Test: Matter & Material - 2 - Grade 4 MCQ

Wood is an example of a solid material because it has a definite shape and volume. Unlike liquids or gases, wood cannot be poured or easily compressed.

A banana is a solid because it has a definite shape and volume. Solids have particles that are closely packed together and do not flow easily.

Milk is an example of a liquid material because it takes the shape of its container and can flow. Liquids have particles that are close together but can move past one another.

Oxygen is an example of a gas material because it does not have a definite shape or volume. Gases can expand to fill the space available to them.

Sublimation is the process in which a solid changes directly into a gas without passing through the liquid state. Examples of substances that can sublime include dry ice (solid carbon dioxide) and mothballs (naphthalene).

Rubber is an insulator because it does not allow electricity or heat to pass through it easily. Insulators are materials that have high resistance to the flow of electricity or heat.

Copper is a conductor because it allows electricity or heat to pass through it easily. Conductors are materials that have low resistance to the flow of electricity or heat.

Evaporation is the process in which a liquid changes into a gas at a temperature below its boiling point. During evaporation, the particles in the liquid gain enough energy to escape into the air as vapor.

The correct answer is C: Sugar and salt. Both sugar and salt are solutes that are soluble in water.

When a gas is heated, its particles gain energy and move faster, causing the gas to expand and occupy a larger volume. Heating a gas increases the average distance between the particles, leading to an increase in volume.