Test: Matter and Materials - 1 - Class 4 MCQ

Matter is composed of mass, which refers to the amount of material present, and occupies space, allowing us to measure its weight.

Solids have the property of shape retention, which means they maintain their shape even when moved to a different location.

Liquids can flow, meaning they can move and change their position. They lack a fixed shape and assume the shape of their containers.

Gases lack a fixed shape and can assume the shape of their containers. They can flow but cannot be poured like a liquid.

Melting is the process in which a solid changes to a liquid state due to the application of heat.

Solidifying is the process in which a liquid changes to a solid state due to cooling, which causes the molecules to come together and form a rigid structure.

Evaporation is the process in which a liquid changes to a gaseous state due to the application of heat, leading to the escape of molecules from the liquid surface.

Condensation is the process in which a gas changes to a liquid state due to cooling, causing the molecules to come together and form liquid droplets.

When water vapor in the air cools near a cold glass, it condenses and forms water droplets on the glass surface.

The water cycle refers to the continuous process of water evaporating from a liquid state, transforming into water vapor (a gas), and then condensing back into liquid droplets, ensuring the Earth's water supply remains stable.