Week 19 Practice: Geomagnetism (Y)

Front

What are geomagnetic poles?

Back

Geomagnetic poles are points on the Earth's surface where the magnetic field lines are vertical.

Front

What is the core of the Earth made of?

Back

The core of the Earth is primarily made of iron and nickel.

Front

What two components define velocity?

Back

Velocity is defined by both speed and direction.

Front

Is the Earth a magnet?

Back

False, the Earth is not a magnet in the traditional sense, but it has a magnetic field.

Front

Do the magnetic poles move?

Back

False, the magnetic poles are not fixed and do move over time.

Front

What is the difference between geographic poles and geomagnetic poles?

Back

Geographic poles are based on the Earth's rotation, while geomagnetic poles are based on the Earth's magnetic field.

Front

What is the significance of the magnetic field lines being vertical at the geomagnetic poles?

Back

It indicates the direction of the magnetic force at those points.

Front

What materials are found in the Earth's outer core?

Back

The outer core is primarily composed of molten iron and nickel.

Front

How does the Earth's magnetic field protect us?

Back

The Earth's magnetic field protects us from solar winds and cosmic radiation.

Front

What is the relationship between magnetic poles and compass direction?

Back

A compass points towards the magnetic poles, which helps in navigation.