Which of the following is essential for a magnetic dynamo?
A) flows of charged particles
B) a solid bar magnet
C) rapid variations in the rotation rate
D) conduction
Correct Answer:
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Q21: Tides are caused by:
A) the centrifugal force
Q22: What is the most likely effect of
Q23: A planet that experiences an increase in
Q24: If the greenhouse effect were to increase
Q25: If the amount of ozone in the
Q27: Earth's magnetic field is created by:
A) the
Q28: The oxygen in Earth's atmosphere was first
Q29: Maria are:
A) captured moons of the gas
Q30: Tidal locking is responsible for:
A) the Sun's
Q31: The atmospheric layer in which most weather
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