What Do You Remember - Water Properties & Bases and Acids Quiz

What is cohesion?

• The attraction between water molecules and other substances

• The attraction between water molecules themselves

• The ability of water to evaporate quickly

Answer explanation

Cohesion refers to the attraction between water molecules themselves, which allows them to stick together. This property is crucial for various phenomena, such as surface tension, making the correct choice the attraction between water molecules.

What is adhesion?

• The ability of water to form droplets

• The attraction of water molecules to other surfaces

• The process of water turning into vapor

Answer explanation

Adhesion refers to the attraction of water molecules to other surfaces, allowing water to cling to materials like glass or plant leaves. This is different from cohesion, which is the attraction between water molecules themselves.

What causes surface tension in water?

• The heat from the sun

• The strong cohesive forces between water molecules

• The weight of the water

Answer explanation

Surface tension in water is caused by the strong cohesive forces between water molecules. These forces create a 'skin' on the surface, allowing it to resist external force.

Which of the following is an example of cohesion?

• Water climbing up a straw

• A water droplet forming on a leaf

• Water sticking to the side of a glass

Answer explanation

A water droplet forming on a leaf is an example of cohesion, as it demonstrates the attraction between water molecules, causing them to stick together and maintain a droplet shape.

What is capillary action?

• Water moving downward in the soil

• Water rising in narrow tubes against gravity

• Water evaporating from a surface

Answer explanation

Capillary action is the ability of water to rise in narrow tubes against gravity due to adhesion and cohesion forces. This phenomenon is crucial for water transport in plants and is correctly described by the choice 'Water rising in narrow tubes against gravity'.

Why can some insects walk on water?

• They are very light

• They have special legs

• Surface tension allows them to stay on top

Answer explanation

Insects can walk on water due to surface tension, which is the cohesive force between water molecules. This tension allows them to stay on the surface without sinking, despite their weight.

What is the pH value of an acid?

• Above 7

• Below 7

• Exactly 7

Answer explanation

The pH scale ranges from 0 to 14. Acids have a pH value below 7, indicating higher concentrations of hydrogen ions. Therefore, the correct answer is 'Below 7'.

What taste do acids typically have?

• Sweet

• Sour

• Bitter

Answer explanation

Acids typically have a sour taste, which is why foods like lemons and vinegar are described as sour. This characteristic distinguishes them from sweet or bitter flavors.

What happens to blue litmus paper when it comes in contact with an acid?

• It turns red

• It stays blue

• It turns green

Answer explanation

When blue litmus paper comes in contact with an acid, it undergoes a chemical reaction that causes it to change color. Specifically, it turns red, indicating the presence of acidity.

Tags

NGSS.MS-PS1-2

Which of the following is true about bases?

• They donate hydrogen ions (H+)

• They accept hydrogen ions (H+)

Answer explanation

Bases are substances that accept hydrogen ions (H+) in a chemical reaction. This is the defining characteristic of bases, distinguishing them from acids, which donate hydrogen ions.