No student devices needed. Know more
60 questions
A comb is rubbed with a piece of wool fabric and placed next to some scraps of paper. The paper moves toward the comb. The movement of the paper is caused by -
chemical energy
magnetic attraction
mechanical energy
static electricity
Which of these materials is a good conductor of electricity?
Rubber
Glass
Newspaper
Metal
Which of these is a good insulator?
Aluminum nail
Copper nail
Aluminum can
Wood
The magnetic fields of any magnet are greatest -
In the center of the magnet
Only at the north pole
Only at the south pole
At both poles
Many electrical wires are wrapped with a plastic coating because plastic is —
Cheaper than metal
A good insulator
Able to keep its shape
More dense than copper
When in operation, this tool transforms electrical energy mostly into -
Chemical energy
Radiant energy
Thermal energy
Mechanical energy
At which point is the magnetic field the weakest?
1
2
3
4
Which form of energy is being used by the toaster?
Solar
Electrical
Chemical
Potential
A class prepared some electric circuits using a battery, connecting wires, and three light bulbs. Which of these circuits can make the three bulbs light?
Which form of energy is best shown in this picture?
Chemical
Solar
Nuclear
Mechanical
Which list shows the energy transformations a space heater undergoes in the correct order?
Chemical-> electrical-> thermal
Mechanical -> thermal -> electrical
Electrical -> mechanical -> thermal
Thermal -> mechanical -> electrical
Benjamin Franklin conducted this famous experiment that showed lightning was -
a movement of air molecules
an electrical discharge
a magnetic field
a glowing chemical
In a thunderstorm the bottom of a cloud carries a negative charge. Why is the lightning attracted to the ground?
The ground carries a neutral charge.
The ground carries a negative charge.
The ground carries a positive charge.
The ground isn't charged.
Michael Faraday showed how electric current in a wire produces -
molecules
a magnetic field
vibration
chemicals
Which of these best completes the circuit?
A leather shoelace
A nail
A rubber band
A wooden toothpick
Thomas Edison is best known for-
Inventing the electric generator.
Discovering lightning.
Improving the light bulb.
Creating the Tesla coil.
Which of these correctly shows what happens when two magnets are placed side by side?
An electric motor is designed to turn electrical energy into -
mechanical energy
chemical energy
potential energy
solar energy
In this picture, the iron filings show the shape of the magnetic -
pole
core
field
axis
In which circuits will the bulb be lit?
A
B
C
D
E
The conveyor belt moves the groceries by transforming electrical energy into -
Radiant
Thermal
Chemical
Mechanical
A student rubbed a plastic comb with a piece of wool cloth and then placed the comb near a stream of water. The water bent toward the comb as shown because of -
Magnetism
Gravity
Static electricity
Inertia
A fifth-grade class constructed this circuit. Which of these objects most likely made the light glow when connected to points X and Y?
Plastic straw
Cotton string
Aluminum foil
Shoelace
Bits of paper are attracted to the surface of this balloon. What attracts the paper pieces to the balloon?
Static electricity
Magnetism
Friction
Drag
Early scientists most likely saw a discharge of electricity for the first time when observing a -
Waterfall
Rainbow
Thunderstorm
Volcano erupting
To make an electromagnet, a conductor should be coiled around -
A glass tube
An iron nail
A straw
A wooden pole
Betty put two bar magnets near each other on a table. Their poles are oriented as shown below. How will the magnets move when Betty lets go of them?
An electromagnet was placed on a surface with iron filings. Which of these pictures shows the pattern of the iron filings around the electromagnet?
The diagram below shows a circuit with three light bulbs.
Light bulb 1 will stay lit, and light bulb 3 will go out.
Light bulbs 1 and 3 will go out.
Light bulbs 1 and 3 will stay lit.
Light bulb 1 will go out, and light bulb 3 will stay lit.
Which picture below contains a functioning simple circuit?
Which picture below contains a functioning parallel circuit?
The table above shows some elements that are very good conductors of electricity. Which conclusion can be made based on the table?
Copper and aluminum are equally good conductors of electricity.
Silver is a better conductor of electricity than copper.
Nickel is a poor conductor of electricity.
Zinc is a better conductor of electricity than aluminum.
