Chemistry Intro

What is Chemistry?
The study of  matter and that changes it undergoes
What are the 5 types of chemistry?

1. Organic

2. Inorganic

3. Physical

4. Analytical

5. Biochemistry

What is a systematic approach used in scientific study?
Scientific Method
What is the first step in the Scientific Method?
Observation
What are the types of observations? What are the differences between each one?

1.Qualitative- 5 senses

2.Quantitative- measurements (anything with numbers)

What is a hypothesis?
Tentative explanation for what has been observed
T/F. An experiment is a set of controlled observations that test the hypothesis, one variable, a quantity or condition that can have more than one value at a time.
True
What’s the difference between independant/dependant variable?

1.Independant is the one that you change

2.dependant relies/reacts to the independant

What is a constant?
factor that is not allowed to change during the experiment
What is a standard for comparison (starting point)?
Control
What is a conclusion?
a judgement based on the information obtained
What is a theory?
an explanation that has been supported by MANY experiments
What is the duration of all existence, past, present, and future?
Time
What is the base unit in time?
Seconds
What is the instrument used to measure time?
Clock

What is the definition of length?

What is the base unit?

What is the instrument?

1.distance between two points

2.meters

3.meter stick

What is the definition of mass?

The base unit?

Instrument?

1.amount of matter in an object

2.kilogram

3.balance

What is the definition of weight?

What is the base unit?

What is the instrument?

1.amount of matter in an object and the effect of earth’s gravitational pull on that matter

2.pounds

3.scale

What is the definition of temperature?

What is the basic unit?

What is the instrument?

1.measure of how hot or cold an object is relative to other objects

2.Kelvin

3.thermometer

What are the formulas for:

 

1.Celsius to Kelvin

2.Kelvin to Celsius

3.Celsius to Farenheit

4.Farenheit to Celsius

1.Celsius + 273

2. Kelvin – 273

3. (9/5)(Celsius) +32

4. 5/9(Farenheit -32)

What is the definition of volume?

What is the base unit (solid)?

What is the base unit (liquid or irreg. solids)?

1.space occupied by an object

2.cubic centimeter

3.liter

What is the definition of density?

What is the formula to find density?

What is the base unit?

1.ratio that compares the mass of an object to its volume

2.d=m/v

3.g/cm3

What is the base unit for the amount of a substance?

1 mole=?

1.mole

2. 6.02 X 1023 particles of a substance

What is accuracy?
how close a measured value is to an accepted value
What is precision?
how close a series of measurements are to one another