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# Unit 1

### Physical Science, Measurement, and Scientific Method

WordDefinition
physical science The study of matter and energy
chemistry The study of matter and its changes
physics The study of forces and energy and how they affect matter
matter Anything that occupies space and has mass
gravity A force of attraction of the earth for a given object, or of one mass to another
energy The ability to do work or cause change
kinetic energy Energy of motion
potential energy Energy an object has due to position
Law of Conservation of Energy Energy cannot be created or destroyed, but can change from one form to another
weight A measure of the force of gravity acting on an object
spring scale The tool used to measure force
newton (N) The basic metric unit of measure of force
mass A measure of the amount of matter in an object
balance The tool used to measure mass
kilogram (kg) The basic metric unit of measure of mass
length The measure of the distance from one point to another
meter stick A tool used to measure length
meter The basic metric unit of measure for length
volume A measure of the amount of space occupied by an object
graduate A tool used to measure volume
liter (L) The basic metric unit of measure of volume
meniscus The curved surface found at the top of a contained liquid
scientific method A process used for gathering evidence that leads to understanding
observation An examination of something using your senses
hypothesis A possible answer to a problem and a statement the can be tested
experiment A controlled procedure designed to test a hypothesis with measurable results
data Carefully documented results of an experiment used to draw a conclusion
conclusion A statement that proves if the data supports the hypothesis
theory A hypothesis that has been tested and supported many times
control group The group in which all variables remain the same
experimental group The group in which one variable has been changed
infer The process of drawing conclusions based on experience and prior knowledge
variables All factors that can influence the outcome of an experiment
independent variable The variable that is deliberately changed by the experimenter; the manipulated variable (x-axis)
dependent variable The variable being measured and observed; the outcome or responding variable (y-axis)
constant variables The variables that remain the same throughout the experiment; constants or controlled variables
Created by: steach311