IB Biology 2.2 Water

Front

What is the primary molecule that carries oxygen in the human body?

Back

Hemoglobin

Front

How is methane classified in terms of polarity?

Back

Non-polar

Front

How is water classified in terms of polarity?

Back

Polar

Front

What term describes substances that are insoluble in water?

Back

Hydrophobic

Front

Why is water considered a polar molecule?

Back

Because it has a slightly electropositive end and a slightly electronegative end.

Front

What property of water allows it to be an effective coolant when sweating?

Back

Breaking hydrogen bonds between water molecules in sweat requires energy from body heat.

Front

What is the significance of water's high specific heat capacity?

Back

It helps regulate temperature in organisms and environments.

Front

What is cohesion in the context of water?

Back

The attraction between water molecules due to hydrogen bonding.

Front

What is adhesion in the context of water?

Back

The attraction between water molecules and other substances.

Front

How does water's density change when it freezes?

Back

Ice is less dense than liquid water, allowing it to float.