Unit 2 part 2 Test

Front

The tightness across the surface of water that enables paper clips to float is ____________.

Back

Surface tension is the property of liquid surfaces that allows them to resist an external force, due to the cohesive nature of its molecules.

Front

What two elements make up water?

Back

Water is composed of two hydrogen atoms and one oxygen atom (H2O).

Front

Electricity is the flow of _____

Back

Electricity is the flow of electrons, which are negatively charged particles.

Front

What is the attractive force between two bodies of different substances that are in contact with each other?

Back

Adhesion is the property of water molecules that allows them to stick to other substances.

Front

The electrical force between charges is strongest when the charges are __________.

Back

The electrical force between charges is strongest when the charges are close together.

Front

What is cohesion in the context of water molecules?

Back

Cohesion is the property of water molecules that allows them to stick to each other, contributing to surface tension.

Front

Define polarity in relation to water molecules.

Back

Polarity refers to the distribution of electrical charge over the atoms joined by the bond, making water a polar molecule with a partial positive charge on hydrogen and a partial negative charge on oxygen.

Front

What is capillary action?

Back

Capillary action is the ability of a liquid to flow in narrow spaces without the assistance of external forces, often seen in plants as water moves up through roots.

Front

What is specific heat?

Back

Specific heat is the amount of heat required to change the temperature of a unit mass of a substance by one degree Celsius.

Front

What is the universal solvent?

Back

Water is known as the universal solvent because it can dissolve more substances than any other liquid, making it essential for life.