Final Flashcards
the study of nature
science
the study of matter and energy
physical science
anything that has mass and volume (takes up space)
matter
the ability to do work or cause change
energy
the amount of matter in an object
mass
the transfer of energy in which a force is put on an object and the object moves in the direction of the force
work
a set of steps used to solve a problem
scientific method
an educated guess made from previous observations and knowledge
hypothesis
the amount of space an object takes up
volume
any factor that can make a change in the results of an experiment
variable
the application of science to help people
technology
an explanation of an event based on observations and experiment
theory
a statement that tells what happens in an event
law
the measure of the average kinetic energy of the atoms in an object
temperature
the mass per unit volume of a material
density
something created to represent an idea
model
a visual display of information used to explain an idea or concept
graph
the distance an object travels over a period of time
speed
the distance an object travels over time and the object’s direction
velocity
the change of velocity of an object over time
acceleration
the acceleration of a falling object due to gravity in a vacuum
g
s property of an object based on the object’s mass and velocity
momentum
any object thrown/shot through the air
projectile
a force between any objects dependent on the mass of the objects
gravity
a downward force on all objects
gravity
any push or pull on an object
force
equal forces but opposite in directions (net force will be 0)
balanced force
a force that is greater in once direction (net force will be greater than zero)
unbalanced force
the sum of all forces acting on an object
net force
the force that opposes the motion between 2 surfaces in contact
friction
an area without air
vacuum
the friction caused by the force of air acting on an object opposing the object’s motion
air resistance
the highest velocity a falling object will reach due to the forces of gravity and air resistance becoming balanced
terminal velocity
the resistance of an object to any change in its motion
intertia
What is often talked about with Newton’s 1st law of motion
intertia
when an object falls without air resistance
free-fall
the measurement of gravitational force on an object’s mass
weight
a force from the center that makes an object move in a curved or circular path
centripetal force
a device used to make work easier
machine
the rate at which work is done
power
a measure of how much work put into a machine is changed into useful work output by the machine
efficiency
a theoretical machine in which the amount of work you put into the machine is equal to the amount of work you get out of the machine
ideal machine
a machine’s ability to make work easier by making Fout greater than Fin
mechanical advantage
the energy of an object due to the object’s motion
Kinetic energy
the energy of an object at rest, or energy stored by an object
potential energy
a unit that measures the energy in food
calorie
the total energy of an object, including both kinetic(temperature) and potential(mass)
thermal energy
the production of energy from the splitting of a uranium nuclei
nuclear fission
the production of energy from the collisions between the nuclei of atoms
nuclear fusion
energy sources found within the earth formed from the decay of plants and animals millions of years ago
Fossil fuels
energy resources that can be produced as quickly as they are used
renewable energy resources
resources that are used up quicker than they can be made
non-renewable energy resources
devices that convert light energy to electricity
photovoltaic cells
where do you see photovoltaic cells
solar calculators
What is Newton’s 1st Law
an object at rest stays at rest and an object in motion stays in motion unless acted upon by an outside force
What is Newton’s 2nd Law
the amount of acceleration an object has depends on the force put om an object and the object’s mass
What is Newton’s 3rd Law
for every action force there is an equal but opposite reaction
State the law of conservation of energy
the law of conservation of energy states that energy can not be created or destroyed, only converted from one form of energy to another
What is the SI unit for length
meter (m)
What is the SI unit for mass
Kg
What is the SI unit for volume
mL or cm^3
What is the SI unit for density
g/mL or g/cm^3
What is the SI unit for time
seconds (s)
What is the SI unit for temperature
kelvin (K)
What is the SI unit for speed
m/s
What is the SI unit for acceleration
m/s^2
What is the SI unit for force
Newtons (N)
What is the SI unit for weight
Newtons (N)
What is the SI unit for work
Joules (J)
What is the SI unit for energy
Joules (J)
What is the SI unit for power
Watt (W)
What is the speed formula
s=d/t
What is the acceleration formula
a=∆V/t or a=F/m
What is the momentum formula
p=mxv
What is the force formula
F=mxa
What is the weight formula
w=mxg
What is the power formula
P=w/t
What is the work formula
w=Fxd
What is the efficiency formula
Eff=Wout/Win
What is the mechanical advantage formula
Ma=Fout/Fin
What is the Volume formula
V=lxwxh
What is the density formula
D=m/v