Chapter 1

Question	Answer
Science	An organized way of gathering and analyzing evidence about the natural world, a process.
Observation	The act of noticing and describing events or process in a careful, orderly way.
Data	Detailed records of experimental observations.
Quantitative Data	Numbers obtained by counting and measuring.
Qualitative Data	Descriptive involved characteristics that normally can not be measured.
Hypothesis	A scientific explanation for a set of observations that can be tested in ways that support or reject it.
Controlled Experiment	An experiment in which only one variable is changed.
Independent Variable	The variable that is deliberately changed.
Dependent Variable	The variable that changes in response to the independent variable.
Theory	Well tested explanation that unifies a broad range of observations.
Atom	Basic unit of matter.
Element	Pure substance.
Atomic Number	Number of protons in nucleus.
Isotopes	Number of protons and neutrons in nucleus.
Compound	Substance formed by a chemical change.
Ionic Bond	Formed when electrons transfer from one atom to another. Oppositely charged atoms are then attracted to each other to form the bond.
Molecule	Structure that results when two or more atoms bond.

Resource summary

	Created by Crystal Waters about 12 years ago