Download Unit 4 Study Guide Answer Key

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Unit 4: Forces at a Distance
Learning Targets
Activity
Reflection
How am I doing on
this?
I can distinguish the
relationship between
electricity and magnetism
I can describe the
interaction between like
and unlike charges in both
electricity and magnetism.
I can explain using data
how factors such as
magnitude and distance
impact electric and
magnetic forces
I can explain using data
how factors such as
magnitude, distance and
mass impact the force of
gravity in various scenarios.
What is electricity? What is magnetism? How are electricity and
magnetism related?
Electricity (Electric Force)- is the attraction and repulsion between
electric charges
Magnetism- is the attraction and repulsion between magnetic materials.
The relation between electricity and magnetism- Moving electric charges
will create a magnetic field. The movement of a magnet can create
electricity. When the forces combine together they create what is called
an electromagnet.
Fill in the blanks below.
Like charges REPEL while unlike charges ATTRACT
Draw a model of like charges interacting
What is magnitude?
Magnitude is related to the strength of the force. The stronger the
magnitude the stronger the force (this is simple terms) to bump it up
magnitude is dependent on the net forces exerted on an object. This net
force is dependent of the acceleration and the mass of the object.
What is the difference between static electricity and current
electricity?
Static electricity is when charges build up on an object but they do
not flow continuously. While current electricity is when the
electricity flows from point A to point B.
How is earth like a magnet? Draw an example.
The Earth’s inner core and outer core rotate around each other making
the earth a giant electromagnet. This spinning causes a magnetic
atmosphere that pushes magnetic particles from space around the earth.
This magnetic field is also what’s in charge of the aurora borealis
Draw a model of opposite charges interacting
What is an electromagnet? Give an example and draw an
electromagnet with labels and describe how it works.
An electromagnet is a magnet where an electric current runs
through it. When using a battery the greater the number of coils
around the battery, the stronger the electromagnet becomes. The
strength can also increase due to the amount of voltage.
What does the gravitational pull on earth look like? Does mass or
weight have an effect on the gravitational pull? Explain in detail.
Earth’s gravitational field is always pulling objects
towards earth. This force acts at a distance and is
always attractive. The greater the mass of an object
the greater the pull. Also the closer an object is to the
center of the earth, the great the pull is as well. This is
why you may weigh less in a higher city or building
than on the coast.