Science Multiple Choice Questions
If household voltage is 120 volts, what is the power rating of a light bulb with 0.5 amps of current flowing through it: 120 watts 600 watts 60 watts 6 watts
60 watts
An object changing direction is an example of: Acceleration Speed Velocity Constant rate
Acceleration
The rate at which velocity changes is called: Instantaneous speed Direction Acceleration Motion
Acceleration
If you know a car traveled 300 kilometers in 3 hours, you can find its: Acceleration Direction Average speed Velocity
Average speed
Waves combine to make a wave with larger amplitude in a process called: destructive interference constructive interference reflection refraction
constructive interference
Visible light is an example of: nuclear chemical electromagnetic electrical
electromagnetic
The ability to do work or cause change is called: energy velocity friction transfer
energy
Refraction occurs when a wave: enters a new medium at an angel hits a surface through which it cannot pass moves around a barrier interferes with another wave
enters a new medium at an angle
According to Newton's third law of motion, when a hammer strikes and exert force on a nail, the nail: creates a friction with the hammer disappears into the wood exerts an equal and opposite force on the hammer moves at a constant speed
exerts an equal and opposite force on the hammer
In physical science, a push or pull is called a: force acceleration inertia motion
force
The distance between two corresponding parts off a wave is the wave's: amplitude vibration frequency reflection
frequency
Potential energy that depends on height is called: gravitational potential energy elastic potential energy kinetic energy mechanical energy
gravitational potential energy
Mechanical waves are classified according to: their size their shape how they move their source
how they move
The tendency of an object to resist change in its motion is known as: mass inertia force balance
inertia
The interaction between two waves that meet is called: reflection refraction diffraction interference
interference
Energy is measured in units called: pounds joules horsepower meters
joules
The energy associated with motion is called: elastic potential energy kinetic energy gravitational potential energy nuclear energy
kinetic energy
Who do you see lightning from a distance storm before you hear thunder: the thunder is produced after the lightning your eyes react faster than your ears light travels faster than sound sound travels faster than light
light travels faster than sound
Waves that move the particles of the medium parallel to the direction in which the waves are traveling are called: longitudinal waves traverse wave surface waves combination waves
longitudinal waves
Which of the following is the SI unit of acceleration : m/s m/s^2 m^2/s s^2/m
m/s^2
The amount of matted in an object is called: inertia mass force balance
mass
The energy associated with the motion and position of an object is called: gravitational potential mechanical kinetic potential
mechanical
What type of energy does a spinning turbine have: thermal electrical nuclear mechanical
mechanical
When you rub your hands together on a cold day you use friction to transform: mechanical to thermal nuclear to electrical thermal to nuclear electrical to electromagnetic
mechanical to thermal
When you multiply mass times velocity, you are looking for what: inertia momentum acceleration force
momentum
The charge on an electron is ________
negative
The law of conservation of energy states that when one form of energy is transformed to another: energy is created in the process some amount of energy cannot be accounted for energy is destroyed in the process no energy is destroyed into mechanical energy
no energy is destroyed into mechanical energy
The charge on a proton is ________
positive
The rate at which energy is transferred is called: time joules work power
power
The bending of waves due to change in speed is called: reflection refraction diffraction interference
refraction
What occurs when vibrations traveling through an object match the object's natural frequency: reflection refraction diffraction resonance
resonance
When an incoming wave combines with a reflected wave in such a way that the combined wave appears to be standing still, the result is a: longitudinal wave standing wave traverse wave surface wave
standing wave
The buildup of charges on an object is called: static discharge static electricity positive charge negative charge
static electricity
Unlike kinetic energy, potential energy is: conserved energy of motion not measurable stored
stored
The ampere is a unit of: magnetism electric circuit electric charge temperature
temperature
According to the law of conservation of momentum, when two objects collide in the absence of outside forces: velocity depresse velocity increases the object have the same momentum before and after they collide the objects have more momentum after they collide than they did before
the object have the same momentum before and after they collide
Which of the following is an example of increasing friction intentionally: waxing skis adding grease to gears on a bike throwing sand on an icy driveway oiling a squeaky door
throwing sand on an icy driveway
The force of gravity on a person or object at the surface of a planter is know as: mass inertia air resistance weight
weight
What is a disadvantage of using fuses: when a fuse burns out, it cannot be used again A fuse shuts off when the current gets too hight A fuse contains thin strip of metal that can melt A fuse prevents circuits from overheating
when a fuse burns out, it cannot be used again
The force that one surface exerts on another when the two rub against each other is called: Friction Acceleration Inertia Gravity
Friction
When an object's position relative to another object is changing: It is in motion It is speeding It had a high velocity It is accelerating
It is in motion
The steepness of a line on a graph is called the: Rise Run Slope Vertical axis
Slope
The greater the mass of an object: The easier the object starts moving The greater its inertia The more balanced it is The more space it takes up
