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WorksheetsQ4BM Final Review
Total questions: 54
Worksheet time: 29mins
Which of the following BEST describes the function of a resistor in an electrical circuit?
It opens the circuit.
It creates the electric field.
It controls the amount of current.
It provides energy to the circuit.
A switch that can open or close an electric circuit can be used to
increase the amount of current.
reverse the current’s direction.
stop the current.
accelerate the current
What is the name of a circuit in which the current splits at the junctions?
closed circuit
parallel circuit
series circuit
short circuit
Which labeled element represents a resistor?
P
Q
R
S
The student then realizes that turning off one light turns off all the lights. In order to make it possible for each light to be turned on and off separately, the student should convert the circuit into a
short circuit.
series circuit.
closed circuit.
parallel circuit.
If Bulb 1 burns out, which other bulb(s) will also stop emitting light?
2
3
3 and 4
2,3, and 4
Which statement best describes an ordinary transistor function?
Transistors store surplus current charges.
Transistos stabilize current within a narrow designated range.
transistors act as switches for a large current controlled by a small current.
Transistors show variables resistance to maintain circuit resistance at a set value.
If Bulb 8 burns out, how will the remaining bulbs be affected?
All the remaining bulbs stay lit.
Only bulbs 1 through 4 stay it.
All remainng bulbs go out.
Bulb 4 is the only other bulb to go out.
While organizing a bin of scrap wiring, Rebecca arranges the wires into piles that have the same diameter or gauge. She measures the length and composition of each wire, and compiles her information in the table below. Which piece of scrap wire has the highest resistance?
wire 1
wire 2
wire 3
wire 4
Which one of the following best describes a fuse?
a material that allows current to travel through a circuit.
a material that prevents current from traveling through it easily.
a device taht uses a magnet to protect a circuit from current overloads.
a device that uses a metal strip that melts away when a current becomes overloaded.
The current in a 12.0 Ω resistor is 0.40 amps. What is the voltage drop across the resistor?
30 volts
4.8 volts
1.9 volts
0.033 volts
When measured from the same reference point, which point in the circuit is at the highest voltage?
Point A
Point B
Point C
Point D
Which change to a wire would cause its resistance to decrease?
increase its length
increase its temperatire
increase it diameter
increase its resistivity
Identify the value of the resistor in the circuit.
.48 Ω
130 Ω
2.1 Ω
4.8 Ω
0.25 Ω
4.0 Ω
4.5 Ω
7.5 Ω
One device used for electrical safety involves a metal strip that bends when it gets hot. This bending flips a switch which interrupts the current. What is this device called?
circuit breaker
fuse
electric meter
resistor
A current of 25.0 mA is measured in the circuit below. What voltage must the battery supply?
0.500 V
12.5 V
20.0 V
12,500 V
A device that converts mechanical energy into electricity is a
generator.
meter.
motor.
solenoid.
Temperatures inside Earth are high enough that the mantle consists of molten rock. Convection currents in this rock exert force on the tectonic plates of the crust of Earth, moving them around. Geologists understand that the kinetic energy of tectonic plates represents which of the following?
the loss of an equal amount of energy from the mantle
the increase of energy in the mantle from elastic forces
an addition of twice the amount of energy to the mantle
a replacement of mass in the mantle with energy in the crust
The electromagnetic spectrum shows the wavelength and frequencies of light. How is infrared radiation different from visible light?
It is invisible and has a amplitude lower than visible light.
It is invisible and has a longer wavelength than visible light.
It has a shorter wavelength and lower frequency than visible light.
It has a longer wavelenght and higher frquency than visible light.
Food energy is commonly measured in calories. A food calorie is equivalent to 4180 joules. If a medium banana contains 105 calories, how much energy does the banana contain in joules?
39.8 J
4075 J
4285 J
438,900 J
An ice cube is placed in a sealed insulated container of hot water at 80°C. After five minutes, the ice cube disappears. Which best describes the change that took place inside the container?
Heat energy in the ice cube was dissipated into the hot water.
The total heat energyin the container was reduced by the ice cube.
The hot water lost the same amount of heat energy as the ice cube.
heat energy in the hot water was reduced by kinetic energy in the ice cube.
What is the velocity of a wave with a frequency of 1,000,000 hertz and a wavelength of 10,000 meters?
(1,000,000 Hz)+(10,000 m)
(1,000,000 Hz- 10,000 m)
(1,000,000 Hz + 10,000 m)
(10,000m) x (1,000,000 Hz)
The electromagnetic spectrum includes radio waves, infrared waves, ultraviolet waves, and X rays. Which property is constant in a vacuum for all parts of this spectrum?
frequency
wavelength
period
speed
Two waves travel at the same speed. The frequency of wave A is 1000 Hz, and the frequency of wave B is 4000 Hz. Wavelength A is
one-quater the length of wavelength B.
one-half the length of wavelength B.
equal to the length of wavelength B.
four times the length of the wavelength B.
How does the speed of radio waves compare with the speed of infrared waves?
Radio waves travel faster.
Infared waves travel faster.
They both travel at the same speed.
The wave speed varies with their frequency.
The frequency of a wave is measured in
hertz.
meters.
hertz/ssecond.
meters/minute.
