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Matter
anything that has mass and volume
Independent Variable (IV)
variables that are changed and what you control (x-axis)
Dependent Variable (DV)
variables that are affected by the change of the IV (y-axis)
Trend Line / Line of Best Fit
a straight line that shows the general trend of data points on a graph
Element
an individual square on the periodic table
Compound
when two or more elements are present on the same molecule
Mixture
when two or more pure substances are present
Measurement
the size, length, or amount of something
Quantitative Data
made with instruments such as rulers, balances, graduated cylinders, beakers, and thermometers
Qualitative Date
use your senses to observe the results
Volume
the amount of space that a substance or object occupies
Mass
the quantity of matter which a body contains
Temperature
the degree or intensity of heat present in a substance or object
Pure Substance
an element or compound
Accuracy
correctness of a result
Precision
amount of times a result has been repeated
Conversion Factor
true ratios, represented as fractions - must include units
Mole
used to count things such as atoms and molecules
6.022×10²³
Mole Equation
Graduation
a mark on a measuring tool that tells you how much is present per mark
K = °C+273.15
Kelvin Equation
Scientific Notation
used to easily write down very large or very small numbers
What is 457,790,000 in scientific notation?
4.5779×108
What is 0.000006 in scientific notation?
6 × 10-6
What is 0.78395 in scientific notation?
7.8395 × 105
What is 1.22 × 10-1 in standard notation?
0.122
What is 3.97 × 10-3 in decimal notation?
0.00397
What is 4.3 × 102 in decimal notation?
430
(|accepted-experimental|/accepted)x100
%Error Equation
Physical Property
a property that can be observed without changing the identity of the substance
Chemical Property
defines how that substance will react with other materials
Physical Change
any change that doesn’t change the identity of the substance
Chemical Change
any changes that change the identity of the substance
Element
Cu (Copper)
Compound
NaCl (Sodium Chloride)
Pure Substance
H2O (Distilled Water)
Mixture
Air
Element
Is He (Helium) a compound or element?
Compound
Is CO2 a compound or element?
100,000 mg
What is 100 g in mg?
10,000 mm
What is 0.01 km in mm?
100 mL
What is 0.1 L in mL?