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WorksheetsFall Semester Review
Total questions: 45
Worksheet time: 45mins
A laboratory gets some of its electricity from solar cells that lie on the flat rood of the building. Which single design would most increase the overall efficiency of the solar cells?
Add solar cells.
Turn cells to face the sun.
Place cells at a slant.
Reflect from other cells.
Bats use echolocation to hunt for food. Echolocation depends on the constant speed of sound and -
Reflecting from walls
Refracting from walls
Time
Space
What is the current in a copper wire that has a resistance of 2.5 ohms and is connected to a 12-volt electrical source?
2.8 amps
2.8 volts
4.8 volts
4.8 amps
The bending of a wave when it crosses from one medium to another is called -
Reflection
Diffraction
Refraction
Mirroring
How much gravitational potential energy (GPE) does a 5 kg object have when it is 1 meter off the ground?
49 m
49 J
49 watts
49 s
What type of wave is this?
transverse
standing
longitudinal
diffraction
Three identical resistors are connected in series to a battery and a current of 12 A flows from the battery. Which diagram represents the circuit?
Equal drops of red food coloring are added to two cups of water. One cup is very hot, and the other is ice-cold. The color spreads faster in the very hot water. The color spreads faster due to —
compression
condensation
conduction
convection
A device that converts mechanical energy to electrical energy is a(n) —
switch
transformer
electrical motor
electrical generator
A metal spoon placed in a cup of hot cocoa becomes hot. Which process transfers heat from the bowl of the spoon to the handle?
conduction
convection
evaporation
radiation
When two electromagnets are placed close together, the electromagnets each exert a force that can either pull them together or push them apart. This repulsion or attraction between the poles of the two electromagnets is called —
a north pole
magnetic field
electromagnetism
magnetic force
Which of the following will increase as a material is heated and changes temperature?
the kinetic energy of the molecules
the potential energy of the molecules
the charge of molecules
the mass of molecules
In the roller coaster diagram, choose the order which indicates increasing potential energy of the cart.
A,B,C,D
B,C,A
B,C,D,A
A,D,C,B
How much force is needed to accelerate a 1,800 kg car at a rate of 1.5 m/s2 ?
1200 N
2700 N
8493 N
16,562 N
A lizard lies in the sun to regulate its body temperature. Which form of heat transfer allows the sun to warm the lizard?
radiation
conduction
convection
no heat will transfer
A boy on ice skates is standing in the middle of an ice rink. He throws a football in the direction shown below.
What will be the direction of the boy's motion after the throw?
Which of the following is NOT an example of acceleration?
starting from rest and moving forward
slowing to a stop
moving along a curve at a constant rate of 23 km/hr
moving in a straight line at a constant rate of 23 km/hr
A .63kg ball is moving at 4.3 m/s. What is the momentum of the ball?
0.15 kgm/s
2.7 kgm/s
4.9 kgm/s
6.8 kgm/s
Solar collectors on the roof of a house are most beneficial to home owners because they —
add roof material to the house
can power a car near the house
can heat water for the house
add maintenance to the house
A car traveled 240 km in 3 hours. What was its average speed in km per hour?
80 km/hr
40 km/hr
120 km/hr
240 km/hr
Which of the following factors would have the greatest effect on the strength of the electrical force between two objects?
mass of the objects
distance between the objects
atmospheric pressure on the objects
gravitational field between the objects
A cart travels up a ramp from point A to point B as shown below. The cart is traveling at constant speed, v.
As the cart travels from A to B, the gravitational potential energy —
increases as kinetic energy decreases
remains constant as kinetic energy decreases
increases as kinetic energy remains constant
remains constant as kinetic energy remains constant
Two objects of the same charge are held 20 cm away from each other. The object’s distance is changed to 10 cm. What will happen to the objects?
The objects will repel each other stronger than they had.
The objects will repel each other weaker than they had.
The objects will attract each other stronger than they had.
The objects will attract each other weaker than they had.