The speed of sound in water at a temperature of 25°C is 1500 m/s. What is the wavelength of a 300 Hz sound wave traveling through water at a temperature of 25°C?
0.083 m
0.20 m
5.0 m
12 m
Sound is able to travel faster in solids than in air because the molecules in a solid are
closer together than air molecules.
more easily moved than air molecules.
moving faster than air molecules.
larger than air molecules.
Humpback whales sing at a maximum frequency of 21.0 kHz and a wavelength of 6.52 cm in seawater. How fast does the humpback whale song travel in seawater?
161 m/s
1369 m/s
3101 m/s
3221 m/s
The formula F=1.8(C)+32 is used to convert temperatures in degrees Celsius to the equivalent temperature in degrees Fahrenheit. Which gives the closest estimate for converting temperatures from degrees Celsius to degrees Fahrenheit?
double the Celsius temperature and add 30
double Celsius termperature and subtract 30
divide the Celsius temperature by 2 and add 30
divide the Celsius temperature by 2 and subtract 30
Which temperature is closest to the temperature shown on the thermometer?
72 °F
77 °F
83 °F
87 °F
If this temperature increases by 30 degrees, what will be the new temperature?
-45 °C
-15 °C
15 °C
45 °C
Students measured the temperature of a pan of water. The thermometer showed the temperature was 20°C. Which of these will increase the temperature of the water the most?
adding salt to the pan of water
stirring sugar into the pan of water
leaving the pan of water in sunlight
shaking the pan of water over the grass
The temperature on a winter day is shown on the thermometer. What is the temperature?
25 °F
28 °F
30 °F
32 ° F
When a student uses the equation, mass multiplied by change in temperature multiplied by specific heat, what is being calculated? Q=m×C×ΔT
a phase change
stored energy
heat convection
heat gain or heat loss
If the mass of each substance were equal, which substance would heat the fastest?
Aluminum
graphite
silver
iron
A student placed four 10.0-gram blocks of metal on a sunny window sill. Which metal took the most time to increase in temperature by 10°C?
Aluminum
Brass
Lead
Zinc
Roger heats a brass metal cube (specific heat = 375 J/kg·°C) to 70.0°C and places the cube into an insulated container of water (specific heat = 4182 J/kg·°C). He observes that the water temperature increases from 10.0°C to a final temperature of 18.0°C. What is the final temperature of the metal cube?
10.0 °C
18.0 °C
35.0 °C
62.0 °C
A student heats a piece of each of the four substances in boiling water for five minutes. Each of these pieces has the same mass. The student then places each piece on a block of wax. Which substance will melt the MOST wax?
Aluminum
Copper
Glass
Iron
Which of the following characterizes the wave nature of sound and light?
sound is a longitudinal (compression) wave and light is an electromagnetic wave
sound is an electromagnetic wave and light is a longitudinal (compression) wave
sound and light are both longitudinal (compression) waves
sound and light are both electromagnetic waves
How does this system compare to the way heat from the core of Earth reaches the surface?
The heater uses convection currents to transfer heat, and Earth’s interior uses radiation.
The heater uses radiation to transfer heat, and Earth’s interior uses conduction.
Both systems use convection currents to transfer heat.
Both systems use conduction to transfer heat.
How is thermal energy transferred during heat conduction within a metal wire?
motion electrons through the wire
transfer of electrons from atom to atom
transfer of kinetic energy between collidind particles
transfer of potential energt between colliding particles
The best example of heat transfer by convection is when
sunlight warms soil.
a ceiling fan blows air.
flames heat up a pan.
heat rises in a chimney.
A wood burning stove is used to heat the air in a small cabin. What types of heat transfer are involved?
conduction and convection
radiant and conduction
radiant and convection
radiant, convection, and conduction
Which picture shows the transfer of heat by conduction?
Which of these is an example of heat insulation?
A person stays warm under a blanket on a cool night.
Air moves from one room to another when a fan blows.
A fire in a fireplace makes a cool room become warm.
Warm air rises from the first floor up to the second floor of a house.
Why does heat transfer by convection occur only in fluid materials, such as gases and liquids?
Convection involves bulk transfer of mass which does not occur in solids.
Convection occurs when particles collide which can only happen in fluids.
Convection is caused by particle vibrations but particles are locked into place in solids.
Convection requires a point source of energy which is only possible in fluids.
Which of the following materials would best slow the transfer of heat?
aluminum
copper
glass
wood
At which temperature does water freeze?
0 degrees Celsius
32 degrees Celsius
100 degrees Celsius
212 degrees Celsius
Which Celsius temperature is closest to 32°F?
0°C
32°C
100°C
212°C
Which Celsius temperature is closest to 212°F?
0°C
32°C
100°C
212°C
Degrees Celsius are related to Kelvins by the formula C=K-273.15 This formula can be rewritten several ways. Select all formulas that are equivalent to the given formula.
C+273.15=K
K-C=273.15
273.15=K+C
K=C-273.15
C-K=273.15
Due to the lower pressure on top of Mt. Everest, water can boil before the temperature gets to 100°C. If pure water begins to boil at 70°C on Mt. Everest, what is this temperature in kelvins?
163 K
343 K
373 K
273 K
