Earth's Evolution Exam

What makes Earth unique among the planets in the solar system?

• Its proximity to the Sun

• Its large size

• Its lack of a magnetic field

• Its ability to support life

Which of the following is essential for life on Earth?

• Liquid nitrogen

• Liquid water

• Ammonia-rich atmosphere

• Thin atmosphere

Which feature of Earth protects it from cosmic rays?

• Oceans

• Ice caps

• Magnetic field

• Thick atmosphere

What would happen if Earth were 10 percent closer to the Sun?

• Earth would be too hot for liquid water

• Earth would be too cold for liquid water

• Earth would lose its atmosphere

• Earth would have a larger magnetic field

What event contributed to the accumulation of oxygen in Earth's atmosphere 2.5 billion years ago?

• A comet collision

• Volcanic eruptions

• The Great Oxygenation Event

• Photosynthesis by primitive organisms

Which of the following gases was absent in Earth's early atmosphere?

• Nitrogen

• Carbon dioxide

• Water vapor

• Oxygen

What is a supernova?

• A massive explosion of a star that forms heavy elements

• A collision of planetesimals

• A volcanic eruption

• A planet formation event

Which element is primarily responsible for the formation of Earth’s metallic core?

• Silicon

• Iron

• Oxygen

• Hydrogen

What was Earth's early state after its formation?

• Covered with glaciers

• Solid rock crust

• A molten surface

• Covered with oceans

How did Earth’s primitive atmosphere change over time?

• It became richer in oxygen

• It became richer in nitrogen

• It had a drastic drop in carbon dioxide

• It became thinner