Earth’s Magnetic Field
Physics ⇒ Earth and Space Physics
Earth’s Magnetic Field starts at 8 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Earth’s Magnetic Field.
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See sample questions for grade 11
A student measures the magnetic declination at their location to be 10° east. What does this mean?
Describe one way in which animals use the Earth's magnetic field for navigation.
Describe the dynamo effect in the context of Earth's magnetic field.
Describe what is meant by 'magnetic inclination' or 'dip'.
Explain how paleomagnetism provides evidence for plate tectonics.
Explain why the Earth’s magnetic field is often compared to that of a bar magnet.
A student measures the magnetic declination at their location to be 10° east. What does this mean?
A satellite in low Earth orbit passes through the South Atlantic Anomaly, a region where the Earth's magnetic field is significantly weaker. Explain the potential risks this poses to the satellite and its instruments.
If the magnetic inclination at a certain location is 0°, where is this location most likely to be?
(1) At the magnetic equator
(2) At the magnetic North Pole
(3) At the geographic South Pole
(4) At the geographic North Pole
Which layer of the Earth is primarily responsible for generating the magnetic field?
(1) Crust
(2) Mantle
(3) Outer core
(4) Inner core
Which of the following best describes the direction of Earth's magnetic field lines at the magnetic equator?
(1) Vertical
(2) Horizontal
(3) Random
(4) Circular
Which of the following best describes the source of Earth's magnetic field?
(1) The movement of molten iron and nickel in the outer core
(2) The rotation of the Earth's crust
(3) The gravitational pull of the Moon
(4) The presence of magnetic rocks in the mantle
A compass needle points towards the magnetic ________ pole of the Earth.
The angle between the geographic north and the direction pointed by a compass needle at a given location is called ________.
The Earth's magnetic field can be approximated by the field of a ________ dipole.
The Earth's magnetic field lines emerge from the ________ magnetic pole and enter the ________ magnetic pole.
True or False: The Earth's magnetic field has always pointed in the same direction throughout geological history.
True or False: The Earth's magnetic field is essential for the existence of auroras.
True or False: The Earth's magnetic field is static and does not change over time.
True or False: The geographic North Pole and the magnetic North Pole are located at the same place.
