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4) What is Earth’s largest island (not counting continents)?

• Greenland
• Borneo
• Madagascar
• Sumatra

Which country has the highest mountain in the world within its borders?

• Nepal
• Tibet
• India
• Bhutan

What is the longest river in the world?

• Mississippi

• Nile

• Yangtze

• Amazon

What causes day and night on Earth?

• The tilt of the Earth on its axis.
• The rotation of the Earth on its axis.
• The phases of the Moon.
• The distance of the Earth from the Sun.

What phenomenon is responsible for the changing seasons on Earth?

• The distance of the Earth from the Sun.

• The tilt of the Earth's axis.

• The orbit of the Earth around the Sun.

• The rotation of the Earth on its axis.

7) Which process breaks down rocks at Earth’s surface through wind, water, and temperature changes?

• Sedimentation
• Erosion
• Metamorphism
• Weathering

What percentage of Earth’s surface is covered by water (roughly)?

• 71%
• 85%
• 30%
• 50%

What layer of the Earth is primarily composed of molten rock?

• Outer core

• Mantle

• Crust

• Inner core

Which gas is most abundant in the Earth's atmosphere?

• Oxygen

• Nitrogen

• Carbon Dioxide

• Argon

What is the primary source of energy for the Earth's climate system?

• Nuclear energy

• Wind energy

• Geothermal energy

• Solar energy