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74 Cards in this Set

  • Front
  • Back
the first step in the scientific method which is using your senses to gather information
observation
a rule of nature that sums up related observations and experimental results to describe a pattern in nature
scientific law
the practical use of scientific information
technology
factor whose value depends upon the value of the independent variable
dependent variable
the factor adjusted by the experimenter
independent variable
the interval between two events
time
the amount of space occupied by an object
volume
the SI unit for temperature; zero K=absolute zero(the coldest possible temperature -276ºC)
kelvin
the mass per unit volume of a material
density
a measurement of the matter in an object
mass
tenth
deci
hundreth
centi
describes both speed and direction of an object
velocity
a push or a pull one body exerts on another
force
the rate of change in position, or “rate of motion”
speed
the tendency of an object to resist any change in its motion
inertia
the rate of motion at any given instant
instantaneous speed
the greatest velocity reached by a falling object. Terminal velocity is best achieved when the force of gravity is balanced by air resistance
terminal velocity
human-made devices that orbit Earth for a specific purpose
artificial satellite
occurs when waste heat significantly changes the temperature of the environment
thermal pollution
energy in the form of motion
kinetic energy
stored energy
potential energy
the total amount of kinetic and potential energy in a system
mechanical energy
the first artificial satellite launched in 1957 by the Soviet Union
Sputnik
the study of matter and energy
physical science
a testable prediction
hypothesis
a factor that doesn’t vary in an experiment
constant
study of science for the sole purpose of advancing our knowledge
pure science
process that uses certain skills to solve a problem
critical thinking
in measurement, an exact quantity that everyone agrees to use as a basis of comparison; for example, a centimeter, meter, kilogram, cubic decimeter, liter, Kelvin, joule and so on
standard
a visual display of information or data
graph
the SI unit for time
second
used to measure small mass
gram
the SI basic unit of length (m) 100 cm=1 m
meter
of 100
hecto
of one-millionth
milli
the force that opposes motion between two surfaces that is touching each other
friction
the measure of the force of gravity on an object
weight
the total distance traveled divided by the total time of travel
average speed
a speed that does not vary
constant speed
forces on an object that are equal in size and opposite in direction
balanced forces
the force air exerts on a moving object
air resistance
anything that is thrown or shot in the air
projectile
is the unit scientists use to measure the amount of energy contained in different foods
calorie
the total energy of the particles in a material
thermal energy
the amount of energy it takes to raise the temperature of 1 kilogram per Kelvin
specific heat
the measure of the average kinetic energy of the particles in a sample of matter
temperature
an explanation based on many observations
theory
a symbolic representation of an idea, system, or structure to make something understandable; they can help us solve problems and deal with things difficult to see because they are too large or too small
model
a standard for comparison
control
an organized procedure for testing a hypothesis
experiment
British scientist that the joule was named after
James Joule
is used to show how some fixed quantity is broken down into parts
circle graph
used to show trends or how the data change over time
line graph
is useful for comparing information collected by counting
bar graph
occupies the same volume as a cubic decimeter (dm³)
liter
units obtained by combining SI units
derived unit
of 1000
kilo
of 10
deca
every object in the universe exerts a force on every other object. This is gravity
gravity
the sum of the forces on an object when unbalanced forces are applied to it; it changes the object’s speed, direction, or both
net force
created the three laws of motion
Issac Newton
the rate of change in velocity
acceleration
created the pendulum
Jean Foucault
acceleration toward the center of a curved or circular path
centripetal acceleration
the force acting toward a center of a curved or circular path
centripetal force
a property a moving object has because of its mass and velocity
momentum
thermal energy that flows from something with a higher temperature to something with a lower temperature
heat
transfer of energy through motion
work
ability to cause change
energy
states that energy may change form but it cannot be created or destroyed under ordinary conditions
law of conservation of energy
what are the seven types of energy?
1. mechanical
2. electrical
3. nuclear
4. chemical
5. heat/thermal
6. radiant/light
7. sound
what are the five steps of the scientific method?
1. Determine the problem (What do you want to find out?)
2. Make a hypothesis. (What prediction do you want to test?)
3. Test your hypothesis. (What steps can you take to reach a conclusion about your hypothesis? What measurements should you record?)
4. Analyze the results. (What happens during your experiment?)
5. Draw conclusions. (Do your observations and data suggest that your hypothesis is supported? If not, do you think your hypothesis should be changed, or do experimental procedures need adjustment?)
what are Newton's three laws of motion?
1. An object moving at a constant velocity keeps moving at that velocity unless a net force acts on it
2. A net force acting on an object causes that object to accelerate in the direction of the force
3. The action-reaction law; “to every action force there is an equal and opposite reaction force”