Show:
ELECTRICITY
MAGNETISM
LIGHT ENERGY
THERMAL ENERGY / HEAT TRANSFER
SOUND ENERGY
100
Tara rubs a balloon on her hair and charges both the balloon and her hair. This happens when she holds the balloon close to her hair.
What is "the balloon and her hair are attracted to each other?"
100
As in the case of electric charges, like magnetic poles have this effect on each other.
What is "repel?"
100
EM waves… a). need a medium to travel b). travel at the speed of sound c). consist of longitudinal waves d). are made from changing electric and magnetic fields
What is "d). are made from changing electric and magnetic fields."
100
Heat is transferred in a vacuum by this process.
What is "radiation?"
100
Because its particles vibrate back-and-forth along the paths that sound travels, sound is classified as this type of wave.
What is "longitudinal wave?"
200
Which copper wire has the least resistance? a). a short, thin wire. b). a short, thick wire. c). a long, thin wire. d). a long, thick wire.
What is "b. a short, thick wire?"
200
This device (illustrated on the right) is a current carrying wire wrapped around an iron core
What is an "electromagnet?"
200
The amplitude of the wave above is __________ cm.
What is "2 cm?"
200
Which of the following is a good conductor of thermal energy? a). animal fur b). cloth potholder c). copper tea kettle d). foam insulation
What is "(c). copper tea kettle?"
200
At the same temperature, in which medium does sound travel fastest? a). empty space c). liquids b). gases d). solids
What is "(d). solids?"
300

What method is involved when a charged object is used to rearrange charges in a metal object without making direct contact?                                             a).  Friction                      c).  induction

b).  Convection                 d).  Conduction

What is " c).  induction"

300
Suggest two ways to increase the strength of an electromagnet.
What is "(1) increase the voltage, (2) increase the number of loops of wire, or (3) use a more ferromagnetic core."
300
Allie noticed that a stick she placed in a pond appeared to be broken at the point entering the water. What wave interaction in the water caused this?
What is "refraction?"
300
When Joe put a cheeseburger sealed in a plastic bag into the microwave, there wasn’t much air in the bag. After the burger was cooked, the plastic bag was full of air. The air came from... a). - the fan in the microwave b). - out of the cheeseburger c). - the air in the bag that expanded as it was heated. d). - from a chemical reaction where energy from the microwave creates oxygen molecules.
What is (c) the air in the bag expanded as it was heated?
300
The pitch heard by a listener as an ambulance approaches will be higher because of this change in the wavelength of the sound being produced.
What is "the wavelength decreases?" (or frequency increases)
400

Negative charges moving in a wire make up _______________ and provide energy to the things that you use each day.


What is "electric current?"

400
This device rotates a coil of wire in a magnet to change electrical energy into mechanical energy. a). a motor c). a reactor b). a battery d). a generator
What is " )a). a motor
400
White opaque objects- such as copy paper - appear white because all the colors of light are… a). diffracted c). absorbed. b). transmitted. d). reflected.
What is (d). reflected?
400
A lava lamp contains two liquids that do not mix. When the lamp is turned on, its base will heat the liquids at the bottom of the container, causing them to rise and sink because of this process.
What is "convection?"
400

Lexus is conducting an experiment about diffraction.  Which of the following hypotheses could he test in order to learn more about diffraction?                                                         a).  Sound waves will bounce off of objects.         b).  Sound waves will bend as they move air to steel.                                                             c).  Sound waves will pass through different media at different speeds.                                 d).  Sound waves will bend as they pass through a small opening.


What is "d).  Sound waves will bend as they pass through a small opening."

500

If you hold a negatively charged plastic rod up to a balloon on a thread, and the balloon moves away from the rod, then the balloon  _______.

A)  has no charge.                                               B)  has no matter.                                               C)  is positively charged.                                     D)  is negatively charged.

What is "D)  is negatively charged."

500
At GA Power, this device converts mechanical energy into electrical energy by moving a magnet near a coil of wire. a). electric motor b). electric generator c). electromagnet d). thermal conductor
What is "b). electric generator?"
500
Which of the following is a TRUE about the lens of the eye? a) It forms a right side up image. b) It focuses light on the retina. c). It reflects light away from the pupil. d). It is thinnest in the middle.
What is "(b) It focuses light on the retina?
500
Brian uses a steel wrench on a sunny day and leaves it on the concrete. The wrench gets hot b/c heat transferred from ? a). the concrete to the wrench. b). the wrench to the air. c). the bicycle to the wrench. d). the wrench to the concrete.
What is "(a). the concrete to the wrench?"
500
This graph above represents the sound that has the lowest pitch.
What is "graph 2?" (has the lowest frequency/ longest wavelength)