Origin of Water and the Goldilocks Zone

What is one way HL topics differ from SL topics?

• HL topics are only about viruses.

• HL topics may include subjects not covered in SL.

• HL topics cover the same material as SL but in less detail.

• HL topics are always more difficult.

What was the state of early Earth before it could hold water?

• It was a desert.

• It was covered in ice.

• It was a hot molten rock.

• It was a lush green planet.

According to the asteroid theory, what did asteroids bring to Earth?

• Oxygen

• Water

• Nitrogen

• Carbon dioxide

What is the main evidence supporting the asteroid theory?

• Asteroids are made of the same materials as Earth.

• The ratio of normal water to heavy water is the same on asteroids and Earth.

• Asteroids have the same temperature as Earth.

• Asteroids have the same color as Earth.

What is the Goldilocks Zone?

• A region where planets are too hot.

• A region where planets are too cold.

• A region where conditions are just right for liquid water to exist.

• A region where there is no sunlight.

Which type of star is our Sun classified as?

• M Star

• K Star

• G Star

• L Star

Why is gravity important for a planet to support water?

• It prevents water from floating away into space.

• It increases the planet's size.

• It keeps the planet warm.

• It creates an atmosphere.

What additional feature must a planet have to protect life from the sun's radiation?

• A desert

• A magnetic field and atmosphere

• A thick layer of ice

• A large ocean

What happens to water if a planet is outside the Goldilocks Zone?

• It becomes solid rock.

• It turns into gas.

• It evaporates or freezes.

• It remains in liquid form.

What is the significance of the Goldilocks Zone for life?

• It provides a planet with sunlight.

• It ensures a planet has a magnetic field.

• It allows for the existence of liquid water, crucial for life.

• It guarantees a planet has an atmosphere.