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science final
~
29
Science
9th Grade
01/12/2012

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Cards

Term
List the steps of the scientific method in order and give their definition
Definition
1.) problem/question- develope a question or problem that can be solved.
2.) observation/research- make observations and research your topic of interest.
3.) Formulate a hypothesis- predict a possible answer to the problem or question.
4.) experiment- develop and follow a procedure.
5.) Collect and analyze results- modify the procedure, confirm the results.
6.) conclusion- include a statement that accepts or rejects the hypothesis
Term
what is a control? what is a variable?
Definition
The control variable is something that is constant and unchanged in an experiment.

variable is something that changes in an experiment
Term
What happens at each of the R.A.C.E method?
Definition
restate. analyze, cite data, expand/error
Term
time
Definition
seconds. s
Term
distance
Definition
meters. m
Term
mass
Definition
kilogram. kg
Term
volume
Definition
cubic meter. m³
Term
density
Definition
kilogram per cubic meter. kg/m³
Term
velocity
Definition
meter per second. m/s
Term
acceleration
Definition
meter per second squared. m/s²
Term
force
Definition
newton. N
Term
work
Definition
joule. J
Term
power
Definition
watt. W
Term
energy
Definition
joule. J
Term
momentum
Definition
kg•m/s
Term
what does cm²? cm³?
Definition
is the area or volume of something
Term
what is water displacement?
Definition
Water displacement is a method of measuring an object's volume. Water displacement demonstrates the idea that matter has volume
Term
what is density? how do you figure out density?
Definition
Density is how much mass a material has for a given volume. *mass divided by volume
Term
define velocity? how is it different than speed?
Definition
The speed of something in a given direction. Speed is the rate of motion, but does not contain an element of direction.
Term
what does constant velocity mean?
Definition
Neither speed nor direction of motion changes.
Term
what are displacement vectors?
Definition
represents the length and direction of that imaginary straight path.
Term
define terminal velocity?
Definition
Terminal velocity is a state where the force of drag and the force of gravity acting on an object are equal.
Term
define acceleration (positive and negative)
Definition
an object whose speed increases as it moves away from its orginial starting position.
Acceleration in a direction opposite to the velocity, or in the direction of the negative axis of a coordinate system.
Term
Define force?
Definition
a push or pull
Term
what are newton's three laws? examples.
Definition
first-An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
second- Acceleration is produced when a force acts on a mass. The greater the mass (of the object being accelerated) the greater the amount of force needed (to accelerate the object).
third- For every action there is an equal and opposite re-action.

skateboarder hitting a rock
kicking a soccer ball then kicking a wall needed more force
rocket pushing on ground while ground pushes back
Term
define momentum?
Definition
force or speed of movement; impetus, as of a physical object or course of events
Term
deine gravity?
Definition
the force of attraction by which terrestrial bodies tend to fall toward the center of the earth
Term
describe free fall?
Definition
any motion of a body where gravity is the only force acting upon it
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