Agenda Introduction 2. Homework 3. Activity 5: Separating the Substances in the Mixture (Part 2) 4. Science Terms Week 2 & 3 Review 5. Exit Slip 5

Activity 5: Separating the Mixture. Objective Students will be able to: –Apply a procedure, designed previously, to separate substances present in a mixture

Activity 5: Separating the Mixture. Purpose Students will be able to: –Transfer their knowledge when separating substances present in a mixture.

Homework –Analysis Questions 1 & 3, Activity 5, p.A20 –Work on projects: Science fair Hispanic Scientist/Inventor

Properties of Substances Physical PropertyChemical Property Never changes. No matter the size of the sample Examples: color, texture, density, flexibility Result or change due to a chemical reaction Examples: color change, pH, bubbling Help identify a substance

Properties of Substances Properties observe in the substances separated from the unidentified mixture: Physical properties –Appearance –Density Chemical properties –Corrosiveness –Flammability –Toxicity

Chemical Data Safety Sheet SubstanceMaterial (name) Physical CharacteristicsHazards (Chemical Properties)Safety Precautions AppearanceDensityCorrosive/ Reactive FlammableToxic Liquid A Liquid B Red Tube Black Square Short metal cylinder Long metal cylinder Follow steps 1-6, p. A20 Complete Data

Chemical Data Safety Sheet SubstanceMaterial (name) Physical CharacteristicsHazards (Chemical Properties)Safety Precautions AppearanceDensityCorrosive/ Reactive FlammableToxic Liquid A Liquid B Red Tube Black Square Short metal cylinder Long metal cylinder colorless oily orange/red watery red cylinder black square dark gray light gray

What do you already know? Review the “Cloze Activity” about the science words at the end of Week 2.

“A Hazardous World”: Cloze Activity WORD BANK: pure substancessubstances materials hazardousdispose ofcorrosive hazmat teamtoxicflammable biohazardoxidizersradioactive mixture Our world is filled with different substances. The liquids we drink, the air we breathe and the roads we walk are all made of ____(1)_____ or different combinations of them. Some of these substances, called _____(2)____, are used to make specific products. Each material has unique properties that identify it and determine its use. pure substances materials

“A Hazardous World”: Cloze Activity WORD BANK: pure substancessubstances materials hazardousdispose ofcorrosive hazmat teamtoxicflammable biohazardoxidizersradioactive mixture Sitting for a relaxing manicure could be more ____(3)____ than we realize. Close to 400, 000 nail technicians in the nation are exposed to chemicals in the polish, glue and other salon products at close distance from their faces and in poorly ventilated places. When combined, these substances can react as ____(4)____ and cause even greater harm. Every day, technician and customers inhale these chemicals. Even though it is difficult to know how these chemicals affect the body, we do know that they can be ____(5)____ if absorbed through the skin. Another problem resulting from the use of hazardous chemicals is to ____(6)____ them. If a spill occurs, the ____(7)____ must be called to handle the emergency situation. hazardous oxidizers toxic dispose of hazmat team

“A Hazardous World”: Cloze Activity WORD BANK: pure substancessubstances materials hazardousdispose ofcorrosive hazmat teamtoxicflammable biohazardoxidizersradioactive mixture Some substances like water are considered _____(8)____. For example, when combine with acids, water can destroy other materials by contact. Other hazard posed by chemicals found in nail salons is the tendency these products have to catch fire. In other words, they are ____(9)____. Good ventilation, proper handling of the products and proper storage are key factors to prevent dangerous situations like the formation of toxic fumes. These ___(10)____of hazardous chemicals can make people pass out or even kill them due to the lack of oxygen. corrosive flammable mixture

“A Hazardous World”: Cloze Activity WORD BANK: pure substancessubstances materials hazardousdispose ofcorrosive hazmat teamtoxicflammable biohazardoxidizersradioactive mixture Humans can be exposed not only to harmful _____(11)____. In some situations, the harm comes in the form of an infection or disease that is transmitted purposely. In this case, one refers to a ____(12)____. In other situations, devices are built to carry ____(13)____ substances that, once released into the environment, can kill living things or cause cancer due to direct exposure. Some nations have use these agents as war weapons. In the search of improving our quality of life, humans have created a hazardous world. It is important to learn about the types of hazards we can face and how we can protect ourselves from dangerous situations. substances biohazard radioactive

What do you already know? Complete the activity to show what you already know about the science words from week 3.

Exit Slip How do you separate solids from liquids present in a mixture? Explain.