Topic 1 Review - 7th Grade

Front

What is a solvent?

Back

A solvent is a substance that dissolves a solute, resulting in a solution. In the case of Ria's experiment, water is the solvent.

Front

What is a concentrated solution?

Back

A concentrated solution contains a large amount of solute relative to the amount of solvent.

Front

How do you arrange solutions from diluted to concentrated?

Back

To arrange solutions from diluted to concentrated, you compare the amount of solute in each solution.

Front

What happens when salt dissolves in water?

Back

When salt dissolves in water, it undergoes a physical change, as the salt can be recovered by evaporating the water.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a solution?

Back

A solution is a homogeneous mixture of two or more substances, where one substance (the solute) is dissolved in another (the solvent).

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the role of carbon dioxide in Ria's experiment?

Back

Carbon dioxide acts as a solute when it is dissolved in water.

Front

What is the significance of the solute in a solution?

Back

The solute is the substance that is dissolved in the solvent, and it determines the properties of the solution.

Front

How can you identify a concentrated solution visually?

Back

A concentrated solution often appears darker or more intense in color compared to a diluted solution.