A1.1 Water HL

Question 1

Extraplanetary Origin of Water

Answer 1

Water on Earth originated from multiple collisions with water-rich asteroids, highlighting an extraplanetary source

Question 2

Role of Earth’s Gravity in Water Retention

Answer 2

Earth’s gravity plays a crucial role in retaining water on its surface, essential for life’s evolution

Question 3

Goldilocks Zone Concept

Answer 3

The ‘Goldilocks Zone’ refers to the orbital distance from a star where conditions are just right for liquid water, crucial for supporting life

Question 4

Importance of Water in Life’s Evolution

Answer 4

The presence of liquid water on Earth, acting as a solvent and medium for metabolism, was vital for the evolution of life

Question 5

Search for Extraterrestrial Life and Water

Answer 5

The search for extraterrestrial life focuses on finding liquid water on other planets, as it’s considered essential for life