Light Waves
What wave property of light determines the type of electromagnetic radiation / type of light (radio, visible, UV, etc.)?
Wavelength
One difference between a permanent magnet and an electromagnet is that while a permanent magnet always produces a magnetic field, an electromagnet can be ______ _____ and _____ (for example, a junkyard magnet).
Turned on, off
What type of energy does a moving golf ball have as it travels across a golf course?
Kinetic energy
What force causes a sliding book to gradually slow down and stop?
Friction
In a circuit (Battery, wires, light bulb, switch), what object stores the original potential energy before the switch is turned on?
Battery
What wave property increases when a light source becomes brighter without changing color?
Amplitude
A student brings two bar magnets close together, positioning the south pole of one magnet near the north pole of the other magnet. Identify the interaction that will occur.
Attract
__________ energy is harder to identify in a wind-up toy because it is stored and not visible until it causes a change, such as transferring into motion.
Potential
A gas-powered cart pulls an 800-kilogram load across the floor. If the load were reduced to 400 kilograms, and the force used to move the cart remained the same, the cart would:
When a light bulb glows in a circuit, it provides visual evidence that energy has been ______.
Transferred
True or False: Light carries energy as it travels and does not need matter to move through empty space.
True
A compass needle aligns itself with Earth’s ______ ______ as it moves.
Magnetic field
The ability to make objects move or cause changes is known as _______.
Energy
Wheels on a cart or rollers on a loading dock reduce the force needed to move a box because they decrease ______.
Friction
In sound waves, increasing __________ makes the sound become louder.
Amplitude
A black shirt _______ light, a mirror ______ light, and a clear window ______ light.
Absorbs, reflects, transmits
Magnetic field lines around a bar magnet travel from the ______ pole to the ______ pole.
North, south
A battery-powered toy car is turned on and energy moves from the battery to the motor that makes the car move. What word describes this movement of energy from one part of the system to another?
Transfer
A 75 kg shopping cart is pushed with a force of 50 N and moves steadily at 4 meters per second east through a supermarket. What is the cart’s velocity?
4 m/s east
On the final exam, only when I see the words ________ and ________ should I write a full sentence response (maximum 1 sentence); otherwise, I should keep my answers short and direct.
Explain, describe
Which wave property is most directly related to how much energy a light wave carries?
Frequency
Increasing the electric current in a circuit increases the strength of what type of magnet?
Electromagnet
A battery in a device changes stored potential energy into kinetic energy as the device begins working. What word describes this change from one form of energy into another?
Convert
A student pushes against a tree with a force of 25 newtons (N). The tree does not move. What is the amount of force exerted by the tree on the student?
25 N
True or False: On the final exam, you can answer every question in one sentence or less, and there is no need to write beyond what the question is directly asking.
True