GBR & sea level rise

The peak of the most recent ice age was

• 500 000 years ago

• 20 000 years ago

• 10 000 years ago

• 6500 years ago

During an ice age, (glacial maximum), the level of the oceans

• stabilises

• rises

• lowers

• changes

An increase in atmospheric CO₂

• causes temperatures to rise and sea level to fall

• causes temperatures to rise and sea level to rise

• causes temperatures to fall and sea level to fall

• causes temperatures to fall and sea level to rise

Sea levels have been relatively stable for the last 6500 years. How much higher are they now than then?

• 20m

• 120m

• 1200m

• 2000m

What happened to coral on the East Australian Coast as sea levels rose?

• they were drowned

• the water was too deep for light to penetrate

• they moved further north

• their growth kept pace with the increasing sea level

How does a continental island form?

• a volcano forms then sinks into the ocean

• water rises around continental mountains

• tectonic plates shift and raise part of the crust

• coral grows up until it breakds the surface of the water

This diagram shows the sea level around Australia when?

• approx 500 000 years ago

• approx 20 000 years ago

• approx 10 000 years ago

• approx 6500 years ago