Geography Quiz

What percentage of the world's population lives on or within 60km of coasts?

• More than 50%

• More than 60%

• More than 70%

• More than 80%

What is the main cause of isostatic changes in sea level?

• Changes in the amount of water in the oceans

• Changes in the height of the land relative to the sea

• Melting of polar ice caps

• Tectonic activity

Which area is not mentioned as being threatened by rising sea level in Figure 1?

• Gulf of La Plata, Argentina

• Nile delta

• Southern and eastern England

• West African coast

What evidence can be used to establish past sea levels?

• Shoreline deposits such as shells, wood and peat found in marine cores

• Satellite imagery of current sea levels

• Predictive modeling of future sea levels

• Historical written records of sea levels

Which of the following is a result of tectonic activity?

• Eustatic changes

• Isostatic readjustment

• Climate changes

• Glacio-eustatic changes

What is the term used to describe changes in sea level due to the volume of water transferred to glaciers and ice caps?

• Eustatic changes

• Isostatic changes

• Glacio-eustatic changes

• Tectonic-eustatic changes

What is the main cause of the current sea level rise due to thermal expansion and ice melt?

• Emission of greenhouse gases

• River and wetland modification

• Extraction of groundwater

• Uplift due to tectonic forces

Which area experienced a subsidence of 9.5m in a 50-year period due to extraction of groundwater?

• Homer spit

• Mississippi

• California

• Papua New Guinea

What is the estimated time scale for oceanic volume changes in deep waters (500-4000m) due to sea level change?

• 0.1-100 years

• 10-10,000 years

• 100-100,000 years

• 100,000-100^5 years

Which of the following is not a consequence of sea level rise?

• Accelerated erosion of cliffs and beaches

• Salinisation of agricultural land

• Increased sediment supply to deltas

• Widespread destruction of habitats, especially coastal marshes