speed is the rate of change in ___________

distance

to describe velocity you need to know _____ and _____________

speed & direction

when you graph the motion of an object, you put ______ on the horizontal axis and ___________ on the vertical axis

time & distance

acceleration involves a change in ________

speed/direction

inertia depends on ___________________________________________________

resist a change in its motion

if you exert a force on an object in motion you will change its _____________

momentum

the distance traveled divided by the time taken to travel the distance is ___________ _______

speed

momentum is a measure of ___________________________________________________

how hard it is to stop an object

forces that are equal in size but opposite in direction are ______________

balanced forces

if gravity did not affect the path of a horizontally thrown ball, the ball would __________________________

travel horizontally

newton's first law of motion states that an object remains at rest unless a(n) __________ force acts on it

unbalanced

the force you have to overcome to start an object moving is _______________________

static friction

whenever a body is in motion, there is always __________ to oppose the motion

friction

the relationship among force, mass, and acceleration is stated in newton's _____ law

2nd

the statement "for every action, there is an equal but opposite reaction" is a statement of newton's ___ law

3rd

with action-reaction forces, what happens first?

forces are created at the same time

when a diver jumps off a diving board, gravity pulls him or her down to the water. what is the reaction force to earth's gravity?

air resistance slows the diver

which of the following is NOT an example of work being done?
a. the moon orbiting earth
b. pushing a box from the bottom of a hill to the top of the hill
c. pilling a sled across a field covered with snow
d. lifting a bookbag off the flow

a. the moon orbiting earth

a slanted surface used to raise an object is a(n) ____________________

inclined plane

a device that does work with only one movement and changes the size or direction of a force is a(n) _______________________

simple machine

a bar that is free to pivot about a fixed point is a ______

lever

the rate at which work is done is called _______

power

the work output of a machine divided by the work output is the ____________________________ of the machine

efficiency

the amount by which a machine multiplies an input force is called the ________________

mechanical advantage

an inclined plane with one or two sloping sides forms a machine called a ________

wedge

an inclined plane wrapped around a cylinder is a _______

screw

a winding mountain road is an example of a(n) ________

screw

when two or more simple machines work together, they are called a(n) ____________________

compound

three of the following simple machines are basically the same. which one that does NOT belong in the group?

lever, wedge, pulley, wheel & axle

wedge

which one of the following is NOT an example of a mechanical wave?

radio wave

which one of the following is NOT an example of an electromagnetic wave?

sound wave, red lght, x-rays, gamma rays

sound wave

which one of the following is NOT an example of a compressional wave?
a. wave moving through a coiled spring
b. sound traveling through the air
c. sound traveling through water
d. green light traveling through the air

d. green light traveling through the air

tsunamis have a large amount of energy because of their large _____________

amplitude

a place where molecules are far apart is a ______________

rarefaction

when light bounces off a surface it is called ___________

reflection

in which one of the following cases will refraction occur?
a. light traveling from air to glass
b. light reflecting off of a mirror
c. light blending around the corner of a door
d. green light interfering with blue light

a. light traveling from air to glass

to produce sound, an object must be __________

vibrating

you produce speech by vibration of the _______

vocal cords

____________ is the human perception of the energy a wave carries

loudness

sound travels fastest in a __________

solid

when you speak, your words are transferred to a friend by ______________________

molecules colliding

if you pass a building with a siren sounding, as you move away from the building, the sirens will sound ___________

lower

the part of the ear that transfers sound vibrations to the cochlea is the ___________________

oval window

the number of waves that pass a certain point in one second is the wave's ________________

frequency

sunscreen protects the skin from damage caused by _________________

u.v. radiation

a wave transfers ___________

energy

electromagnetic waves are produced by ___________________________________________________

charged particles in motion

vibrating charged particles make _______________ fields

magnetic/electric

electromagnetic waves carry ______________ energy

radiant

the longest wavelength in the electromagnetic spectrum is the ______________

radio waves

the electromagnetic waves with wavelengths slightly longer than visible light are _____________

infrared

_____________ are used for medical imaging

x-rays

television uses ____________________ to transmit signals

radio waves

the material in which a wave travels is called ___________

medium

glass is an example of a ____________ material

transparent

if an object looks blue, it reflects ________ waves

blue

how can you describe the image formed by a plane mirror?

upright & reversed

if light waves change speed when they pass from one medium into another, the light will be ____________

refracted

which one of the following is think in the middle and thin at the edges?

concave lens, concave mirror, convex lens, plane mirror

convex lens

normally, atoms are electrically neutral because there are _________________________________________

equal # of protons & electrons

the buildup of electric charges on an object is called a ___________________

static charge

a material through which electrons do NOT readily flow is a(n) _______________

insulator

two objects will attract one another when they have _____________________________

opposite charges

one example of a good conductor is ________

copper

a magnetic field gets stronger as you ____________________________

get closer to the charge

the steady flow of electrons through a conductor is ____________

electric current

a battery is not used in which of the following:

flashlight, a portable radio, microwave, toys

microwave

copper is used in household wiring because _____________________

it has a low resistance

a path created for a current that allows only one route for the current is called a _________________

series circuit

the rate at which an electrical device converts energy from one form to another is called _________

electrical power

which of the following is a device designed to open an overload circuit and prevent overloading?

electrical energy, circuit breaker, electrical power, voltage regulation

circuit breaker

electric companies usually sell electrical energy in units of ___________

kilowatt hours

a circuit that has two or more separate paths for electrons to follow is a(n) ___________________

parallel circuit

the south pole of a magnet ________________________

attracts the north pole

when you break an iron magnet into two pieces, you get ______________

2 north poles & 2 south poles

the location of the strongest magnetic field is the ______

magnetic pole

the region around a magnet where the magnetic forces act is the ________________________

magnetic field

atoms become magnets when their _____________ are properly arranged

electrons

an electromagnet is _______________________________
________________

only operating when the current is on

the function of an electric motor is to change ______________________________

electrical energy into mechanical energy

a current carrying wire wrapped around an iron ore is called a(n) ___________________

electromagnet

changing the current changes the __________________ of an electromagnet

direction/strength

current that does not reverse direction is called ______________________

direct current

a current that reverses direction in a regular pattern is called a(n) ____________________________

alternating current

knife

wedge

leaf rake

lever

wheelchair ramp

inclined plane

potter's wheel

wheel & axle

threaded bolt

screw

does not require a medium to travel through

electromagnetic wave

light waves and water waves are examples of this

transverse wave

interaction of various different waves

interference

can be either transverse or compressional

mechanical wave

sound waves are an example of this

compressional wave