Properties of Water and Density

The video explores the unique properties of water, focusing on its colorless, odorless, and tasteless nature. It explains the freezing and boiling points, and the relationship between density and volume. The concept of anomalous expansion is discussed, highlighting how water behaves differently from other liquids, which allows ice to float and supports marine life in cold regions.

What gives normal drinking water its slight taste?

• The presence of ice

• The presence of dissolved minerals and gases

• The boiling process

• The absence of color

At what temperature does water change from liquid to solid?

• 100°C

• 0°C

• 10°C

• 4°C

How does the density of a substance change if its volume increases while mass remains constant?

• Density increases

• Density decreases

• Density doubles

• Density remains the same

Why does ice float on water?

• Ice is heavier than water

• Ice is warmer than water

• Ice has a higher density than water

• Ice has a lower density than water

What is the term for water's unusual behavior when cooled below 4°C?

• Density inversion

• Normal expansion

• Anomalous expansion

• Thermal contraction

At what temperature is the density of water at its maximum?

• 0°C

• 4°C

• 10°C

• 100°C

What happens to the volume of water as it is cooled from 10°C to 4°C?

• Volume increases

• Volume decreases

• Volume remains constant

• Volume doubles

How does the anomalous expansion of water benefit marine life?

• It prevents ice formation

• It ensures water remains beneath ice

• It allows ice to sink

• It increases water temperature

Why is the density of water important for aquatic life in cold regions?

• It decreases the salinity of water

• It increases the temperature of water

• It allows ice to float, keeping water below

• It prevents water from freezing

What is the density of water at 4°C?

• 1000 kg/m³

• 750 kg/m³

• 1250 kg/m³

• 500 kg/m³