Rachel made four electromagnets by winding coils of copper wire around a nail. She connected each end of the wire to a battery to form an electromagnet which she used to pick up paper clips. In this experiment, what kind of energy is changed directly into magnetic energy?
Heat
Electrical
Chemical
Light
Which of the following is not true about parallel circuits?
The circuit stays closed if a bulb is removed.
Buildings are often wired with parallel circuits.
An open parallel circuit will stay lit if energy can still flow in another pathway.
The circuit is open once a bulb is removed.
The strength of an electromagnet is increased when-
there are fewer wraps of wire around the nail
there are more wraps of wire around the nail
there are fewer batteries powering it
there are more switches plugged into the circuit
Both permanent magnets and electromagnets -
attract objects made of iron and can be turned off and on
are created by electrical currents and cannot be turned off and on
create a magnetic field and attract objects made of plastic
create a magnetic field and attract objects made of iron
Which picture shows a circuit of light bulbs in series?
Why will a compass needle move when it is placed near an electric circuit?
An electric current produces a gravitational field.
Metal wires have a magnetic field around them.
The magnetic needle of the compass is attracted to the battery.
An electric current produces a magnetic field.
What is the magnetic field?
The end of a magnet
The north pole of one magnet and the south pole of another magnet
The whole magnet
The space around a magnet where the magnetic force is found
When the pathway for electricity to flow is broken, it is a -
series circuit
parallel circuit
open circuit
closed circuit
Useful friction is created by the -
Spokes
Curved handlebars
Brakes
Pedals
Which of these best shows kinetic energy?
A child made a paper airplane and set it on a table. The airplane then has potential energy. What does the child need to do to change the potential energy to kinetic energy?
Launch the airplane in the air
Unfold the airplane
Crumple the airplane
Add paperclips to the airplane
Which of the following statements describes the position of the apple in the picture above?
It is on top of the table.
It is next to the compass.
It is under the table.
It is next to the cloth.
A student was observing the motion of a ball rolling down a hill. Which of the following could the student use to describe the motion of the ball?
Speed
Gravity
Size
Weight
To describe this car’s motion, a student should use its —
volume and speed
mass and volume
direction and speed
direction and color
Which of these has kinetic energy?
Jacob kicks a soccer ball toward the goal. Javier, the goalkeeper, stops it and kicks it back. What is the effect of the forces acting on the ball?
The forces change the ball's -
weight
mass
direction
gravity
On a recent sightseeing trip, a family recorded their average speed after each hour they traveled. They created the graph above from their data. Which of the tables below must have been their data?
A person pushes a box as shown. What is the push most likely to change?
The color of the box.
The mass of the box.
The position of the box.
The size of the box.
A student throws a ball. Which of these best describes the moving ball?
The ball has light energy.
The ball has kinetic energy.
The ball is transferring sound energy to the air.
The ball is transferring light energy to the air.
A bicyclist rides on a flat road and then stops pedaling but does not apply the brakes. The bicycle stops because of -
magnetism
attraction
balance
friction
Which labeled part in this picture has evidence of kinetic energy?
1
2
3
4
An object is traveling north at a speed of 12 kilometers per hour. Which characteristic of the object is being described?
Motion
Matter
Volume
Temperature
What kind of energy do all moving objects have?
Light
Potential
Kinetic
Sound
A student designs an experiment to test the effect of different surfaces on motion. He decides to cover a wooden block with different materials including sandpaper, construction paper, and wax paper. Then he slides the block down a ramp and record its speed. Which hypothesis is worded correctly?
If the material is rougher, then the block's time will be slower.
If the block's time is slower, then the material is rougher.
Smoother material will make the block slide more quickly.
Smoother material will make the block slide more slowly.
Leshawna moved three different boxes. The boxes weighed 3 kg, 5 kg, and 10 kg. Which box required the most force to move?
3 kg
5 kg
10 kg
All were the same
The box would be easier to move if the surface of the ramp was smoother because there would be less -
mass in the box
friction opposing the box
gravity pulling on the box
distance to push the box
In which direction will the ball most likely go after it hits the wall?
Which diagram correctly identifies the force of friction on the box?
Explore all questions with a free account