Mexico City's Sinking Dilemma

The video about Mexico City mainly discusses:

• The history of Mexico City

• The culture of Mexico City

• The economy of Mexico City

• The geography of Mexico City

Answer explanation

The video primarily focuses on the geography of Mexico City, discussing its location, landscape, and physical features, which distinguishes it from topics like history, culture, or economy.

Mexico City is sinking at a rate of 20 inches a year because:

• It is built on a lake bed and excessive groundwater extraction.

• Frequent earthquakes causing the ground to settle.

• Heavy rainfall eroding the soil.

• Volcanic activity in the region.

Answer explanation

Mexico City is sinking primarily because it is built on a lake bed, which makes the ground unstable, and excessive groundwater extraction further exacerbates the sinking, leading to a rate of 20 inches a year.

The original builders of Mexico City were:

• The Aztecs

• The Mayans

• The Incas

• The Olmecs

Answer explanation

The original builders of Mexico City were the Aztecs, who established the city of Tenochtitlan in 1325. The other options, Mayans, Incas, and Olmecs, were distinct civilizations that did not build Mexico City.

What was the significant change made by the Spanish Conquistadors to the city's geography?

• They built a large wall around the city.

• They drained the surrounding lakes to make a larger city.

• They constructed a series of canals.

• They flattened the surrounding hills.

Answer explanation

The Spanish Conquistadors significantly altered the city's geography by draining the surrounding lakes, which allowed for the expansion of the city and the development of new land for agriculture and settlement.

The geographical location of Mexico City contributes to its sinking issue because it is built on:

• A mountain range

• A coastal plain

• An ancient lakebed

• A desert plateau

Answer explanation

Mexico City is built on an ancient lakebed, which causes the ground to sink as the water is extracted from the aquifers below. This geological feature is the primary reason for the city's sinking issue.

What is one of the challenges faced by Mexico City due to subsidence and groundwater extraction?

• Increased risk of flooding

• Improved water quality

• Stabilized infrastructure

• Reduced air pollution

Answer explanation

Subsidence in Mexico City leads to increased vulnerability to flooding as the ground sinks, disrupting drainage systems and causing water to accumulate during heavy rains.

The geographical location of Mexico City contributes to its environmental problems because:

• It is situated in a valley surrounded by mountains, trapping pollution.

• It is located near the ocean, causing frequent hurricanes.

• It is in a desert region, leading to water scarcity.

• It is at a high altitude, resulting in cooler temperatures.

Answer explanation

The correct choice highlights that Mexico City's location in a valley surrounded by mountains traps pollution, exacerbating its environmental issues. This geographical feature limits air circulation, leading to smog and poor air quality.

What measures have been taken to address the sinking of Mexico City, and why is it still a concern?

• Implementation of water conservation strategies

• Construction of new infrastructure

• Relocation of residents

• All of the above

Answer explanation

To combat the sinking of Mexico City, measures like water conservation strategies, new infrastructure construction, and resident relocation have been implemented. Despite these efforts, the issue persists due to ongoing groundwater extraction.

Mexico City is considered a cultural jewel because of its:

• Rich history and vibrant arts scene

• Modern architecture and technology

• Natural landscapes and wildlife

• Economic growth and business opportunities

Answer explanation

Mexico City is a cultural jewel due to its rich history, including ancient civilizations, and a vibrant arts scene that encompasses music, dance, and visual arts, making it a hub of cultural expression.

What actions are suggested in the passage to prevent Mexico City from sinking into oblivion?

• Implement water conservation measures

• Increase urban development

• Promote tourism

• Expand industrial activities

Answer explanation

The passage suggests implementing water conservation measures as a key action to prevent Mexico City from sinking. This approach addresses the critical issue of water depletion, which is essential for the city's sustainability.