Earth’s Magnetic Field
Geography ⇒ Physical Geography
Earth’s Magnetic Field starts at 8 and continues till grade 12.
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See sample questions for grade 9
Describe how the Earth’s magnetic field is useful in navigation.
Describe the difference between the magnetic equator and the geographic equator.
Describe the process of magnetic pole reversal.
Explain how the study of ancient rocks helps scientists understand the history of the Earth’s magnetic field.
Explain the term ‘magnetic declination’.
Explain why a compass needle points towards the north.
Explain why the Earth’s magnetic field is important for life on Earth.
Explain why the Earth’s magnetic field is not perfectly aligned with its rotational axis.
What is the approximate angle between the Earth’s magnetic axis and its rotational axis? (1) 0° (2) 11° (3) 45° (4) 90°
Which instrument is used to detect the direction of the Earth’s magnetic field? (1) Barometer (2) Compass (3) Thermometer (4) Seismograph
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 shape of the Earth’s magnetic field? (1) Circular (2) Elliptical (3) Dipolar (4) Linear
Fill in the blank: The Earth’s magnetic field is also known as the ________ field.
Fill in the blank: The Earth’s magnetic field is similar to that produced by a ________ magnet.
Fill in the blank: The Earth’s magnetic field is strongest at the ________ and weakest at the ________.
Fill in the blank: The Earth’s magnetic field lines are ________ inside the Earth and ________ outside the Earth.
State whether the following statement is true or false: The Earth’s magnetic field can be detected using a simple bar magnet.
State whether the following statement is true or false: The Earth’s magnetic field is essential for the functioning of modern navigation systems.
State whether the following statement is true or false: The Earth’s magnetic field is generated by the movement of solid iron in the inner core.
State whether the following statement is true or false: The Earth’s magnetic field is permanent and unchanging.
