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 9
Define magnetic declination.
Describe how the Earth's magnetic field helps migratory animals.
Describe what happens to a compass needle at the magnetic equator.
Describe what is meant by 'magnetic inclination' or 'dip'.
Explain the difference between the magnetic equator and the geographic equator.
Explain why compasses do not always point exactly to the geographic north pole.
If a compass is placed at the magnetic south pole, in which direction will the needle point?
If the magnetic declination at a location is 10° east, in which direction should a navigator adjust their compass reading to find true north?
What is the approximate angle of inclination (dip) of the Earth's magnetic field at the magnetic equator?
(1) 0°
(2) 45°
(3) 90°
(4) 180°
What is the typical range of Earth's magnetic field strength at the surface?
(1) 0.25 to 0.65 gauss
(2) 2.5 to 6.5 gauss
(3) 25 to 65 gauss
(4) 250 to 650 gauss
Which layer of the Earth is mainly 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 north pole?
(1) Vertically upward
(2) Vertically downward
(3) Horizontally northward
(4) Horizontally southward
Fill in the blank: A compass needle aligns itself with the Earth's _______ field.
Fill in the blank: The Earth's magnetic field acts like a giant _______ bar magnet.
Fill in the blank: The Earth's magnetic field lines emerge from the _______ magnetic pole and enter the _______ magnetic pole.
Fill in the blank: The process of the Earth's magnetic field changing direction is called magnetic _______.
True or False: The Earth's magnetic field can reverse its polarity over geological time scales.
True or False: The Earth's magnetic field extends far into space.
True or False: The Earth's magnetic field helps protect satellites from solar radiation.
True or False: The Earth's magnetic field is only important for navigation and has no other effects.
