Chapter 1 And 2 Flashcards
The 3 steps involved in solving scientific problems
Define the problem (gather info, facts)
Propose solutions (form hypotheses and organize info)
Evaluate your proposed solutions (develop experiments)
Science that deals with the materials of the universe and the changes that these materials undergo
Chemistry
A process of studying natural phenomena that involves making observations, forming laws and theories, and testing theories by experimentation
Scientific method
Quantitative observations involves
Numbers
Possible explanation for an observation
Hypothesis
Set of tested hypotheses that Gives an overall explanation of some part of nature
Theory
How does a hypotheses become a theory
Set of hypotheses that agrees with various observations
Difference between theory and observation
Observation- something that is witnessed and can be recorded
Theory- interpretation, possible explanation
How is experiment used to refine theory
Making new observations
Generally observed behavior
Natural law
Observation that the total mass of materials is not affecte by chemical change in those materials
Law of conservation of mass
Difference between law and theory
Law- summary of observed behavior
Theory- an explanation of behavior
Author doesn’t think science automatically leads to profess
Continual progress, doesn’t just stop
A quantitative observation
Measurement
Measurement consists of what two parts
Numbers and units
Why are units important
Units tell scale
Technique used to express very large or very small numbers
Scientific notation
Necessary in chemistry
Make number more compact and easier to write
Part of a measurement tells us what scale is being used to represent the results of the measurement
Units
Two most widely used system of units
English system and metric system
Which is used in chem
Metric system, si
M
Mega
K
Kilo
D
Deci
C
Centi
m
Milli
u
Micro
n
Nano
Mass
Kilogram
Length
Meter
I cubic centimeter
= a millimeter
Quantity of matter present in a object
Mqss
Changing from one unit to another via conversion factors
Dimensional analysis
Boiling point in kelvin
373
Boiling point of Fahrenheit
212
Freezing point in kelvin
273
Freezing point in Fahrenheit
32
