Warm up (p. 8): read and complete Reading Formulas w/s Date Session # Activity Page # 9/6-7 3 Matter Diagrams warm up 6 Elements, Compounds, Mixture Article & ?’s turned in and graded, you will get this back later 7 9/8,11 4 Reading a Formula 8 Classifying matter Comprehension Stations 9 Homework: 1. Complete Elements, Compounds & Mixtures worksheet 2. Watch “Separating Mixtures” assigned through Discovery Ed Go to: https://assignments.discoveryeducation.com/ Assignment code: T6507-4555

8.P.1 Understand the properties of matter and changes that occur when matter interacts in an open and closed container. 8.P.1.1 Classify matter as elements, compounds, or mixtures based on how the atoms are packed together in arrangements.

TLW finish reading article about classification of matter, answer questions based on the article. Classify matter using images and samples at stations, justify your response citing evidence from the sample.

Reading Formulas Elements & Compounds are written using chemical formulas 8 Chemical formulas represent the composition of a molecule or compound, like a recipe. Symbols identify which elements are in the substance. First letter of an element symbol is capital, any others are lower case. (just like your name) Subscripts identify how many atoms of a particular element are in a molecule. If an element in a formula does not have a subscript, then the subscript is 1

8 Reading Formulas symbol In the following example: H2O Subscript for H = 2. There are 2 atoms of Hydrogen in a single water molecule Subscript for O = 1. There is one atom of Oxygen in a single water molecule. subscript

8 In the example C6H12O6 Glucose Atoms of C in a single molecule of glucose: ______ Atoms of H in a single molecule of glucose: _____ Atoms of O in a single molecule of glucose: _____

Try these on your own: 8 NaHCO3

Review: Element, Compound, Mixture Element: Pure substance, atoms of one element Compound: pure substance, two or more different elements chemically bonded together Mixture: physical combination of substances Heterogeneous: you can see the different components, it is not the same throughout Homogeneous: components are equally distributed. Looks the same throughout (solution), it looks like one substance

Element, Compounds, Mixtures Text 1. Scan for unfamiliar Vocab 2. Second Read… What surprised you? What did the author think you already knew?

Element, Compound, Mixture? This is a mixture because the components are physically combined, you can separate them. It is a heterogeneous mixture because I can see the different components (lettuce tomato, peppers). Salad

But what if the mixture is a diagram and not the real thing? ? ? Some mixtures are described as heterogeneous because you can physically see the different components of the mixture. For example, if you don’t like mushrooms on your pizza, you can pick them off. Solutions are homogeneous mixtures, the particles of two or more substances are evenly distributed amongst each other. Solutions are homogeneous mixtures because they have the same appearance and properties throughout the mixture.

But what if the mixture is a diagram and not the real thing? Even distribution Uneven distribution of particles of particles

Element, Compounds, Mixtures Text 1. Scan for unfamiliar Vocab 2. Second Read… What surprised you? What did the author think you already knew?

Describing a Solution/Homogeneous Mixture concentrated, dilute, solvent, solute, saturated there is less of it solute solvent (water) there is more of it

Describing a Solution/Homogeneous Mixture concentrated, dilute, solvent, solute, saturated

Comprehension Stations Visit each station and describe what you see using as many vocabulary terms from the article as you can…(highlight the vocab terms in the article) These need to be scientific explanations!! Stations may have multiple explanations!! When you are finished: Complete the Elements, Compounds & Mixtures worksheet: 1. Identify each image as an element, compound or mixture. If you are unsure, circle each different substance in the image.

Station 1 Models please don’t open the jars. Examine each sample Station 1 Models please don’t open the jars!! Examine each sample. Based on what you observe, classify each sample as an element compound or mixture. If the sample is a mixture, is it heterogeneous or homogeneous? Explain. Model 1 Model 2

Station 2 Rock (Gneiss) Using the magnifying glass, examine the rock sample and the picture. Based on what you observe, classify the rock as an element compound or mixture. If it is a mixture, is it heterogeneous or homogeneous? Explain.

Station 3 KoolAid Classify KoolAid as an element, compound or mixture Station 3 KoolAid Classify KoolAid as an element, compound or mixture. If it is a mixture, is it heterogeneous or homogeneous? Explain. Explain, using scientific terms, why the KoolAid samples are not the same color.

Station 4 Diagram 1 Based on what you observe, classify Diagram 1 as an element, compound or mixture. If it is a mixture, is it heterogeneous or homogeneous? Explain.

Two different materials are physically combined.. Diagrams 2 and 3 represent possible outcomes.

Station 4 Diagram 2

Station 4 Diagram 3

Station 5 Cereal Classify cereal as an element, compound or mixture Station 5 Cereal Classify cereal as an element, compound or mixture. If it is a mixture, is it heterogeneous or homogeneous? Explain.

Station 6 2 beakers of salt water Classify salt water as an element, compound or mixture. If it is a mixture, is it heterogeneous or homogeneous? Explain. Explain, using scientific terms, why salt water sample 2 has salt at the bottom of the beaker. sample sample 1 2

Station 7 Classify the substance(s) in the beaker as element, compound or mixture. If a mixture, classify as heterogeneous or homogeneous. Explain. Bonus question- Explain why the following statement is true: “Technically, the beaker is always full” water

Station 8 Examine each sample Station 8 Examine each sample. Based on what you observe, classify each sample as an element, compound or mixture. If the sample is a mixture, is it heterogeneous or homogeneous? Explain. Sample 1 Sample 2 Aluminum Al Iron Fe