What is the significance of the "Blue Marble" image taken during the Apollo 17 mission?

• It showed the first clear image of the moon.

• It became a symbol for the environmental movement.

• It proved the Earth was flat.

• It was the first photo taken from space.

How did the approach to scientific study change by the 1900s compared to ancient natural philosophers?

• Scientists began to study fewer subjects in greater detail.

• Scientists started studying more subjects at once.

• Scientists focused only on theoretical concepts.

• Scientists stopped using mathematics in their studies.

Who was the first to correctly predict rising atmospheric carbon dioxide concentrations and their effect on global temperatures?

• Charles Keeling

• Roger Revelle

• Guy Callendar

• Han Suess

Which event is considered a "Golden Spike" candidate for marking the beginning of the Anthropocene due to its widespread radioactive material?

• The start of extensive coal mining.

• The development of plastic production.

• The Trinity atomic bomb test.

• The establishment of the IPCC.

What is the defining characteristic of a "mega city"?

• An urban area with over 1 million people.

• A city with extensive green spaces and national parks.

• An urban area with over 10 million people.

• A landscape dominated by industrial agriculture.

Which animal's bones are considered the most common terrestrial vertebrate species on the planet, reflecting significant human impact on the Earth's geological record?

• Cow bones

• Chicken bones

• Pig bones

• Fish bones

What are "Planetary Boundaries"?

• The physical limits of Earth's atmosphere.

• A set of nine specific ranges for natural processes within which humans can safely live.

• The borders between different countries on Earth.

• Measures of human population density in urban areas.

What is a major cause of the decline in pollinator populations like honeybees and butterflies?

• Increased urbanization

• Off-target damage from pesticides

• Climate change

• Ocean acidification