Another students says that the earth’s magnetic poles have flipped many times in the past. How would you evaluate their statement? Question 18 options:

This is a true statement.

This false because the magnetic field is fixed and cannot change.

This is false because a compass always points at the true North Pole.

This is false because the magnetic field has only flipped once.

True

Explanation:

As a matter of geological record, the Earth's magnetic field has undergone numerous reversals of polarity. We can see this in the magnetic patterns found in volcanic rocks, especially those recovered from the ocean floors. In the last 10 million years, there have been, on average, 4 or 5 reversals per million years.

The two types of microscopes are electron and optical microscopes.

Electron microscopes have a higher magnifying power since it uses lighting technology to do so.

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