Periodo glaciar

The video discusses periods when Earth's temperatures were low, leading to the expansion of glaciers and ice sheets. The last glacial period ended around 15,000 years ago. Earth has experienced at least five major glaciations, during which large portions of the surface were covered in ice.

What happens to the Earth's surface during glaciations?

• It becomes more forested.

• It becomes warmer and drier.

• It is covered by glaciers and ice sheets.

• It experiences increased volcanic activity.

Approximately how many years ago did the last glacial period end?

• 25,000 years ago

• 15,000 years ago

• 10,000 years ago

• 20,000 years ago

How many major glaciations has the Earth experienced?

• At least 9

• At least 7

• At least 5

• At least 3

What is a characteristic feature of glaciations?

• Increased rainfall

• Expansion of ice sheets

• Rise in sea levels

• Growth of deserts

What is the term for long periods when the Earth's surface is covered by ice?

• Interglacial periods

• Glaciations

• Tectonic shifts

• Volcanic eruptions