Earth's Changes and Their Impact

The video explores how Earth is changing by comparing past and present images. It highlights natural phenomena like floods and volcanoes, human activities such as urbanization, and climate change impacts, particularly glacier melting. Scientists use satellite images to track these changes, emphasizing the importance of understanding and addressing them.

What method do scientists use to observe changes on Earth over time?

• Conducting interviews with locals

• Using telescopes to observe from space

• Comparing new and old images

• Collecting soil samples

What natural event in West Africa in 2020 significantly altered the landscape?

• A volcanic eruption

• A severe drought

• Intense floods

• A massive earthquake

How did heavy rains in Australia in 2021 affect the environment?

• They improved crop yields

• They increased the number of green areas

• They caused river blockages and flooding

• They led to a volcanic eruption

What was the impact of the 1980 eruption of Mount St. Helens?

• It created a new river

• It destroyed a large part of the nearby forest

• It caused a drought in the region

• It led to the growth of new plant species

What transformation did Cancún, Mexico, undergo over 50 years?

• It transformed into a vacation destination

• It turned into a desert

• It became a major industrial hub

• It became a wildlife sanctuary

What environmental issue arose from the growth of Cancún?

• Water pollution and beach erosion

• Desertification

• Increased volcanic activity

• Deforestation

What was a significant consequence of the dam construction on the Paraguay-Parana River system?

• It improved local agriculture

• It caused widespread flooding and habitat loss

• It reduced water pollution

• It increased fish populations

What is a major effect of climate change observed by scientists?

• The growth of new forests

• The increase in volcanic eruptions

• The melting of glaciers

• The formation of new rivers

What has happened to the Muir Glacier over the years?

• It has expanded significantly

• It has become a tourist attraction

• It has remained unchanged

• It has melted and retreated

Why are NASA satellite images important for understanding Earth's changes?

• They predict future natural disasters

• They are used for entertainment purposes

• They help track changes and address environmental issues

• They provide real-time weather updates