•  Science is a hands-on laboratory class. You will be doing many laboratory activities which require the use of hazardous chemicals. Safety in the science classroom is the #1 priority for students, teachers, and parents. To ensure a safe science classroom, a list of rules has been developed and provided to you in this student safety contract. These rules must be followed at all times.  Two copies of the contract are provided.  One copy must be signed by both you

• and a parent or guardian before you can participate in the laboratory. The second copy is to be kept in your science notebook as a constant reminder of the safety rules.  Proper laboratory technique is essential to the education of successful scientist.  Your success will depend on your attitude and conduct.  If you work with an attitude of rushing through, you will profit but little.  An interest in your work, an understanding of its purpose

• and a clear interpretation of your results are necessary factors for a good laboratory course.  The chemistry laboratory is a safe place to experiment if your are careful.  You must assume responsibility of the safety of yourself and your neighbors.  Following are some safety and procedural rules to help guide you in protecting yourself and others from injury in the laboratory.

A. Personal SafetyA. Personal Safety

1. Playing, eating or smoking is not 1. Playing, eating or smoking is not allowed in the laboratory.allowed in the laboratory.

• 2. Come on time. Teachers give preliminary laboratory instructions at the beginning of each period and accidents often occur because students failed to hear or heed the precautions given by their instructors.

3. When performing experiment, 3. When performing experiment, always:always:a. wear laboratory aprons/gownsa. wear laboratory aprons/gownsb. use safety gogglesb. use safety gogglesc. tie up long hairc. tie up long haird. follow all directions carefully.d. follow all directions carefully.

4. Study the experiment assigned before going to the laboratory. Never perform unassigned or unauthorized experiments without the consent or approval and presence of your instructor.

5. Double check the labels of 5. Double check the labels of reagent before using it. Explosions reagent before using it. Explosions are often caused by mixing the are often caused by mixing the wrong chemicals.wrong chemicals.

Reagent-a substance used to detect, Reagent-a substance used to detect, measure or react with another substance.measure or react with another substance.

6. To prevent cuts:6. To prevent cuts:a. Fire polish all sharp edges of broken or a. Fire polish all sharp edges of broken or

cut glass tubingcut glass tubing

b. do not use cracked or broken glasswareb. do not use cracked or broken glassware

c. always protect your hands with a towel c. always protect your hands with a towel or ragor rag

7. To prevent burns:7. To prevent burns: a. allow heated glass and iron ware a. allow heated glass and iron ware

enough time to cool before picking them enough time to cool before picking them up.up.

b. do not look into a test tube whose b. do not look into a test tube whose contents have been heated. contents have been heated.

c. never leave a lighted burner or any c. never leave a lighted burner or any other heat source unattended.other heat source unattended.

8. In handling chemicals, remember:a. not to taste chemicals unless specifically instructed to do so.

b. wash hands thoroughly

9. Immediately report accidents 9. Immediately report accidents (spills, cuts or burns) to the teacher.(spills, cuts or burns) to the teacher.

B. Cleanliness and Orderliness

1. Wash and dry used glass and porcelain ware at the end of each laboratory period.

2. Keep your work table clean. Wash off spills and wipe the surface dry.

•3. Label containers of chemicals.

•4. To avoid clogging the sink, throw solid wastes in the garbage cans.

C. Accuracy in Reporting Results

1. Record observations and data as soon as they are obtained.

Most Common Accident

If you are not using the equipment properly, or if horse-play is involved, you will be required to pay for the broken glassware.

The Teacher will collect the broken glass, not you. More minor cuts occur after this type of accident than during it.

If glassware is broken, stop where

you are. Report the breakage to the teacher

Correct Laboratory TechniqueCorrect Laboratory Technique

Use a glass rod when transferring Use a glass rod when transferring liquids from one container to liquids from one container to another, making sure that the rod is another, making sure that the rod is touching the side of the receiving touching the side of the receiving container.container.

Answer the following with a YES Answer the following with a YES or a NO.or a NO.

1. It is okay to eat when inside the 1. It is okay to eat when inside the Science Laboratory.Science Laboratory.

2. Label Chemicals.2. Label Chemicals.3. Do not look directly on the test 3. Do not look directly on the test

tube with heated chemicals in it.tube with heated chemicals in it.4. If a glassware is broken, keep it to 4. If a glassware is broken, keep it to

yourself.yourself.5. Study the experiment before 5. Study the experiment before

proceeding to the laboratory.proceeding to the laboratory.

1. Cite other safety rules inside the Science

Laboratory.

• 2. Give one safety rule that you remembered in today's lesson.

Assignment: Science 4Assignment: Science 4

What do you call the What do you call the “Framework of the Body”?“Framework of the Body”?

Assignment: Science 3

Lesson tomorrow: Getting familiar with Science Laboratory Apparatuses.