Snowball Earth and Volcanic Rescue

Around 700 million years ago, Earth entered a severe ice age, possibly becoming a 'Snowball Earth.' The average temperature dropped to -55°C, reflecting most of the sun's heat. Volcanoes erupted, piercing ice sheets and releasing carbon dioxide, which gradually warmed the planet. By 630 million years ago, CO2 levels were high enough to trap heat, ending the ice age. Fierce storms ensued, and Earth's climate warmed rapidly. Eventually, the climate stabilized, marking a new era.

What event marked the beginning of the Snowball Earth period?

• A sudden increase in volcanic activity

• A significant drop in Earth's temperature

• The formation of large ice sheets in Antarctica

• The collision of a large asteroid

What is one theory about why the Earth entered the Snowball Earth period?

• An increase in solar radiation

• A drop in atmospheric carbon dioxide

• A shift in Earth's orbit

• A decrease in volcanic activity

What was the average surface temperature of Earth during the Snowball Earth period?

• -55°C

• -5°C

• 0°C

• 15°C

How did volcanoes contribute to the end of the Snowball Earth period?

• By causing massive earthquakes

• By releasing large amounts of water vapor

• By releasing carbon dioxide into the atmosphere

• By increasing the Earth's albedo

What was the role of volcanic eruptions during the Snowball Earth period?

• They released gases that helped warm the planet

• They had no significant impact

• They caused the Earth to cool further

• They melted the ice sheets completely

What was the nearest modern event similar to the volcanic activity during Snowball Earth?

• The eruption of Krakatoa

• The 2004 eruption in central Iceland

• The eruption of Mount Vesuvius

• The eruption of Mount St. Helens

What was the primary effect of the carbon dioxide released by volcanoes?

• It led to the extinction of many species

• It trapped heat and warmed the planet

• It caused the ice sheets to expand

• It blocked sunlight from reaching the surface

How did the Earth's climate change after the buildup of carbon dioxide?

• It became colder

• It remained unchanged

• It fluctuated wildly

• It became warmer

What happened to Earth's climate after the Snowball Earth period ended?

• It became extremely hot

• It remained extremely cold

• It stabilized and returned to normal

• It experienced constant volcanic eruptions

What was the result of the Earth's climate stabilization?

• A return to the Snowball Earth conditions

• A new era of dynamic climate change

• A permanent ice age

• A complete extinction of life