Experiments and Labs
WHAT IS THE VARIABLE THAT YOU CHANGE AS THE
EXPERIMENTER?
Independent Variable
HOW MANY SIGNIFICANT FIGURES IN THE NUMBER:
2001
4
QUANTITATIVE OR QUALITATIVE:
THE TREE IS LARGER THAN THE BUSH.
Qualitative
WHAT STATE OF MATTER HAS AN INDEFINITE SHAPE,
BUT A DEFINITE VOLUME?
LIQUIDS
WHAT IS THE SMALLEST PARTICLE OF AN ELEMENT THAT RETAINS ITS IDENTITY AND HAS A NEUTRAL CHARGE?
An Atom
WHAT IS THE GROUP IN AN EXPERIMENT THAT DOES NOT GET THE INDEPENDENT VARIABLE (THE NORM)?
The Control Group
HOW MANY SIGNIFICANT FIGURES IN THE NUMBER:
003500.00
6
PRECISE AND/OR ACCURATE:
IF A SCALE DOES NOT MEASURE THE CORRECT MASS
BUT IT GIVES THE SAME MEASUREMENT EACH TIME.
WHAT IS IT?
PRECISE, NOT ACCURATE
WHAT KIND OF MIXTURE IS EVENLY DISTRIBUTED
THROUGHOUT ITS ENTIRETY?
HOMOGENEOUS MIXTURES
HOW CAN YOU TELL HOW MANY NEUTRONS ARE IN
AN ATOM?
HOW CAN YOU TELL HOW MANY NEUTRONS ARE IN
AN ATOM?
NEUTRONS = ATOMIC MASS – ATOMIC NUMBER
EVERYTHING IN AN EXPERIMENT THAT IS HELD
CONSTANT TO KEEP THE RESULTS VALID
Controlled variables
WHAT IS THIS NUMBER IN SCIENTIFIC NOTATION:
1738
1.738 X 103
MATTER IS ANYTHING THAT TAKES UP _____
AND HAS ______.
Space, Mass
EXTENSIVE OR INTENSIVE?:
DENSITY
INTENSIVE
WHERE ARE EACH OF THE THREE SUBATOMIC
PARTICLES LOCATED RELATIVE TO THE NUCLEUS?
PROTONS AND NEUTRONS ARE IN THE NUCLEUS
ELECTRONS ARE OUTSIDE THE NUCLEUS
WHAT LAB EQUIPMENT DO WE USE TO MEASURE
VOLUME OF A LIQUID?
Graduated Cylinder
ADD THE NUMBERS AND ROUND TO THE CORRECT
SIGNIFICANT FIGURES:
46.2+37+1.5=
84.7 ROUNDS TO 85 WITH 2 SIGNIFICANT FIGURES
IN A SOLUTION, WHAT IS DISSOLVED IN THE
SOLVENT?
Solute
WHAT METHOD CAN YOU USE TO SEPARATE TWO
LIQUIDS WITH DIFFERENT BOILING POINTS?
DISTILLATION
18.02 GRAMS OF WATER ARE SEPARATED BY ELECTROLYSIS INTO HYDROGEN AND OXYGEN GAS. IF 16.00 GRAMS OF OXYGEN IS OBTAINED, WHAT MASS OF HYDROGEN MUST BE OBTAINED?
2.02 GRAMS OF HYDROGEN GAS
What is the small pill shaped magnet used to automatically stir called?
Stir Bar
WHAT IS THIS NUMBER IS STANDARD NOTATION:
4.36 X 10-2
0.0436
WHAT DO YOU CALL THE PRODUCT THAT FORMS IN A LIQUID MIXTURE?
Precipitate
IS COMBUSTIBILITY A PHYSICAL OR CHEMICAL
PROPERTY?
Chemical
HOW DO YOU DIVIDE TWO NUMBERS IN SCIENTIFIC
NOTATION?
YOU DIVIDE THE LEFT SIDES OF THE NUMBERS THEN
SUBTRACT THE EXPONENTS FROM EACH OTHER.