Agenda 09-21-2015

1. Homework

2. Introduction

3. Set up Activity 3

4. Activity 3: A Plan to Separate the Mixture

ObjectiveStudents will be able to:

–Design a procedure to separate substances present in a mixture.

PurposeStudents will be able to:

–Apply the new knowledge to separate mixtures safely.

Homework

• Work on science fair project• Problem• Hypothesis• Variables

• Independent• Dependent• Controlled

What do you already know?

• Complete the form to show what you already know about the science words of the week.

Set Up Activity 3

• PRE-LAB: substance, element, compound.

• Read Introduction (p. A10)

Examples of Mixtures

Activity 3–Discussion:

• “Graphic Organizer: Substances”

• “Identifying Equipment”

• Procedure to Separate Mixtures

Follow Procedure pp.A11-A12.1. Observe the unidentified mixture.2. Record your observations in your

journal (Data).

Solution A

Solution BLong

cylinderShort

cylinder

Red tube

Black square

Follow Procedure pp.A11-A12.

3. Discuss with your group:– Ways to separate the mixture– Safety precautions– Tools and materials

4. Create a procedure to separate the mixture:5. Record the procedure (Data).6. Discuss how to remove any liquid left from the

solids.7. Record any additional steps.

Reading Activity

In your groups, work with a partner

• Read “Hazardous World”.• Use the words from the “word

bank” to complete the blanks.• On loose leaf paper, write the

numbers 1-13.• Write next to each number the

word, from the word bank, to complete the passage.

A Hazardous World

Directions: Use the words from the word bank to fill in the blanks for the passage below.

WORD BANK:

pure substances substances materials

hazardous dispose of corrosive ppm

hazmat team toxic flammable

biohazard oxidizers radioactive

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. 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. 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. 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. Adapted from: Newsela, 05.31.15 & IAPS, 2nd Edition.

Homework

• Work on science fair project• Problem• Hypothesis• Variables

• Independent• Dependent• Controlled