Physical Science Midterm

1.Distinguish between a theory and scientific law.

A theory is a possible explanation for observations, while a scientific law describes a pattern but does not explain why things happen.

2.List the steps of the scientific method

Problem, Hypothesis, Research, Materials List, Experiment Design, Independent Variable, Dependent Variable, Data Collection, Data Analysis, and Conclusion.

3.Describe the SI system and make a table of SI Base units and a table of SI Prefixes (text pg 13) 

The Sl system is the improved version of the metrics system that is based on multiples of ten and includes the meter. 

Sl Base Unit table

Quantity Measured

Unit

Symbol

Length

meter

m

Mass

kilogram

kg

Time

second

s

Electric Current

ampere

A

Temperature 

kelvin

K

Amount of substance 

mole

mol

Intensity of light

candela

cd


Sl Prefixes Table 


Prefix

Symbol

Multiplying Factor

Kilo-

k

1,000

Deci-

d

0.1

Centi-

c

0.01

Milli-

m

0.001

micro-

0.000 001

nano-

n

0.000 000 001