Impact of Climate Change on Sea Levels

The video tutorial covers sea level change, focusing on eustatic and isostatic changes. It explains how ice advance and retreat affect sea levels, leading to submergent and emergent coastal features. The impact of climate change on sea levels, including ice melt and thermal expansion, is discussed. The video concludes with an exam-style question on drawing and explaining a fiord.

What is the primary difference between eustatic and isostatic sea level changes?

• Eustatic changes occur only in the Northern Hemisphere, while isostatic changes occur globally.

• Eustatic changes are related to the sea, while isostatic changes are related to the land.

• Eustatic changes are local, while isostatic changes are global.

• Eustatic changes are caused by tectonic activity, while isostatic changes are caused by ice melt.

During the ice advance stage, what happens to the sea level?

• It falls because more water is stored in ice.

• It rises due to increased precipitation.

• It fluctuates unpredictably.

• It remains constant as ice and water balance each other.

What causes isostatic movement during the ice advance stage?

• The melting of glaciers.

• The weight of ice causing the land to sink.

• Tectonic shifts in the Earth's crust.

• Increased volcanic activity.

What is a submergent feature that forms due to eustatic sea level rise?

• Cliff arches

• Drowned river valleys

• Wave-cut platforms

• Raised beaches

What happens during isostatic readjustment?

• The sea level rises due to thermal expansion.

• The land sinks further due to increased ice.

• The sea level falls due to decreased ice.

• The land rises back up after ice melts.

Which feature is associated with emergent coastlines?

• Raised beaches

• Submerged river valleys

• Dendritic drainage systems

• Drowned glacial valleys

How does climate change contribute to eustatic sea level rise?

• By melting ice and causing thermal expansion.

• By decreasing precipitation.

• By increasing volcanic activity.

• By causing tectonic shifts.

What is a potential consequence of rising sea levels on freshwater sources?

• Increased freshwater availability

• Salination of freshwater sources

• Increased water clarity

• Decreased water temperature

Which areas are most at risk from rising sea levels due to climate change?

• Desert regions

• Low-lying coastal areas

• High-altitude regions

• Mountainous areas

What is the effect of thermal expansion on sea levels?

• It causes sea levels to fall.

• It stabilizes sea levels.

• It has no effect on sea levels.

• It causes sea levels to rise.