Biology Unit One Mrs Pearsons First Semester Biology

Biology Unit One Mrs. Pearson’s First Semester Biology *For those watching by recording, watch for questions on the slides throughout the presentation. Email me the answers to the questions within two days of the lesson being presented in order to receive credit for watching the recording.

Biology Olympics! Word parts can give you clues to a word’s meaning “Transgenic bacteria can make hnuman insulin to treat people with diabetes. Transgenic sheep and cows can make human antibodies and proteins. ” What does “transgenic” mean? Take the word apart… Trans… genic… **Those watching by recording, include in your email the definition of transgenic.

Unit One Objectives • Complete the Unit One Scientific Method Lab

Unit One How to find the lab • You have to click this one in the menu on the left side of your screen to access it.

Unit One Read the material • You need to read ALL the material so you are ready for the lab quiz, but we will go over some of the highlights today so we can complete the lab itself. • The first section is on the scientific method which you have seen many times and in different formats. • Be aware that steps can be and usually are repeated **Those watching by recording, include in your email why steps are repeated.

Unit One Read the material • Notebook Activities – as you go through the lab, these are questions you are asked to answer – you DO end up having to submit them on the lab report form for credit. • Type some examples in the chat box – be sure you include at least 3 in your report (several is more than one or two).

Unit One Read the material • The next section covers the metric system – again, you’ve been exposed to this many times previously but it’s a good idea to brush up on it if you are unsure.

Unit One Read the material • The next section covers the metric system – again, you’ve been exposed to this many times previously but it’s a good idea to brush up on it if you are unsure. • Let’s do some practice with the metric system… mm 1/1000 cm 1/100 m 1 Km 1000 • If I have 2 meters, how do I find out how many centimeters I have? • What if I want to know how many millimeters that would be? If I start with meters, what do I multiply by? • If I started with the 200 centimeters, what would I multiply by to get to millimeters? • Remember you are just moving decimal places to get your answer – always think about whether you are looking at the next bigger or smaller

Unit One Finish the actual problems • You are headed for the breakout rooms to solve the following problems: • You will have 15 minutes to finish off the problems – don’t worry if you don’t get them all done, focus on making sure the members of your group are comfortable doing the conversions. You can finish up on your own time if you need to.

Unit One Read the material • The next section of the reading describes different types of lab equipment commonly in use. Read over this section and be familiar with the types of equipment for your quizzes. • Part two starts out talking about Avagadro’s number and a mole of atoms – don’t worry too much about this part. It’s a way we refer to a large number of atoms – like a dozen eggs is actually 12, a mole of atoms is 6. 02 x 10 to the 23 rd. You will NOT be quizzed on this and I wish they hadn’t included it when they are not having you do anything with it. Sigh. • I believe what they were actually after was to explain to you that we can make different strengths of mixtures and then we refer to it as a certain Molar strength which refers back to using the concept of Avagadro’s number. Again, don’t worry about it – you will learn this concept if you go on in Chemistry. **Those watching by recording, include in your email the number we call Avagadro’s.

Unit One Read the material • Next… Let’s start the lab!!! • You access the lab report by clicking on this link:

Unit One The lab report form • Fill in all parts of the form – remember the purpose is given to you in the objectives • Why do we add salt to water when boiling pasta? We are going to work with temperature so we need to write an hypothesis that is related to what adding salt to water will do. Write it as an “if… then… because” statement • “If we add _______ salt to water, then the temperature will _____ because ______”

Unit One The lab report form • Easy points… just fill in what they listed in the Materials list and copy down the procedure…

Unit One Do the lab!! • Now for the fun stuff… gather your materials… • IF you do not have access to a digital thermometer, send me an email and I will provide you with data you can use to finish out the lab. **Those watching by recording, include in your email what you should do if you don’t have a digital thermometer.

Unit One Do the lab!! • … and DO the lab! • You are essentially checking the temperature at which water boils – first just water, then water with one tablespoon of salt, then two, then three tablespoons. • Remember to fill out the chart and…

Unit One Do the lab!! • …make your graph! • Be sure you label the axis so I know which is showing the temperature and which is showing your different samples.

Unit One Finish the Report • The analysis section: • In science, all results have to be backed up by the data – this is what we do when we complete an analysis – we look at what we can tell from the data. • It’s okay if your hypothesis was not supported – we learn just as much from results that don’t support our original idea as from ones that do. • Use your graph to estimate or predict the boiling point for a solution with 2 ½ tablespoons of salt then run the experiment and see how close your estimation was to the actual data.

Unit One Finish the Report • Conclusions – Now look back at your purpose for doing the lab. Did you answer the question(s) you had and what did the data show? • Be sure you answer the question in bold – use your graph to help you explain your answer.

Unit One Finish the Report • Final questions… • What do you think? Did we have a control? • Which factor did we control? • Which factor responded to the changes we made?

Unit One Review • Access the lab using the menu on the left side of the screen in the Biology home page • Read all the material there • Complete the lab • Fill out the lab report form • Turn it in! • Once you have completed the lab, you are also ready to do the lab quiz and the Unit One Section One Quiz.

Unit One Questions?