Exploring the Secrets of Magnetism

What was the first known use of magnetism by humans?

• Attracting iron with lodestones

• Fashioning tools

• Naming the stars

• Creating fire

What did William Gilbert discover about magnetized needles?

• They point North and slant down towards the Earth

• They can cure diseases

• They increase elegance and charm

• They can float in water

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

• The alignment of stars

• The rotation of the Earth

• The gravitational pull of the moon

• Currents in the liquid metals in the Earth's core

How do spiny lobsters navigate during their migration?

• Following ocean currents

• Using the sun and stars

• Using visual landmarks

• By sensing the Earth's magnetic field

What is the principle behind magnetic levitation (maglev) trains?

• Using gravitational forces

• Using repelling and attracting magnetic fields

• Using solar power

• Using wind resistance

What is the purpose of using liquid nitrogen at MIT's fusion research facility?

• To produce energy

• To create a magnetic bottle

• To cool the electromagnets

• To heat the plasma

Which force is responsible for holding atomic nuclei together?

• Electromagnetic force

• Gravity

• Weak force

• Strong force

What did William Gilbert discover about magnetized needles?

• They float in water

• They point towards the sun

• They lose their magnetism over time

• They slant down towards the Earth

How do bacteria navigate in their environment?

• Using gravity

• Using sound waves

• Using light patterns

• Using magnetic fields

What is the significance of the Earth's magnetic field?

• It helps in the formation of clouds

• It causes earthquakes

• It protects us from cosmic radiation

• It increases the Earth's temperature