mixtures. 





HomoX or heteroY
a. beach sand
b. salt dissolved in water
c. kechup
d. beef stew
e. milk f. bowl of fruit loops


a. X
b. Y
c. Y
d. X
e. Y
f. X


What are the four methods of separating substances physically? 

a. filtration
b. exraction
c. decanting
d. evaporation


What is the law of constant composition? 

Matter is not created or destroyed 

What did dalton contribute to the atomic theory? 


What did Michael Faraday contribute to the atomic theory? 


What did Ben Franklin contribute to the atomic theory? 

