Define Key Vocabulary: Kinetic Theory States of Matter Thermal Expansion Amorphous Solids: Liquid Crystals Crystal lattice Melting point

Kinetic Theory: The kinetic theory of matter explains the behavior of particles in different states of matter. It states that all matter is composed of tiny particles that are in constant motion. The theory also explains how the motion of these particles affects the properties of matter, such as temperature and pressure.States of Matter: Matter exists in three main states: solid, liquid, and gas. Solids have a fixed shape and volume, liquids have a fixed volume but can change shape, and gases have neither a fixed shape nor volume.Thermal Expansion: Thermal expansion is the tendency of matter to change its shape, area, and volume in response to a change in temperature. When a substance is heated, its particles move faster and occupy more space, causing the substance to expand.Amorphous Solids: Amorphous solids are solids that do not have a regular arrangement of particles. They lack a crystal lattice structure and have a random, disordered arrangement of particles. Examples of amorphous solids include glass and plastic.Liquid Crystals: Liquid crystals are a state of matter that has properties between those of a liquid and a solid. They have a definite shape but can flow like a liquid. Liquid crystals are used in various applications, such as displays and thermometers.Crystal Lattice: A crystal lattice is a regular, repeating arrangement of atoms or molecules in a solid. It is the structure that gives a crystal its shape and determines its physical properties. The atoms or molecules in a crystal lattice are arranged in a specific pattern, with each atom or molecule bonded to its neighbors.Melting Point: The melting point is the temperature at which a substance changes from a solid to a liquid. It is the temperature at which the particles in a solid have enough energy to overcome the forces holding them together and begin to move more freely as a liquid.