Understanding Earth's Magnetic Field

What is the primary function of Earth's magnetic field?

• To support plant growth

• To regulate climate

• To protect from space radiation

• To provide gravity

What is a geomagnetic reversal?

• A reversal of ocean currents

• A shift in tectonic plates

• A flip in Earth's magnetic poles

• A change in Earth's orbit

How many times has Earth's magnetic field flipped in the past 84 million years?

• 500 times

• 183 times

• 50 times

• 10 times

What is the dynamo effect responsible for?

• Causing earthquakes

• Forming mountain ranges

• Generating Earth's magnetic field

• Creating ocean currents

What is the composition of Earth's outer core?

• Gaseous hydrogen

• Molten iron and nickel

• Solid rock

• Water and ice

What causes the magnetic field to shift and move?

• Tectonic plate movements

• Changing flows within the outer core

• Solar flares

• Volcanic eruptions

What might trigger a geomagnetic reversal?

• An asteroid impact

• A solar eclipse

• A volcanic eruption

• A tsunami

What is the current behavior of the north magnetic pole?

• It is stationary

• It is moving towards Siberia

• It is moving towards the equator

• It is moving towards the South Pole

What is the potential impact of a weakened magnetic field on life?

• Increased gravity

• Higher cancer rates

• Decreased oxygen levels

• More frequent earthquakes

What is the likelihood of a catastrophic event due to a magnetic field reversal?

• Very high

• Moderate

• Low

• Impossible