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 10
Describe how a compass works in relation to the Earth’s magnetic field.
Describe the difference between magnetic declination and magnetic inclination.
Describe the role of the magnetosphere in protecting the Earth.
Explain how the study of the Earth’s magnetic field helps in understanding plate tectonics.
Explain the term ‘magnetic inclination’ or ‘dip’.
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.
Explain why the magnetic north pole is not fixed and changes its position over time.
The Earth’s magnetic field is similar to the field produced by which of the following? (1) A bar magnet, (2) An electric bulb, (3) A battery, (4) A resistor
What is the approximate value of the Earth’s magnetic field strength at the surface? (1) 0.5 Gauss, (2) 50 Gauss, (3) 500 Gauss, (4) 5000 Gauss
Which instrument is used to measure the direction and strength of the Earth’s magnetic field? (1) Barometer, (2) Magnetometer, (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
Fill in the blank: The angle between the geographic north and the magnetic north at a place is called _______.
Fill in the blank: The angle of dip at the magnetic equator is _______.
Fill in the blank: The area around the Earth where the magnetic field interacts with the solar wind is called the _______.
Fill in the blank: The Earth’s magnetic field is essential for the operation of _______ instruments used in navigation.
State whether the following statement is true or false: The Earth’s magnetic field can be detected in rocks formed millions of years ago.
State whether the following statement is true or false: The Earth’s magnetic field has reversed its polarity several times in the past.
State whether the following statement is true or false: The Earth’s magnetic field is used by some animals for navigation.
State whether the following statement is true or false: The Earth’s magnetic field protects us from harmful solar radiation.
