8 th Grade ScienceRSM Go to work station 1 or 2 and get the following items  One small dry-erase board  One dry-erase marker  A paper towel  Wait for further instructions To do: A) Celebrate birthdays B) Remind about reward "parties" Feb 7, 2013

What is a Mixture? WW hen you combine two or more substances together, if no chemical reaction occurs then it is called a mixture NN OTE: A mixture may contain 1 or more compounds, as long as they do not react with each other (( like Koolaid…see example below) MIXTURE EXAMPLES: Koolaid… Pizza… When you combine cheese, tomato sauce, and dough, these items do not chemically react with each other. Notes When you combine water (a compound) and Koolaid powder (sugar, flavoring, & coloring) these items do not chemically react with each other. SPI Mixtures or Compounds PRESS THE RIGHT-ARROW BUTTON ON YOUR KEYBOARD TO ADVANCE THROUGH THE PRESENTATION

More About Mixtures:  Any changes you observe in a mixture are only physical changes…no new substances are formed.  Mixtures can be fairly easily separated back into the individual ingredients More Mixture Examples : Red Bull  …is merely a combination of water and other ingredients Air  …is merely a combination of nitrogen, oxygen, & other gases Steel  …is merely a combination of iron and carbon Notes SPI Mixtures or Compounds No chemical reaction occurs

What Is A mixture?  a combination of two or more substances that ARE NOT chemically combined  No chemical reaction occurs!  Unlike a compound… …a mixture can be fairly easily taken back apart  EXAMPLES:  Soup, Soft drinks (Coke, Pepsi, etc.), Tea, Hamburgers, Koolaid Drinks, pizza, etc Notes No precipitate is formed No smoke No fizzing or foaming No explosion No heat or light given off SPI Mixtures or Compounds

Key Point About Mixtures MM ixtures can be fairly easily taken back apart NN o chemical reaction occurs! More Mixture Examples: SS oup, Soft drinks (Coke, Pepsi, etc.), Tea, Salads, Soil (dirt), Perfume, Cologne, Bronze, etc Notes No precipitate is formed No smoke No fizzing or foaming No explosion No heat or light given off SPI Mixtures or Compounds

What Is a Compound?  …is made up of atoms of two or more different elements that are chemically bonded via a chemical reaction. More Compound Examples: Water (Hydrogen Oxide) Battery Acid (Hydrogen Sulfate) Table Salt (Sodium Chloride) Table Sugar (Sucrose) Rust (Iron Oxide) Chalk (Calcium Carbonate) Notes SPI Mixtures or Compounds

Review Activity Is this an element, compound, or mixture? Write a capital E if you think it is an element Write a capital C if you think it is a compound Write a capital M if you think it is a mixture Ar (Argon) Why?...is a pure substance, consists of only one type of atom Element

Is this an element, compound, or mixture? Write a capital E if you think it is an element Write a capital C if you think it is a compound Write a capital M if you think it is a mixture Monster Energy Drink Why…ingredients DO NOT chemically combine Ingredients: Water, sugar, coloring, and flavor Review Activity Mixture

Is this an element, compound, or mixture? Write a capital E if you think it is an element Write a capital C if you think it is a compound Write a capital M if you think it is a mixture C 6 H 12 O 6 (Glucose) Why?...has 3 atoms chemically bonded together Review Activity Compound

Is this an element, compound, or mixture? Write a capital E if you think it is an element Write a capital C if you think it is a compound Write a capital M if you think it is a mixture Chicken Soup Why…ingredients DO NOT chemically combine Ingredients: Water, chicken, vegetable, noodles, salt, etc. Review Activity Mixture

Is this an element, compound, or mixture? Write a capital E if you think it is an element Write a capital C if you think it is a compound Write a capital M if you think it is a mixture CO 2 (Carbon Dioxide) Why?...has 2 atoms chemically bonded together Review Activity Compound

Is this an element, compound, or mixture? Write a capital E if you think it is an element Write a capital C if you think it is a compound Write a capital M if you think it is a mixture Uut (Ununtrium) Why?...is a pure substance, consists of only one type of atom Review Activity Element