A Boat Is Floating in a Small Pond

question 19

Multiple Choice

A boat is floating in a small pond. The boat then sinks so that it is completely submerged. What happens to the level of the pond?

• A) It increases.
• B) It decreases.
• C) It stays the same.
• D) In some cases it would decrease, in others it would stay the same.
• E) In some cases it would increase, in others it would stay the same.

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Definitions:

Bronchogram

A radiographic image of the bronchi, usually obtained after the airways have been filled with a contrast medium, for diagnostic purposes.

Air Passageways

The routes throughout the respiratory system, including the nose, throat, windpipe, and lungs, through which air is inhaled and exhaled.

Radioactive Chemical

A substance that contains unstable atoms which release radiation as they decay.

PET Scan

Positron Emission Tomography, a sophisticated imaging technique that uses radioactive substances to visualize and measure changes in metabolic processes and in other physiological activities including blood flow, regional chemical composition, and absorption.