One advantage a 1.5 V rechargable battery has over a 1.5 V disposable battery is that it —
costs less
is readily available
produce more energy
can be used several times
The graph below shows the potential energy and kinetic energy of a falling rock at a single point in time.
If energy is conserved and there is no air resistance, which graph best shows the potential and kinetic energy at a later time in the rock's fall?
Which piece of glassware can be used with the greatest accuracy to measure volume?
test tube
graduated cylinder
flask
glass beaker
The loudness of a sound wave is determined by the____of the wave.
amplitude
wavelength
speed
frequency
A student measures the volume of a rock by immersing it in water. Which is the best estimate for the volume of the rock?
100 mL
200 mL
150 mL
50 mL
Which of the following sounds has the longest wavelength?
guitar at 170 Hz
thunder at 80 Hz
male voice at 510 Hz
opera singer at 2000 HZ
Sound waves are examples of which type of wave?
longitudinal waves
transverse waves
electromagnetic waves
seismic waves
The car in the picture looks black because it —
absorbs all light
emits black light
transmits all light
reflects black light
An insulator is a substance that resists the flow of heat. The substance that BEST fits this description is —
metal
glass
styrofoam
paper
A circuit described as closed —
requires little voltage
is off
has little resistance
allows electricity to flow
In many energy conversions, energy is "wasted" or converted into:
chemical energy
mechanical energy
electrical energy
thermal energy
If a car is making a turn at a high rate of speed, which of the following forces is necessary to safely stay on the road?
friction
gravity
momentum
inertia
Which of the following situations represents decreasing potential energy?
A girl stretches a horizontal spring.
A bicyclist rides up a steep hill.
A boy jumps down from a tree limb.
A rocket rises vertically from Earth.
A model rocket is powered by an inflated balloon as shown below. When the air in the balloon is released, the rocket will move forward. Which of the following statements is the best example of Newton's third law of motion in this situation?
The rocket changes its inertia as air is released.
The rocket's mass is equal to the force of the air released.
The rocket's mass is equal to the gravitational force.
The rocket moves in the direction it is being pushed.
During a storm, a student sees a rock fall from a cliff and smash into another rock below. Which of the following is an application of Newton's Second law of Motion?
The gravitational attraction of Earth initially pulled the rock toward the ground.
The mass of the rock is related to the force with which it hit the ground.
The ground and the rock exerted equal and opposite forces on each other.
The rock's inertia is increased on collision.
A motorcycle travels at 6.0 m/s. After 3.0 seconds, the motorcycle travels at 15.0 m/s. Which of the following was the average acceleration of the motorcycle?
2 m/s2
3 m/s2
5 m/s2
7 m/s2
A student uses a balance to find the mass of a block of wood. What is the mass of the block?
48.5 g
148.5 g
485 g
1,485 g
A fan was set on a table next to a stack of cards. The fan was turned on to Low and then to High, blowing some of the cards off the table. Which of these statements is the best example of Newton's First law of motion in this situation?
The cards are acted upon by an unbalanced force from the fan.
The cards accelerated due to the force of the fan.
The cards exerted an equal force on the air blown by the fan.
The cards were the lightest were blown the farthest.
Which of the following is the best estimate of the volume of liquid in the graduated cylinder?
4.80 mL
4.90 mL
5.15 mL
5.25 mL
During an experiment, the student wanted to see which color of plastic placed around the plant would cause the most growth. He chose blue, green, pink, and clear wrap. What is the independent variable in this experiment?
growth of the plant
amount of water
color of plastic wrap
color of the plant
Three resistors of 12 ohms, 12 ohms, and 6 ohms are connected in parallel. The combination is connected to 12 V battery. Which is the current through the 6 ohms resistor?
1 A
2 A
3 A
4 A
Which of the following best describes how nuclear reactions are used to generate electricity?
Nuclei produced in reactions generate electromagnetic waves.
Heat from fission is used to produce steam, which drives a turbine.
Splitting nuclei give up their electrons, when they flow through wires.
Light from fission is captured by photocells, which produce electricity.
