Presentation on theme: " Matter- Anything that has mass and takes up space Substance – A single kind of matter that is pure, has a specific set of properties Examples: Table."— Presentation transcript:
Matter- Anything that has mass and takes up space Substance – A single kind of matter that is pure, has a specific set of properties Examples: Table Salt, Table Sugar, Baking Soda Not Examples: Flour, Milk, Eggs, Fruit
Physical Properties -characteristics of a pure substance that can be observed without changing it into another substance. Examples: Physical State, Texture, Color, Shape, Hardness, Flexibility, dissolves in water,luster, etc.
Freezing water A rusting nail Burning a log Digesting food A chameleon changing color Melting cheese
An element is a pure substance that cannot be broken down into any other substances. The basic particle of an element is an atom. Elements are the simplest substances Examples: Aluminum, Oxygen, Carbon, Gold, Silver, Sodium, Nitrogen, Neon When atoms combine they form a chemical bond (the force of attraction between two atoms). Molecules are groups of two or more atoms held together by chemical bonds.
When atoms combine they form a chemical bond (the force of attraction between two atoms). Molecules are groups of two or more atoms held together by chemical bonds. Examples: Water (H 2 O), Oxygen (O 2 ) Carbon Dioxide (CO 2 ) Carbon Monoxide (CO)
A compound is a pure substance made of two or more elements chemically combined in a set ratio. Ex: C0 2 or H 2 0 A mixture is made of two or more substances (elements, compounds, or both) that are together in the same place but are not chemically combined. Each substance in a mixture keeps its individual properties Example: soil, tossed salad, sand
Homogeneous Mixture: A mixture that is so evenly mixed that you can’t see the different parts Examples: Salt Water, Sugar Water, Brass Heterogeneous Mixture: A mixture in which you can see the different parts Examples: Damp Soil, Salad, Omlet
Use a magnet Filter the mixture Use distillation Evaporation
Mass- the amount of matter in an object Units are the kg or g Volume- the amount of space matter occupies. (formula: V= l x w x h) Units are L, mL, and cm 3 Density- the mass of a material in a given volume. (formula: mass/volume) Units are g/mL or g/cm 3
Solids - definite shape and definite volume Liquids - definite volume but no definite shape Gas - no definite volume and shape Plasma - a gas-like state consisting of a mixture of free electrons and atoms that are stripped of their electrons
Melting - change in state from a solid to a liquid. Melting point - particles of a solid substance are vibrating so fast that they break free from their fixed positions Freezing - change in state from a liquid to a solid. Freezing point - particles of a liquid are moving so slowly that they begin to form regular patterns.
Vaporization - particles in a liquid gain enough energy to form a gas Evaporation - vaporization that takes place at the surface of a liquid. Boiling - a liquid changes to a gas below and at the surface of a liquid Condensation - particles in a gas lose enough thermal energy to form a liquid Sublimation - particles of a solid do not pass through the liquid state as they form a gas