Font size
WorksheetsUnit 5: Electric, Magnetic, and Gravitational forces
Total questions: 36
Worksheet time: 14mins
What forces works by combining electric and magnetic forces?
Electric
Magnet
gravitational
Electromagnetism
On the electromagnetic spectrum: What has the highest frequency and energy?
radio waves
gamma rays
microwaves
infrared waves
X-rays
On the electromagnetic spectrum: What has the lowest frequency and energy?
radio waves
gamma rays
microwaves
infrared waves
X-rays
Which electromagnetic wave was used to produce the image?
radio waves
gamma rays
microwaves
infrared waves
X-rays
Earth's gravity pulls objects toward the___
Center of the sun
Center of the moon
Center of the Earth
Center of the Solar System
What factors affect the strength of the gravitational force between objects?
mass
distance
weight
both mass and distance
Answer the question using the image. The force of gravity is strongest between the objects in row____.
Row A & B because they are both the same distance
Row A & B because they both have objects of equal masses
Row A because they have the same mass
Row B because one of the objects has a greater mass than the other which forms a greater gravitational pull
Answer the question using the image. The force of gravity is weakest between the objects in row____.
Row C because they are closer together
Row C because they have the same mass
Row D because they are farther apart
Row D because they have equal masses
As the orbital period gets longer, the gravitational pull gets stronger
As the mass of the objects decrease, the gravitational pull gets stronger
As the mass of the objects increase, the gravitational pull gets stronger
As the distance between the objects increases, the gravitational pull gets stronger
Scientists suggest that the movement of Earth’s liquid iron core results in electrical currents. These currents would then result in Earth’s magnetic field. Recent satellite data suggest that the strength of Earth’s magnetic field has weakened by about 3.5 percent in some areas. In other areas, Earth’s magnetic field strength has increased by about 2 percent.
Which statement best explains the differences in Earth’s magnetic field strength based on the movement of Earth’s liquid iron core?
The movement of Earth's liquid iron core stopped in both locations
The movement of Earth's liquid iron core changes direction in some locations
The movement of Earth's liquid iron core is the same in all locations
The movement of Earth's liquid iron core increased in speed in both locations
A magnetic compass needle is able to detect the direction of Earth’s magnetic North Pole. Over hundreds of thousands of years, the direction in which a compass needle points would
stay the same
change
During normal polarity period, a compass needle points mostly in the direction of the ----
Geographic North Pole
Geography South Pole
Equator
Prime Meridian
During reversed polarity period, a compass needle points mostly in the direction of the ----
Geographic North Pole
Geography South Pole
Equator
Prime Meridian
Scientists will study how Earth’s magnetic field changes as distance from Earth changes. Satellites will be placed at different distances from Earth and will be used to measure the strength of Earth’s magnetic field.What is the dependent variable in the investigation?
magnetic field strength
distance from Earth
size of satellite
gravitational force of Earth
mass of satellite
Scientists will study how Earth’s magnetic field changes as distance from Earth changes. Satellites will be placed at different distances from Earth and will be used to measure the strength of Earth’s magnetic field.What is the independent variable in the investigation?
magnetic field strength
distance from Earth
size of satellite
gravitational force of Earth
mass of satellite
Which claim about the mass of different objects is best supported by the data in the table?
object 1 has the greatest mass because it is closest to the sun
object 5 has the greatest mass because it has the longest orbital period
object 3 has the greatest mass because it has the largest surface gravity
object 2 has the greatest mass because its orbital period and distance from the Sun are most similar
Atoms that have a positive charge will be attracted to atoms with a ___ charge.
Positive
Negative
Neutral
Which of these forces works only by combining electric and magnetic forces?
Magnetic
Electric
Electromagnetism
Thia force occurs when there is an attractive and repulsive force between two poles.
Magnetic
Electric
Electromagnetism
In a magnet the opposite poles will ---
Repel
Attract
The magnetic field of a magnet is --- further away from the magnet.
stronger
weaker
larger
smaller
Electric charges that do not move through a current are known as ---
Magnetic
electric
electromagnetism
static electricity
The area around an electric charge that experiences the force exerted by the electric charge
Electric field
electric force
electric poles
electric charge
When electrons flow through wires from a -terminal to a + terminal a/an --- is created.
magnet
static charge
current
electromagnet
On the electromagnetic spectrum, which wave length has waves that are longer than the wavelengths of visible light?
xrays
radio waves
gamma rays
ultraviolet waves
If you are in a dark room , are any electromagnetic waves present? Why or why not?
Yes, because not all electromagnetic waves are visible
No, because all electromagnetic waves are visible
What is the source of energy for an electric circuit?
battery
switch
lightbulb
wires
Which two particles attract each other?
2 electrons
2 protons
1 proton & 1 neutron
1 proton & 1 electron
In the figure, which correctly lists energy transformations that take place when the flashlight is turned on?
Chemical→light→thermal
Light→thermal→chemical
Chemical→electrical→light
Chemical→light→electrical
What kind of energy can cause your hair to stand on end after you brush it vigorously?
heat energy
static electricity
magnetism
light energy
study the circuit. If bulb B burned out, what would most likely happen?
Only bulb C would remain lit
the other build would go out
the battery would die
the wire would short-circuit
You and your friends want to have a contest designing your own electric toy cars. You will use the same basic idea in your design as the homemade electric motor below that includes a magnet, a metal screw, a battery, and an insulated wire:Select two of the following questions that you could investigate to ensure the most powerful motor for your toy car.
How does the size of the battery affect the strength of the motor?
How do the materials that the car is made from affect the speed of the car?
How does the strength of the magnet affect the speed of the car?
How does air resistance affect the strength of the motor?
How does the size of the magnet affect the strength of the motor?
Jori was making microwave popcorn and watching it pop. Her grandmother told her not to stand in front of the microwave because it was dangerous. Since Jori had been studying electromagnetic fields in science, she was interested to find out if microwaves really are dangerous. The World Health Organization article, “Electromagnetic fields and public health” states that microwaves cannot emit more than 50 watts of energy per square meter at a distance of 5 cm from the outside of the microwave oven. Electromagnetic fields & public health: Microwave ovens. How can Jori investigate the relationship between the distance from the microwave and the strength of the electromagnetic field (EMF) when she makes popcorn?
Jori can hold an EMF meter at different distances from the microwave while she is making popcorn and take measurements.
Jori can use an EMF meter at 5 cm away from different microwaves while they are being used.
Jori can hold an EMF meter only at the distance she usually stands from the microwave and take measurements while making popcorn.
Jori can put an EMF meter inside the microwave after she pops the popcorn to take measurements.
Which image is an example of an electromagnet?
A
B
Which image represents a magnetic field around a bar magnet?
A
B
C
D
What two things could a person do to increase the strength of an electromagnet?
decrease the loops
increase the loops
decrease current by taking away batteries
increase current by adding batteries
