NOSB 2018 (Regional Competition 1/Round 6)

Front

What bioavailable element does NOT stimulate algal blooms?

Back

Calcium

Front

What is the name for a high-velocity density current that carries suspended matter?

Back

Turbidity current

Front

Which of the following is NOT a type of pollution regulated by MARPOL?

Back

Agricultural runoff causing dead zones

Front

What is the theoretical ocean boundary at which the rate of calcium carbonate precipitation equals the rate of dissolution?

Back

Calcium carbonate compensation depth (CCD)

Front

On which side of Australia would you expect to find dust blown into the oceans from the continent?

Back

Southeast

Front

Define bioavailable elements in marine ecosystems.

Back

Bioavailable elements are nutrients that are accessible for uptake by organisms, such as nitrogen and phosphorus.

Front

What is algal bloom and what causes it?

Back

An algal bloom is a rapid increase in the population of algae in water, often caused by excess nutrients like nitrogen and phosphorus.

Front

Explain the significance of turbidity currents in marine environments.

Back

Turbidity currents are important for transporting sediments and nutrients, influencing marine ecosystems and sedimentary processes.

Front

What is MARPOL and its purpose?

Back

MARPOL is an international treaty aimed at preventing pollution from ships, covering various types of pollution including oil and garbage.

Front

What is the carbonate compensation depth (CCD)?

Back

The CCD is the depth in the ocean where the rate of calcium carbonate dissolution equals the rate of its precipitation.