5.4 Matter

Front

What is evaporation?

Back

Evaporation is the process by which liquid water changes into water vapor (gas) when it is heated.

Front

Which state of matter has a definite shape and a definite volume?

Back

Solid. Solids have a fixed shape and volume because their molecules are closely packed together.

Front

What happens to the molecules in a solid when it is heated?

Back

When a solid is heated, its molecules gain energy and start to move more, which can eventually lead to melting.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances where each substance retains its own properties, like a bowl of candy.

Front

What is condensation?

Back

Condensation is the process by which water vapor (gas) cools and changes back into liquid water.

Front

What is the arrangement of molecules in a solid?

Back

In a solid, molecules are tightly packed together in a fixed arrangement.

Front

What is the process of changing a solid to a liquid called?

Back

Melting. This occurs when a solid is heated to its melting point.

Front

What is the difference between a solid and a liquid?

Back

Solids have a definite shape and volume, while liquids have a definite volume but take the shape of their container.

Front

What is a solution?

Back

A solution is a homogeneous mixture where one substance (solute) is dissolved in another (solvent), like saltwater.

Front

What happens to the temperature of a substance during evaporation?

Back

During evaporation, the temperature of the remaining liquid decreases because the molecules with the highest energy escape.