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92 Cards in this Set

  • Front
  • Back
Measurement standard is defined as
exact quantity
kilo prefix is
mili prefix is
SI unit of temperature is
K (Kelvin)
Si unit for time is
variable on the x axis of a graph is
independent variable
in a graph showing change in temperature of a material over time temperature is
dependent variable
best graph used to show a fixed quantity broken down into parts is
pie chart
benefit of the SI unit
measurements based on 10s
Light bulb is an example of
another word for technology is
applied science
gather information through the senses is
the first step to an experiment is to
state the problem
rule or principle that describes nature is
scientific law
event based on repeated observation and experiments is
how can you represent an idea , event , or object and better peoples knowledge of it ?
standard for comparison that helps to ensure that the experimental results is caused by the conditions being tested is called
factor that changes due to the manipulation of the independent variable
dependent variable
factor does not change in an experiment is the
study of something to prove a hypothesis
application of scientific knowledge to help people is know as
motion is change in
speed on the speedometer is
instantaneous speed
3 meters per second north is an example of
relationship between speed distance and time is
single point on a distance- time graph tells the
instantaneous speed
acceleration is the rate of change of
you ride a bike up a hill then back down your acceleration is
negative going up and positive going down
Equation to find acceleration
vf-vi =( ..) / t
horizontal line on a velocity/time graph shows
0 acceleration
inertia varies depending on
newtons first law of motion is called
the law of inertia
upward force on an object falling through the air
Air resistance
relationship among mass, force , and acceleration is explained by
newtons 2nd law
in the absence of air ,a penny and a feather are dropped from the same height at the same time . what will happen
the penny and feather fall at the same rate
acceleration due to gravity is
9.8 m/s squared
according to newtons second law of motion
an object moves in a circular path it accelerates toward the center of the circle as a result of
centripetal force
The path of a projectile is
curved , parabolic
the greater the force applied to it the greater its
acceleration will be , and applies to any object
the size of gravitational force between two objects depends on
mass and distance
the farther from earth you get your weight
when force is exerted on a box an equal and opposite force is exerted by the box these forces are
action and reaction forces
in P=M X V ,P represents
top every action there is an equal and opposite reaction is
newtons 3rd law of motion
unit of momentum
kilogram meters per second kg/m
when two balls collide the momentum of the balls after the collision is explained by
conservation of momentum
an object in free fall seems to be
if gravity did not affect the path of a horizontally thrown ball , the ball would
travel horizontally
when an object falls its reacting to
force that retards motion between two surfaces that are touching is
the greater an objects mass the greater its
gravitational force
when you push a box it doesn't move due to
static friction
kinetic energy of an object increases as its
velocity increases
the SI unit for energy is
equation for kinetic energy
1/2 M.V squared
equation for potential gravitational energy
the total amount of energy in the universe
remains constant
energy does not have to involve
Energy is measured in
when swinging potential energy is greatest at
your highest point , top of an arch
total energy is equal to the sum of
the potential and kinetic
as an object falls its potential energy
Energy due to motion is
Kinetic energy
Energy cannot be created nor destroyed is the law of
conservation of energy
a surface slanted used to raise an object is an
inclined plain
a device that does work with only one movement and changes size or direction of force is a
Simple machine
a bar free to pivot about a fixed place is a
rate at witch work is done is
machine multiplies an effort is called
mechanical advantage
inclined plane with one or two slopping sides forms a machine called
a wedge
inclined plane wrapped around a cylindrical post
a screw
unit of power
arrangement of pulleys designed to reduce effort
block and tackle
two simple machines that are part of a bicycle
gear , wheel and axle
all 3 classes of levers are found in
the human body
work done over a distance
friction changes useful work into
thermal energy
reduces flow of heat by conduction , convection and radiation is
an insulator
transfer of energy that does not require matter is
refrigerators and a/c units are examples of
heat movers
engines burn fuel by
gasoline and diesel engines are
internal combustion
all matter is in
constant motion
heat moves
warmer to cooler
energy is transferred through
resistance is measured in
electrical energy
P= I.V
energy a wave carries is measured in
frequency is measured in