NO TALKING! Drill Quick Quiz OPEN NOTES!!! 5 min to complete Place in the bin when finished. OPEN NOTES!!! NO TALKING!

Objective SWBAT: Complete a gallery walk activity in order to identify different types of matter.

SAT Enrichment/HSA Question Horses have 64 chromosomes in each body cell. If a horse cell undergoes meiosis, how many chromosomes should be in each gamete? 16 32 64 128

Demo States of Chocolate Purpose: Materials: Students will observe three states of matter when chocolate is heated. Materials: Piece of solid chocolate, small beaker, large beaker, hot plate, glove Safety: Use a thermal mitt while handling the boiling water.

Demo Procedure: Question: Show students pieces of solid chocolate. Place them in small beaker surrounded by boiling water in a larger beaker. Question: How many physical states can you discern in the mixture? Explain.

Outcome Explanation Three states can be discerned as the chocolate melts. Solid Liquid Vapor (your ability to smell the chocolate means that some components of the mixture must have vaporized)

20 MIN! Quick Lab Separating Mixtures Purpose: To separate a mixture using paper chromatography. When finished place in the bin. 20 MIN!

Elements, Compounds, and Mixtures What’s the difference??

Mixtures Panning is one way to separate gold from a mixture of gold and materials such as sand or gravel. A pan containing the mixture is place underwater and shaken vigorously from left to right. You will learn how to classify and separate mixtures.

Classifying Mixtures A mixture is a physical blend of two or more components. A salad bar provides a range of items. Customers choose how much of each item to use in their salads. Each salad has a different composition.

Classifying Mixtures Based on the distribution of their components, mixtures can be classified as heterogeneous mixtures or as homogeneous mixtures.

Heterogeneous Mixtures A mixture in which the composition is not uniform throughout is a heterogeneous mixture

Another name for a homogeneous mixture is a solution. Homogeneous Mixtures A mixture in which the composition is uniform throughout is a homogeneous mixture. Another name for a homogeneous mixture is a solution.

phase The term phase is used to describe any part of a sample with uniform composition and properties. A homogenous mixture consists of a single phase. A heterogeneous mixture consists of two or more phases.

What type of phase is created? When oil and vinegar are mixed they form layers, or phases. The oil phase floats on the water phase.

Differences in physical properties can be used to separate mixtures. Separating Mixtures Differences in physical properties can be used to separate mixtures.

Filtration The process that separates a solid from the liquid in a heterogeneous mixture is called filtration. A colander is used to separate pasta from the water in which it was cooked. This process is a type of filtration.

Distillation During a distillation, a liquid is boiled to produce a vapor that is then condensed into a liquid

Compare and contrast a homogeneous and heterogeneous mixture. Review Compare and contrast a homogeneous and heterogeneous mixture.

Elements and Compounds Take two pounds of sugar, two cups of boiling water, and one quarter teaspoon of cream of tartar. Add food coloring and you have the sticky, sweet concoction known as cotton candy. You will learn how substances are classified as elements or compounds.

Distinguishing Elements and Compounds An element is the simplest form of matter that has a unique set of properties. A compound is a substance that contains two or more elements chemically combined in a fixed proportion. Compounds can be broken down into simpler substances by chemical means, but elements cannot.

Breaking down compounds A chemical change is a change that produces matter with a different composition than the original matter. When table sugar is heated, it goes through a series of chemical changes.

Distinguishing Substances and Mixtures If the composition of a material is fixed, the material is a substance. If the composition of a material may vary, the material is a mixture.

Flowchart for classifying matter

Symbols and Formulas Chemists use chemical symbols to represent elements, and chemical formulas to represent compounds. These chemical symbols were used in earlier centuries.

Each element is represented by a one or two-letter chemical symbol.

Questions Which of the following is a mixture? sodium chloride carbon dioxide sucrose air Passing an electric current through a certain substance produces oxygen and sulfur. This substance cannot be a(n) compound. mixture. element. solution

Gallery Walk What really Matter? 10 min Each sample is either Walk around the room to each lab station. Copy each sample in the example column. Identify the type of matter List your reasons for your classification. Each sample is either Element Compound Homogeneous mixture Heterogeneous mixture

Guided Reading worksheet As a class complete the guided reading worksheet by using your notes. 15 min

Summary: 1. Did we complete the objective? Explain. 2. How can mixtures be classified? 3. How can mixtures be separated? 4. Compare and contrast elements, compounds and mixtures 5. Identify the method used by chemists to represent elements and compounds? Homework: Matter-Substances vs. Mixtures