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Chpater 1, 2 ,3
test
29
Physics
9th Grade
09/09/2008

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Cards

Term
What is science
Definition
a way of thinking


natures rules for connecting things
Term
What is technology
Definition
way of doing





theoretical vs. practical
Term
evolution
Definition
change in genes overtime
Term
what is physics
Definition
bases of all sciences
Term
science
Definition
natures phenomena explained
Term
religion
Definition
natures purpose explained
Term
fact
Definition
close agreement by competent observers who make a series of observations of the same phenomenon
Term
hypothesis
Definition
testable guess
Term
theory
Definition
syntheses of a large body of information that encompasses well-tested and verified hypotheses about certain aspects of the natural world
Term
laws/principles
Definition
considered to be absoultue
Term
what is the scientific method and its purpose
Definition
1. Problem
2. Hypothesis
3. Predict Outcome
4. Test Predictions
5. Conclusion


purpose: organize your facts
Term
what is force
Definition
any push or pull
Term
what does it do
Definition
make something move

change state of motion
Term
net force
Definition
combination of forces acting on an object
Term
equilibrium
Definition
the state wherein there is no physical change occuring
Term
tension
Definition
stretching force
Term
weight
Definition
mass times gravity
Term
normal force
Definition
equals weight
Term
static
Definition
equilibrium- not in motion
Term
dynamic equilibrium
Definition
moving at a constant speed in a constant direction
Term
vector
Definition
an arrow that represents magnitude and direction
Term
scalar quantity
Definition
only tells you magnitude
Term
pythagorean theorm
Definition
a2 +b2 =c2
Term
resultant
Definition
combination of 2 vectors
Term
friction
Definition
force that acts between the materials
Term
inertia
Definition
the tendency to resist changing of the current state


constant velocity in absence of force


force is required for change
Term
mass
Definition
measure of inertia

measured in kg
Term
inertia determined by mass
Definition
more mass the more inertia which means for face is required
Term
what is the difference between volume and mass
Definition
volume is how much space it takes up

mass id how much is in it.
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