Group 1
Group 2
Group 3
Group 4
Group 5
100
Whenever a body is in motion, there is always ____ to oppose the motion.
friction
100
The unit of power is the ____.
Watt
100
Lightning is ____.
a large discharge of static electricity
100
A feather falls through the air more slowly than a brick because of ____.
air resistance
100
A tuning fork starts to vibrate when a certain note is played on the piano. This is an example of______.
resonance
200
Resistance is measured in a unit called the ____.
ohm
200
Transferring charge by touching or rubbing is called _____.
charging by contact
200
Forces that are equal in strength but opposite in direction are ____.
balanced forces
200
_____ is a force that opposes the motion of objects that move through the air.
air resistance
200
Electromagnetic radiation with the shortest wavelengths is ____.
radio waves
300
Which is the transfer of thermal energy through the motion of particles caused by temperature differences?
convection
300
A gas commonly used in lighting devices, such as signs, is ____.
neon
300
When a rocket lifts off, its upward momentum is matched by the downward momentum of _____.
hot gases pushed out by the rocket
300
Glass is an example of a ____ material.
transparent
400
Work is the transfer of ____ that occurs when a force makes an object move.
energy
400
_____ is thermal energy that is transferred from something at a higher temperature to something at a lower temperature.
Heat
400
The movement of electric charges in a single direction is called electric _____.
current
400
A tuning fork starts to vibrate when a certain note is played on the piano. This is an example of______.
resonance
500
A car rounding a curve is subject to _____ force.
centripetal
500
A lamp uses 15W of power when it is connected across 25V. What is the current through the lamp? Formula: Power / Voltage
0.60 A
500
When an object moves in a circular path, it accelerates toward the center of the circle as a result of _____.
centripetal force
500
The statement “to every reaction there is an equal and opposite reaction” is _____.
Newton’s 3rd law of motion
500
The amount by which a machine multiplies an effort force is called the ____.
mechanical advantage
M
e
n
u