Magnetic Fields 1.5

Open Ended

Why do you think studying magnetic fields and magnetic lines is important for understanding our planet?

Multiple Choice

Which of the following is most likely influenced by Earth's magnetic field?

• The direction a compass points

• The color of the sky

• The amount of rainfall

• The phases of the moon

Multiple Choice

What happens to the compass needle as you move the compass around a magnet?

• The compass needle always points north.

• The compass needle points in random directions.

• The compass needle aligns with the magnetic field lines.

• The compass needle always points south.

Open Ended

Why is it important for scientists to analyze magnetic field line diagrams when investigating spacecraft launches?

Multiple Select

Which of the following claims could explain why the spacecraft went faster than expected on Wednesday?

• The magnets were misaligned on Tuesday.

• Much more energy was in the launcher system on Wednesday than on Tuesday.

• The magnetic force was much stronger on Wednesday than on Tuesday.

• The spacecraft was lighter on Wednesday.

Open Ended

Explain how the alignment or misalignment of magnets in a launcher system could affect the speed of a spacecraft.

Open Ended

Based on the diagrams, what is the difference between aligned and misaligned magnets in terms of their field lines and interaction?

Fill in the Blanks

A magnetic field line represents the strength and

of a magnetic field.

Multiple Choice

How does a compass help you determine direction using Earth's magnetic field?

• By showing the position of the sun

• By aligning with Earth's magnetic field lines

• By pointing towards the nearest mountain

• By detecting water sources

Open Ended

How are magnetic field line models helpful?

Fill in the Blanks

The space around a magnet in which magnetic forces can act on objects is called a

.

Multiple Choice

Which of the following best describes a magnetic field line?

• A line that connects opposite magnetic poles and represents the strength and direction of the magnetic field

• A line that shows the path of electric current

• A line that marks the boundary of a magnet

• A line that indicates temperature changes

Open Ended

How can you tell whether two magnets will attract each other, repel each other, or both?

Open Ended

What do magnetic field lines look like when two magnets attract each other?

Open Ended

What do magnetic field lines look like when two magnets repel each other?

Fill in the Blanks

Magnetic field lines always start at the ___ pole of a magnet and end at the ___ pole.

Multiple Choice

Which of the following actions should you take to observe magnetic field lines using the simulation?

• Turn on Field Lines toggle and drag two bar magnets onto the screen

• Only drag one bar magnet onto the screen

• Press RUN without arranging magnets

• Turn off Field Lines toggle

Open Ended

When two magnets are repelling, where do the field lines start and end?

Multiple Choice

Which symbol is used to represent a magnetic field line in the Modeling Tool?

• A straight line

• A curved line

• A dotted line

• A zigzag line

Multiple Select

Select all statements that correctly describe magnetic field lines around magnets.

• Magnetic field lines start at the north pole and end at the south pole.

• Magnetic field lines never cross each other.

• Magnetic field lines are strongest where they are closest together.

• Magnetic field lines can be straight or curved depending on the magnet's shape.

Multiple Choice

What is the purpose of adding magnetic field lines to models of systems of magnets?

• To show the direction of motion of magnets

• To indicate the strength of magnets

• To revise models and show changes in thinking

• To label the poles of magnets

Open Ended

How can you use field lines to tell that two magnets will attract? How about to tell that two magnets will repel? How about to tell that the magnets will both repel and attract?

Fill in the Blanks

Magnetic lines are also known as magnetic

.

Open Ended

What questions do you still have about magnetic lines after today's lesson?