Physical Science Chapter 1
independent variable
The experimental factor whose effect is being studied.
Absolute zero
0K, when atoms can no longer move
Hypothesis
A educated prediction that answers the testable question in an experiment. Sometimes written as an if then statement.
Constant
A factor in an experiment that is the same for all experimental groups
formula for density
D = m/v
Control Group
In an experiment, the group that is left in a natural state - used as a comparison
SI unit for temperature
Kelvin
formula for volume
LxWxH
Bias
When the expectations of a scientist affect the outcome of their analysis
theory
a hypothesis that has been tested multiple times and has stood up to extended scrutiny.
mass
a measurement of the quantity of matter in an object
Experiment
a set of controlled observations that test the hypothesis
law
a statement that describes observations about natural phenomenon
distance
a unit of length
graph
a visual display of information or data
standard
an exact quantity that people agree to use to compare measurements
Scientific Method
an organized set of investigative procedures
bar graph
compares information collected by counting
temperature
how hot or cold something is
density
mass per unit volume of a material
the SI unit for length
meters
model
represents an idea, event, or object and helps people better understand it
SI unit for time
seconds
circle graph
shows how a fixed quantity is broken down; represents the total and slices represent the different parts
line graph
shows relationship where dependent variable changes due to a change in the independent variable
SI
the international system of units
time
the interval between two units
volume
the space occupied by an object
dependent variable
what changed because of the experiment