The greater its inertia
If an object moved in the same direction and at a constant speed for 4 hours, which of the following is true: The object's speed changed during the 4 hours The object's velocity did not change The object accelerated during the 4 hours The object decelerated during the 4 hours
The object's velocity did not change
What happens when two forces act in the same direction: They cancel each other out The stringer one prevails Their strengths are added Their sun divided by two is the total force
Their strengths are added
Speed equals distance divided by: Time Velocity Size Motion
Time
When you know both the speed and direction of an object's motion, you know the: Average speed Instantaneous speed Distance traveled Velocity
Velocity
An example of something that stores chemical energy is: light a microwave lightning a plant
a plant
Which of the following has kinetic energy: a rock poised for a fall an archer's bow that is drawn back a car waiting at a red light a rolling bowling ball
a rolling bowling ball
Forces can be added together only if they are: acting on the same object balanced forces unaffected by gravity substantial
acting on the same object
How would you calculate an object's mechanical energy: subtract its potential energy from its kinetic energy multiply its kinetic and potential energies subtract its kinetic energy from its potential energy add its kinetic and potential energies
add its kinetic and potential energies
The law of universal gravitation states that any two objects in the universe that have mass, without exception: attract each other repel each other combine to provide a balanced force create friction
attract each other
Moving water can be used to produce electricity because: chemical energy can be transformed into mechanical energy all forms of energy can be transformed into other forms potential energy can be transformed into kinetic energy energy can be transformed into power
all forms of energy can be transformed into other forms
In a series circuit with three bulbs: there are many paths for the current too take the remaining two bulbs are not affected if one bulb burns out all of the bulbs become dimmer if more bulbs are added a switch is never used
all of the bulbs become dimmer if more bulbs are added
The maximum distance that the particles of a medium move from the rest position is the: amplitude of the wave wavelength of the wave frequency of the wave speed of the wave
amplitude of the wave
A change from one form of energy into another is called: an energy increase conservation of energy work an energy transformation
an energy transformation
What are the highest and lowest points on a standing wave called: nodes antinodes compressions rarefactions
antinodes
How can you increase the momentum of an object: by decreasing its velocity by increasing its mass by increasing its friction by decreasing its acceleration
be increasing its mass
Which of the following is an example of rolling friction: between your toes and the sidewalk as you walk between your bike tires and the road as you ride between a boat and the water as it sails between two hands being rubbed together
between you bike tired and the road as you ride
What type of energy transformation is taking place when natural gas is used to heat water: mechanical to electromagnetic electromagnetic to chemical chemical to thermal thermal to mechanical
chemical to thermal
Materials through which charge can flow easily are called: insulators conductors resistors magnets
conductors
The highest points of a traverse wave are called: troughs crests nodes wavelengths
crests
According to Ohm's law, resistance is equal to voltage divided by: time conduction current potential
current
Power is calculated by multiplying voltage by: current energy resistance voltage
current
Waves combine to produce a smaller or zero-amplitude wave in process called: destructive interference constructive interference reflection refraction
destructive interference
A complete unbroken path through which electric charges can flow is: electric circuit electrical resistance magnetic field line magnetic pole
electric circuit
The force that pulls falling object toward Earth is called: gravity free fall acceleration air resistance
gravity
A connection that allows current to take the path of least resistance is called: short circuit series circuit parallel circuit grounded circuit
grounded circuit
Energy stored in the nucleus of an atom is called: chemical energy mechanical energy electromagnetic energy nuclear energy
nuclear energy
A device used to oped and close an electric circuit is a: light bulb energy source switch resistor
switch
The momentum of an object is in the same direction as its: force acceleration velocity inertia
velocity
Mechanical waves are created when a source of energy causes a medium to: move compress expand vibrate
vibrate
What causes charges to move in a circuit: voltage energy electricity magnetism
voltage
A disturbance that transfers energy from place to place is called a: wave medium vibration compression
wave
According to Ohm's law, what is the resistance of a light bulb if the applied voltage is 9.0V and the current is .30A: .033 ohms 2.7 ohms 30 ohms 8.7 ohms
30 ohms
If an electric water heater uses 40 kW of power and runs for 8 hours, what is the total amount of energy used: 5 kilo-watt hours 32 kilo-watt hours 48 kilo-watt hours 320 kilo-watt hours
320 kilo-watt hours
In speed-versus-time graph, a straight line shows that acceleration is: Decreasing Increasing Changing Constant
Constant
Which of these is an example of deceleration: A bird taking off for flight A roller coaster moving down a steep hill A car approaching a red light An airplane following a straight flight path
A car approaching a red light
A place or object used for comparison to determine if something is in motion is called: A position A reference point A constant Velocity
A reference point
The basic SI unit of length is the: Meter Foot Inch Mile
Meter
On a graph showing distance versus time, a horizontal line represents an object that is: Moving at a constant speed Increasing its speed Decreasing its speed Not moving at all
Not moving at all