Earth’s Magnetic Field
Physics ⇒ Earth and Space Physics
Earth’s Magnetic Field starts at 8 and continues till grade 12.
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See sample questions for grade 12
A location has a magnetic declination of 10° east. If a compass points to magnetic north, what is the true geographic direction relative to the compass needle?
Describe how paleomagnetism provides evidence for plate tectonics.
Describe the effect of solar storms on Earth's magnetic field.
Describe the role of the magnetosphere in protecting life on Earth.
Explain the dynamo theory as it relates to the generation of Earth's magnetic field.
Explain why compasses do not work properly near the magnetic poles.
Explain why the Earth's magnetic field is not exactly that of a perfect dipole.
A location has a magnetic declination of 10° east. If a compass points to magnetic north, what is the true geographic direction relative to the compass needle?
Which of the following best describes the source of Earth's magnetic field?
(1) The movement of charged particles in the Earth's core
(2) The Earth's rotation alone
(3) The gravitational pull of the Moon
(4) The presence of iron in the Earth's crust
Which of the following best describes the Van Allen radiation belts?
(1) Regions of intense gravity
(2) Zones of trapped charged particles within the magnetosphere
(3) Layers of the atmosphere
(4) Areas of high temperature in the core
Which of the following best explains why a freely suspended magnet always points in the north-south direction?
(1) Due to Earth's gravitational field
(2) Due to Earth's magnetic field
(3) Due to wind currents
(4) Due to Earth's electric field
Which of the following is a correct statement about the movement of Earth's magnetic poles?
(1) They are fixed and do not move
(2) They move slowly over time
(3) They switch places every year
(4) They are located at the equator
The angle between the geographic north and the direction pointed by a compass at a given location is called ________.
The angle made by the Earth's magnetic field with the horizontal at any place is called ________.
The Earth's magnetic field lines emerge from the ________ magnetic pole and enter the ________ magnetic pole.
The process by which Earth's magnetic field reverses its polarity is known as ________.
State whether the following statement is true or false: The strength of Earth's magnetic field is uniform at all points on the surface.
True or False: The Earth's magnetic field has reversed its polarity many times in the past.
True or False: The Earth's magnetic field is perfectly aligned with its rotational axis.
True or False: The geographic North Pole and the magnetic North Pole are located at the same place on Earth.
