Ms. Hughes

Standard B-1:  Indicator: TSWBAT demonstrate an understanding of how scientific inquiry and technological design, including mathematical analysis, can be used appropriately to pose questions, seek answers and develop solutions.  Use appropriate laboratory apparatuses, technology, and techniques safely and accurately when conducting a scientific investigation.  Use scientific instruments to record measurement data in appropriate metric units that reflect the precision and accuracy of each particular instrument.  Use appropriate safety procedures when conducting investigations.

Be Prepared:  Before you enter a biology lab, you should be prepared for and knowledgeable about any lab exercises that are to be performed. That means you should read your lab manual to know exactly what you will be doing. Review your biology notes and relevant sections in your biology book before your lab begins. Make sure you understand all procedures and purposes, as this will help you understand the lab activities you will perform. It will also help you get your thoughts organized for when you have to write your lab report.

Be Neat:  When working in a biology lab, make sure you keep your area neat and organized. If you happen to spill something, ask for assistance when cleaning it up. Also remember to clean your work area and wash your hands when you are finished.

Be Careful:  An important biology lab safety rule is to be careful. You may be working with glass or sharp objects, so you don't want to handle them carelessly.

Wear Proper Clothing:  Accidents do happen in a biology lab. Some chemicals have the potential to damage clothing. With that in mind, you want to make sure that the clothing you wear is something you could do without if it becomes damaged. As a precaution, wearing an apron or lab coat is a good idea. You will also want to wear proper shoes that can protect your feet in case something gets broken. Sandals or any type of open-toed shoes are not recommended.

Be Cautious With Chemicals:  The best way to remain safe when dealing with chemicals is to assume that any chemical you handle is dangerous. Be sure you understand what type of chemicals you are using and how they should be properly handled. If any chemical comes in contact with your skin, wash immediately with water and inform your lab instructor. Wear protective eyewear when handling chemicals.

Wear Safety Goggles:  I know that safety goggles are not stylish and can fit awkwardly on your face, but they should always be worn when you are working with chemicals or any type of heating apparatus.

Locate Safety Equipment:  Be sure you know where to find all safety equipment in the biology lab. This includes such items as the fire extinguisher, first aid kit, broken glass receptacles, and chemical waste containers. Also be sure you know where all the emergency exits are located and which exit route to take in case of an emergency.

 Don’t eat or drink in the lab  Don’t taste any chemicals or substances you are working with  Don’t use your mouth for pipetting substances  Don’t handle broken glass with bare hands  Don’t pour chemicals down the drain without permission  Don’t operate lab equipment without permission  Don’t perform your own experiments unless given permission  Don’t leave any heated materials unattended

 Don’t place flammable substances near heat  Don’t engage in childish antics such as horseplay or pranks  Don’t Wear open toed shoes or shoes without backs  Don’t wear loose or baggy clothing  Report all accidents regardless of how minor to your teacher.  Work in the lab only when the teacher is present or when you have permission to do so.

 Never indulge in horseplay or behavior that could lead to injury of others.  Tie back long hair.  Wear glasses not contacts  ALWAYS ASK PERMISION BEFORE DOING SOMETHING!!!  Never add water to concentrated acid solutions. The heat generated may cause spattering. Instead, as you stir, add the acid slowly to water.  Return all lab materials and equipment to their proper places after use.

 Never smell a material in a test tube or flask directly. Instead, with your hand, "fan" some of the fumes to your nose carefully.  Never look directly into a test tube view it’s contents from the side  Upon completion of work, wash and dry all equipment, your lab bench and your clean-up area

o Precision is a measure of the degree to which measurements made in the same way agree with one another. o The accuracy of a result is the degree to which the experimental value agrees with the true or accepted value. o It is possible to have a high degree of precision with poor accuracy. This occurs if the same error is involved in repeated trials of the experiment.

 SIG FIGS:  1) ALL non-zero numbers (1,2,3,4,5,6,7,8,9) are ALWAYS significant.  2) ALL zeroes between non-zero numbers are ALWAYS significant.  3) ALL zeroes which are SIMULTANEOUSLY to the right of the decimal point AND at the end of the number are ALWAYS significant.  4) ALL zeroes which are to the left of a written decimal point and are in a number >= 10 are ALWAYS significant.

    1  400.

 Complete the handout located on your desk ◦ What did spongebob do that was wrong? ◦ You may highlight or underline.

 Review spongebob handout.  Review scientific method.  Review lab safety.

 Group 1 - Stations lab in the back. ◦ Complete the stations assigned.  Group 2 – Obsertainers  You must write down three observations about the containers you have in your group.You MAY NOT LOOK in the containers. ◦ Use all of your senses except taste and sight:  Smell  Feel  Hearing  Descriptive words: ◦ sound, sharp, dull, flat, round, heavy, light, liquid, solid, hard, soft, etc. ◦ You will be writing a report so take good notes!

 Accurate vs. precise measurement ◦ Review homework

 Design experiment for scientific foot race using scientific method  Collect data for foot race  Analyze data  Homework: write a lab report for the experiment we completed including your conclusion where you reject or accept your hypothesis.