Front

What is the force that allows a paper clip to float on the surface of a water droplet?

Back

Surface tension is the force that allows a paper clip to float on the surface of a water droplet.

Front

What property of water describes the attraction between water molecules?

Back

Cohesion describes the attraction between water molecules.

Front

Why can some insects walk on water without sinking?

Back

Insects can walk on water without sinking due to surface tension, which is caused by hydrogen bonds between water molecules.

Front

What causes water molecules to stick to each other?

Back

Water molecules stick to each other due to hydrogen bonding, where one side of the molecule has a positive charge and the other side has a negative charge.

Front

What two elements combine to form water?

Back

Hydrogen and oxygen combine to form water.

Front

What is the term for the attraction between different substances, such as water and a glass surface?

Back

Adhesion is the term for the attraction between different substances.

Front

How does temperature affect the density of water?

Back

As water cools, it becomes denser until it reaches 4 degrees Celsius; below this temperature, it becomes less dense, which is why ice floats.

Front

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

Back

Water's high specific heat allows it to absorb and release large amounts of heat without significant temperature changes, helping to regulate climate.

Front

What is the role of hydrogen bonds in water's unique properties?

Back

Hydrogen bonds are responsible for water's unique properties, including high surface tension, cohesion, adhesion, and high specific heat.

Front

What is the pH level of pure water, and why is it important?

Back

The pH level of pure water is 7, which is neutral; this is important for maintaining balance in biological systems.