Magnetic Fields 1.5-2.2

Front

What do magnetic field lines represent?

Back

Magnetic field lines represent the magnetic force around magnets and the earth.

Front

Why do compasses work?

Back

Compasses work because the earth is a magnet with a molten iron core that creates a magnetic field around the earth.

Front

What happens when opposite poles of magnets are brought together?

Back

Opposite poles attract each other.

Front

What happens when like poles of magnets are brought together?

Back

Like poles repel each other.

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion.

Front

How does speed affect kinetic energy?

Back

The kinetic energy increases as the speed increases.

Front

What is a magnetic field?

Back

A magnetic field is the area around a magnet where magnetic forces can be detected.

Front

What is the source of the Earth's magnetic field?

Back

The Earth's magnetic field is generated by the molten iron in its outer core.

Front

What is the role of magnetic poles?

Back

Magnetic poles are the regions of a magnet where the magnetic force is strongest.

Front

What is the difference between a permanent magnet and an electromagnet?

Back

A permanent magnet maintains its magnetic properties, while an electromagnet's magnetism can be turned on and off with electricity.