What percentage of Earth's surface is covered by the ocean?

• 51%

• 61%

• 71%

• 81%

Which of the following statements best describes the role of the ocean in Earth's climate?

• The ocean only stores water and has no effect on climate.

• The ocean regulates Earth's climate and atmosphere by distributing heat and influencing weather patterns.

• The ocean is responsible for creating mountains.

• The ocean has no impact on planetary stability.

Tags

NGSS.MS-ESS2-6

Which ocean basin is the largest and deepest, known for its numerous trenches and volcanic activity?

• Atlantic Ocean

• Indian Ocean

• Arctic Ocean

• Pacific Ocean

Approximately what percentage of Earth's water is held by the ocean?

• 87%

• 97%

• 77%

• 67%

Tags

NGSS.MS-ESS2-4

Which ocean is characterized by its mid-ocean ridge system and relatively narrower basin?

• Pacific Ocean

• Atlantic Ocean

• Indian Ocean

• Arctic Ocean

Geographically, about what percentage of the Southern Hemisphere is covered by ocean?

• 50%

• 60%

• 70%

• 80%

What is the most likely source of Earth's water according to recent scientific research?

• Only from Earth's atmosphere

• Only from comets

• From asteroids and meteorites, such as those from the asteroid Vesta

• Only from volcanic eruptions

Explain why the unequal distribution of land and water between the Northern and Southern Hemispheres is significant for Earth's geography and climate.

• It has no effect on climate or geography.

• It affects ocean currents, weather patterns, and the distribution of ecosystems.

• It only affects the amount of sunlight each hemisphere receives.

• It only determines the number of continents in each hemisphere.

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Which layer of the Earth is responsible for generating the planet's magnetic field?

• Mantle

• Crust

• Core

• Lithosphere

Tags

NGSS.HS-PS2-5

What is the main composition of the Earth's oceanic crust?

• Granite

• Basalt

• Iron

• Sandstone