Understanding Earth's Changes

What do scientists use to track changes on Earth over time?

• Radios

• Microscopes

• Satellite images

• Telescopes

What natural event caused floods in West Africa in 2020?

• Landslide

• Tsunami

• Heavy rains

• Earthquake

How did the landscape change in West Africa after the 2020 floods?

• It turned into a desert

• It was covered in shallow water and plants

• It became drier

• It was covered in snow

What was the effect of heavy rains in Australia in 2021?

• Earthquake

• Drought

• Floods

• Forest fire

What did the satellite images from 2017 and 2020 around Asunción show?

• Drought effects

• Forest regrowth

• Increased river flow

• Urban expansion

What was a significant effect of the 1980 eruption of Mount St. Helens?

• Development of a city

• Creation of a new mountain

• Destruction of a forest

• Formation of a new river

What caused the transformation of the landscape around Mount St. Helens?

• A flood

• A drought

• An earthquake

• A volcanic eruption

What does the growth of Cancún, Mexico, illustrate?

• Natural recovery

• Human impact on environment

• Glacial melting

• Volcanic activity

What are the consequences of Cancún's growth as a vacation destination?

• Improved local economy

• Environmental problems

• Reduced air pollution

• Increased wildlife diversity

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

• Flooding and displacement

• Improved water clarity

• Increased fish populations

• Decreased water levels