the smallest unit of an element that maintains the properties of that element
100
The reason for organizing, analyzing, and classifying data is...?
to find relationships among the data
100
What is quantity?
something that has magnitude, size, or amount
200
What is a reactant?
Physical means that can be used to separate
200
Quantitative observations are recorded using...?
numerical information
200
What is hypothesis?
a testable statement
300
What is a nonmetal?
an element that is a poor conductor of heat and electricity
300
A plausible explanation of a body of observed natural phenomena is a scientific...?
a.) law
b.) theory
c.) principle
d.) all of the above
b.) theory
300
What is a significant figure?
any digit in a measurement that is known with certainty plus one final digit, which is somewhat uncertain or is estimated
400
What is physical properties?
a characteristic that can be observed or measured without changing the identity of the substance
400
Which of these is not an example of unit...?
a.) weight
b.) gram
c.) teaspoon
d.) kilometer
a.) weight
400
What is SI?
the measurement system accepted worldwide
500
What is heterogeneous?
not having a uniform composition throughout
500
The number of grams equal to 0.5 kg is...?
500.
500
What is percent error?
a value calculated by subtracting the experimental value from the accepted value, dividing the difference by the accepted value, then multiplying by 100