WorksheetsScience Final Review
Total questions: 25
Worksheet time: 16mins
What happens when someone lets go of the button on an electric doorbell?
The electromagnet gets stronger.
The circuit is broken and the electromagnet turns off.
The current moving through the circuit changes direction.
The metal striker hits the bell.
A magnet placed against the wall of a metal shed falls to the ground, where it attracts a nail. What is the most likely explanation for this observation?
The wall is the opposite pole from the magnet.
The shed is not made of iron or steel.
The magnet is not magnetized.
The nail pulled the magnet to the ground.
A circuit contains two light bulbs connected in parallel. What would happen to the brightness of each light bulb if two more light bulbs were added in parallel to the first ones?
The brightness of each bulb would decrease because the total resistance of the circuit would decrease.
The brightness of each bulb would increase because the total resistance of the circuit would increase.
The brightness of each bulb would remain the same even though the total resistance of the circuit would decrease.
The brightness of each bulb would remain the same even though the total resistance of the circuit would increase.
A flashlight has a resistance of 2.4 Ohm . What voltage is applied by the batteries if the current in the circuit is 2.5 A? V = I x R
6.0 V
4.9 V
1.0 V
0.96 V
Briana builds a circuit that has a resistance of 8.0 Ohm . What voltage should she apply to have a current of 0.8 A? V = I x R
7.2 V
0.10 V
10 V
6.4 V
Which best describes a difference between electric current and static electricity?
Static electricity involves the movement of electrons, and electric current involves the movement of protons.
Electric current involves the movement of electrons, and static electricity involves the movement of protons.
Static electricity is continuous, and electric current is not continuous.
Electric current is continuous, and static electricity is not continuous.
A circuit is a path along which electric current flows. How would changing the battery in a circuit from 9 volts to 1.5 volts most likely affect the circuit?
The resistance in the circuit would decrease.
More electric charge would flow in the circuit.
The resistance in the circuit would increase
Less electric charge would flow in the circuit.
Which best compares AC and DC?
AC is used only in generators, and DC is used only in motors.
AC flows in one direction, and DC repeatedly switches direction.
DC flows in one direction, and AC repeatedly switches direction.
DC is used only in generators, and AC is used only in motors.
Two objects are held close together. When they are released, they move toward one another. Which conclusion is supported by this evidence?
The objects have no charge.
The objects have opposite charges.
The objects are both positively charged.
The objects are both negatively charged.
Which change will decrease the electric force between two positively charged objects?
adding neutrons
removing electrons
moving them closer together
moving them farther apart
Samantha is observing a salt crystal under a microscope. She wants to view more details by enlarging the image of the crystal. Which would allow her to do this?
increasing the strength of the objective lens
decreasing the strength of the objective lens
decreasing the amount of light that shines on the crystal
increasing the amount of light that shines on the crystal
Which best explains how fiber-optic technology benefits the field of medicine?
It helps surgeons make cuts that are smaller and less painful than traditional methods.
It helps surgeons make more accurate repairs to broken blood vessels.
It allows doctors to view internal body structures to help them diagnose illnesses.
It allows doctors to magnify cells so they can identify unhealthy cells that cause cancer.
Which is one characteristic shared by electromagnetic and mechanical waves?
Both have a crest and a trough.
Both move due to particles bumping into each other.
Both are formed by charged particles.
Both occur as a result of a disturbance.
Which object reflects light with the longest wavelength?
a violet flower
a blue paper
a yellow book
a green leaf
Which types of electromagnetic waves have frequencies that are higher than those of ultraviolet light but lower than those of gamma rays?
infrared light
microwaves
radio waves
X-rays
Which type of electromagnetic waves make up the colors of a rainbow seen after a storm?
visible light
infrared light
X-rays
ultraviolet light
What happens to the sound wave in echolocation?
It is refracted
It releases energy
It is absorbed
It is reflected
Finley is trying to transmit a sound wave that will travel continuously, but he is frustrated by the excess noise. What kind of signal is Finley sending?
digital
infrared
analog
radio
Which best describes what is required for any sound wave to travel?
solid
liquid
empty space
any medium
Which would increase the speed of a sound wave?
A wave passes from a liquid to a gas while remaining the same temperature.
The medium decreases in temperature while remaining in the same phase.
A wave passes from a solid to a liquid while remaining the same temperature.
The medium increases in temperature while remaining in the same phase.
Jerimiah is studying Wave A and Wave B. What can be predicted about the waves if they were to crash into each other?
Refraction would occur.
Interference would occur.
The resulting wave would travel at 4.2 hertz.
The crest of Wave A would overlap the trough of Wave B.
Plants appear green because they do not absorb the green wavelengths of light. What happens to those green light waves when they hit a plant?
They are reflected.
The are diffracted.
They are absorbed.
They are refracted.
Farah is doing an experiment that involves calculating the speed of a longitudinal wave. What will most likely happen if she increases the temperature in the room?
The amplitude of the wave will decrease.
The speed of the wave will increase.
The speed of the wave will decrease.
The amplitude of the wave will increase.
Theresa comes up with four examples of waves: Sound wave, Ocean wave, Light wave, and Hand wave. Which of Theresa’s examples is not an actual scientific wave?
Sound wave
Ocean wave
Light wave
Hand wave
Two football players are running toward each other. One football player has a mass of 105 kg and is running at 8.6 m/s. The other player has a mass of 90 kg and is running at -9.0 m/s. What is the momentum of the system after the football players collide?
810 kg · m/s.
93 kg · m/s
903 kg · m/s.
1,713 kg · m/s.
