The Power of Electromagnetism in Our Universe

Electromagnetism is a fundamental force that generates light and energy, holding atoms and matter together. It involves interactions between electric and magnetic fields, forming electric currents and magnetic fields. The electromagnetic spectrum includes visible light and other waves like radio and gamma rays. Earth's geodynamo creates a magnetic field, protecting the planet from harmful space radiation.

What is one of the key roles of electromagnetism in the universe?

• It creates gravity.

• It generates nuclear energy.

• It causes chemical reactions.

• It holds atoms and matter together.

What happens when atoms gain a positive or negative charge?

• They form a magnetic field.

• They lose their mass.

• They become neutral.

• A measurable electric field forms.

Which part of the electromagnetic spectrum is visible to the human eye?

• Gamma rays

• Visible light

• Infrared waves

• Radio waves

What type of electromagnetic waves are used in medical applications due to their ability to pass through the human body?

• Radio waves

• Microwaves

• X-rays

• Ultraviolet waves

What is the process called that turns Earth into a giant electromagnet?

• Geothermal activity

• Geodynamo

• Electrolysis

• Magnetic resonance

How does Earth's magnetic field benefit life on the planet?

• It increases the planet's temperature.

• It provides a source of renewable energy.

• It enhances wireless communication.

• It shields us from harmful space radiation.