unit 1.1
what is the central science?
chemistry
what are the classifications of matter?
element, compound, homogeneous mixture, heterogeneous mixture
name a physical property
color, hardness, conductivity, melting/boiling points
what are the two most common measuring systems?
metric and imperial
precision is...
yielding the same result (doesn't have to be the right result)
chemistry is the study of composition, properties, and interactions of _______
matter
what phase of matter is not commonly listed? (hint: the fourth)
plasma
what is the ability to change from one type of substance to another?
chemical change
16.5
accuracy is...
yielding a result close to the correct/expected result
Who were the ancient chemists?
Alchemists
what phase of matter has definite volume but not definite shape?
water
what are three physical changes?
changes in shape, state, size or dissolving in water
what are three ways to measure temperature? (units)
Kelvin, Fahrenheit, Celcius
how many rules are there for significant figures?
5
what is a term in science used to describe natural phenomena?
Law
The weight of an object is force acted upon that object by _____.
gravity
an extensive property is based on?
how much matter is present
volumes are expressed in cubic length or ____
liters
measurements can only be added or subtracted if they are in the same what?
units
a molecular model belongs in which domain of chemistry?
symbolic
the law of ______ states that matter cannot be created nor destroyed.
conservation of matter
a chemical change produces?
one or more types of matter that differ from the matter present before the change
the formula for density is what?
density=mass/volume
how many significant numbers are in this figures? 0190.80620