Earth and Life Science - Origin and Structure of the Earth

Flashcards about the origin and structure of the Earth, focusing on its unique characteristics and habitability.

What features shield Earth from harmful radiation from the Sun?

A molten nickel-iron core, an extensive magnetic field, and an atmosphere.

What are the three main reasons Earth is considered a unique planet?

It has liquid water, a solid lithosphere, and an atmosphere.

Approximately what percentage of Earth's surface is covered by liquid or frozen water?

About 70%

What key factors make Earth habitable?

Right distance from the sun, insulating atmosphere, and presence of water and carbon.

What similarities do Earth, Venus, and Mars share?

Terrestrial, have an atmosphere, similar rotation, and contain carbon dioxide and landforms

What are the key differences between Earth, Venus, and Mars?

Earth has life forms, while Venus has no water or oxygen, and Mars lacks oxygen.

Why is Earth considered a habitable planet?

It has the right distance from the sun, protection from radiation, an insulating atmosphere, and the right ingredients for life.

What distinguishes Earth from other planets?

Earth is the only planet with liquid water on its surface

What makes Earth a suitable "house" for living organisms?

Comfortable distance from the sun and an atmosphere that serves as a shield.

How does Earth support human and other living organism survival?

Provides food, protects from threats, and has suitable temperature, water, and climate.

What factors make Earth habitable to support the survival of organism?

Earth has an atmosphere, temperature, energy, an nutrients.

What nutrients does planet Earth offer for an organism to exist?

Earth provides the needed nutrients and natural activities to circulate them.