Review
Which of the following describes a change in motion?
A. A car parked at a stop sign
B. A car speeding up
C. A car staying in the same lane at the same speed
D. A car turned off
B. A car speeding up
If a lightbulb glows brightly in a circuit, what does that tell you about the material in the circuit?
A. It is an insulator
B. It blocks electricity
C. It is a conductor
D. It has no charge
C. It is a conductor
What material would be a poor conductor for completing an electrical circuit?
A. Steel
B. Copper
C. Aluminum
D. Rubber
D. Rubber
What happens to pitch when sound vibrations get faster?
A. Pitch gets lower
B. Pitch stays the same
C. Pitch gets higher
D. Sound stops
What type of energy is stored in gasoline?
A. Sound
B. Light
C. Chemical
D. Mechanical
C. Chemical
When a light shines straight at a regular (flat) mirror, what happens?
A. A light passes through the mirror
B. A light bends sideways
C. The light bounces back toward the flashlight
D. The light disappears
C. The light bounces back toward the flashlight
Why do scientists repeat experiments?
A. To make results confusing
B. To waste materials
C. To make sure results are reliable
D. To change the hypothesis
C. To make sure results are reliable
Why is it important for scientists to repeat an experiment under the same conditions?
A. To change the outcome
B. To prove the experiment is difficult
C. To make sure results are reliable
D. To avoid collecting data
C. To make sure results are reliable
In a fan, the energy transforms from electrical to what?
A. Sound
B. Light
C. Thermal
D. Mechanical
D. Mechanical
Which type of energy is stored in food?
A. Mechanical
B. Sound
C. Chemical
D. Light
C. Chemical
What happens when a switch in a circuit is closed?
A. Electricity stops flowing
B. Electricity flows through the circuit
C. The battery turns off
D. Nothing changes
B. Electricity flows through the circuit
Two balloons have a negative (-) charge. What will they do?
A. Attract
B. Repel
C. Stick together
D. Lose their charge
B. Repel
Which object shows potential energy?
A. A rolling skateboard
B. A flying airplane
C. A stretched Rubber band
D. A spinning fan
C. A stretched rubber band
What type of energy is energy of motion?
A. Potential
B. Kinetic
C. Chemical
D. Heat
B. Kinetic
What example shows mechanical energy?
A. Thunder
B. A rolling marble
C. A glowing light bulb
D. A battery
B. a rolling marble
Why does an open switch stop electricity?
A. There is no battery
B. The circuit is incomplete
C. The bulb is broken
D. Electricity only flows upward
B. The circuit is incomplete
If two hanging metal objects move away from each other, what must be true?
A. They have opposite charges
B. They have the same type of charge
C. One has no charge
D. They are magnets
In a toaster, the energy transforms from electrical to what?
A. Thermal
B. Mechanical
C. Sound
D. Chemical
A. Thermal
Which example shows energy being used to cause change?
A. A book sitting on a shelf
B. A ball rolling down a ramp
C. A Rock resting on the ground
D. A chair not moving
B. A ball rolling down a ramp
In a lamp, the energy transforms from electrical to what?
A. Thermal
B. Light
C. Chemical
D. Potential
B. Light
Which material would BEST be used to allow electricity to flow?
A. wood
B. plastic
C. copper
D. rubber
C. copper
Why does hair stand up when you remove a wool hat?
A. The hair becomes magnetized
B. the hair forms a circuit
C. The hair strands get the same charge and repel
D. The hair loses all charge
C. The hair strands get the same charge and repel
Which energy is caused by vibrations?
A. Light
B. Sound
C. Thermal
D. Chemical
What is Mr. Watkins favorite team?
A. Chargers
B. Gators
C. Hurricanes
D. None
B. GO GATORS!!!!!!!
A circuit would work without a power source?
A. True
B. False
B. False
Must always have a power source like a battery