Matter in Our Surroundings - 9th Grade Science

Flashcards covering key concepts from the chapter on matter in our surroundings.

Space Between Particles

The amount of empty space distinguishing particles in solids, liquids, and gases.

Force of Attraction

The strength with which particles are attracted to each other; stronger in solids compared to gases.

Particle Arrangement

The organization of particles in a state of matter; closely packed in solids, less ordered in liquids, and far apart in gases.

Shape

The geometric form of a substance; fixed in solids, variable in liquids, and non-definite in gases.

Volume

The amount of space occupied by a substance; fixed in solids and liquids, non-definite in gases.

Compressibility

The ability of a substance to decrease in volume under pressure; solids are incompressible, liquids are slightly compressible, and gases are highly compressible.

Kinetic Energy

The energy possessed by an object due to its motion; varies by state of matter, with gases having maximum kinetic energy.

Example of Solid

Ice and iron, which have closely packed particles, fixed shape, and fixed volume.

Example of Liquid

Water and oil, which have particles that can move past one another and take the shape of their container.

Example of Gas

Air and helium, which have particles that are far apart, no definite shape, and can fill any container.