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Mars has a weak magnetic field.
a. True
b. False

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Final answer:

False. Mars has a weak magnetic field compared to the Earth, indicating a molten metallic core with electric currents generating the field.

Step-by-step explanation:

False. Mars has a weak magnetic field.

The presence of a magnetic field is an indicator of a planet's molten metallic core and electric currents generated within it. Mars has a weak magnetic field compared to the Earth. While the Earth has a magnetic field strength of 5 × 10-5 T at its surface, Mars has a magnetic field strength of about 3.01 x 10-5 T, which is slightly weaker but still consistent.

One of the effects of a weak magnetic field is that it provides less protection against harmful solar radiation, making Mars a more challenging environment for life as we know it.

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