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28 terms

Physical Science Test 1

STUDY
PLAY
physical science
the study of matter and energy
matter
the stuff of which things are made
chemistry
the study of all forms of matter and how they interact
(properties, structure, how substances behave under different conditions, i.e. heat)
physics
the study of energy and how it effects matter
(motion, force, gravity, electricity, light, sound)
scientific method
a series of steps that scientists use to answer questions and solve problems
observation
any use of the senses to gather information
hypothesis
possible explanation for a set of observations or possible answer to a scientific question

an "if-then" statement
controlled experiment
a control group and an experimental group. both groups are the same except for one factor.
variable
a factor [in an experiment] that is different or changed
analysis
organize data
decide if data supports hypothesis
(sometimes data can be misleading)
scientific theories
a unifying explanation for a broad range of hypotheses and observations that have been supported by testing
theories have not been proven
i.e. creation, evolution
law
summary of many experimental results and observations. determined by nature. tell you WHAT happens but not WHY. i.e. gravity
model
a representation of an object or system
volume:basic unit-liquid and solid
liquid=liters
solid=cubic meters
mass: basic unit
kg
temperature-basic unit
Kelvin(celcius)
lwh (Bh)
volume
volume of an irregular object
measure how much liquid the object displaces (1 ml=1cm cubed)
mass
the amount of matter something is made of
temperature
a measure of how hot or cold something is
water freezes:
0 celcius
32 fahrenheit
body temperature
37 celcius
98.6 fahrenheit
boiling point
100 celcius
212 fahrenheit
derived quantities
Quantities formed from combinations of other measurements are called
area
a measure of how much surface an object has
density
the amount of matter in a given space
steps of the scientific method
problem/question, observation, hypothesis, testing (experiment), data, analysis, [conclusion]
formula:density
m/v