Unit 1 (Scientific Skills), Day 4 Dimensional Analysis and Scientific Method

Agenda Catalyst (7 min) Dead Sea Video (5 min) Annotating (20 min) Oil and Water Demo (3 min) Class Data Table (3 min) Break (7 min) Procedure Planning (20 min) Conduct Experiment (15 min) Debrief Experiment (Vocabulary) (3 min) Homework (2 min)

Beginning of Class Seating Place all bags and purses under tables Remember that seats are subject to change based on teacher discretion Place all bags and purses under tables Materials needed for today: Notebook Pencil Red Pen Black or Blue Pen

Catalyst (7) If you could go to anyplace in the world: Where would it be and why? What activities would you want to do there? How long would you want to stay? Who would you want to bring with you? Using complete sentences, write 5-7 sentences. Take Attendance

Dead Sea Video (5) http://www.youtube.com/watch?v=ZhL68D9BPiw

Annotating (1) Today we are doing an experiment Whenever you receive a text, you are expected to annotate it in order to break it down and make it easier to understand Annotate: Adding your own notes to question a text, comment on a text, or explain a text.

Annotating (1) In this class: Done with a red pen Define the bolded words using your understanding of the text If something confuses you: Put a big ? mark and write your question. If something is worth remembering: Put a big ! mark and write why it is important. BOX actions for you to do.

Annotating Example (3) Paragraph 1: Buoyancy in large bodies of water is the tendency for something to float and is closely linked to salinity, which is the concentration (amount) of salt in a specific amount of water. How can we predict the salinity of water necessary for an object to be buoyant upon it? What is salinity and how can we use dimensional analysis (unit conversion) to compare the salinity of different bodies of water?

Annotating – Your Turn! (15 min) Work silently on paragraph 2. After 2 minutes, work as a class. Paragraph 3 Paragraph 4 Paragraph 5, 6, 7 Paragraph 8 Red Pen Define Bolded Words Confused: ? Mark + Question Important: ! Mark + Statement Box Actions

Demo (3 min) Oil and Water Same Volume: space they take up (1 cup) Oil is less dense than Water Water: 1 cup of water weighs 236.6 grams Density = ?? Oil: 1 cup of oil weighs 219.6 grams Same Volume: space they take up (1 cup) Different Mass: amount they weigh (grams)

Lab Write In your lab notebook (upside-down and backwards) Using black or blue pen ONLY If you make a mistake, use a single line to cross it out. DO NOT SCRIBBLE!  very unprofessional Do steps 1 and 2 of the Lab Write Instructions (Paragraph 8)

Lab Write Leave space for Part 3 (Procedure)

Class Data Table (3 min) Part 4 of Lab Sample 1 Sample 2 Sample 3 Amount of Water (cups) Amount of Salt (tablespoons) Distance of Egg from Bottom of Cup (centimeters)

Experiment Groups Split your table in half (approximately) Two groups per table

Break 7 minutes break Be back on time!

Procedure Planning – Yellow Paper Using all of the supplies, design a procedure that accurately measures the data needed for the table we created. You must get the procedure approved by Mrs. Larkin. Lack of detail (example: put egg in cup. How fast, with what, etc?) will result in a veto from Mrs. Larkin. When yellow paper is approved, copy it into your notebook (part 3). If you make a mistake, use a single line to cross it out. DO NOT SCRIBBLE!  very unprofessional

Conduct Experiment Follow the procedure If you make any changes to the procedure in the experiment, you MUST NOTE THEM! Record your data as you conduct the experiment.

Debrief Experiment Constant: Part(s) of each sample kept exactly the same. Independent Variable: Part of each sample changed on purpose. THE CAUSE. Dependent Variable: Part of each sample that is measured. THE EFFECT. Control Group: Group that each sample was compared to. Experimental Group: Group(s) where the independent variable was added or changed.

Math Portion Homework Due Friday, 8/30 Finish Parts 1-4 of Lab Write Parts 5-6 will be done on Friday

Lab Outline With a paperclip, clip the lab outline to the lab write.