1. What is the difference between and qualitative and a quantitative observation? 2. What kind of observations are you making in the measurement lab?
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1 DO NOW: SWBAT identify different variables within an investigation Enter Silently Grab Materials, notebooks, folders Begin Do Now 1. What is the difference between and qualitative and a quantitative observation? 2. What kind of observations are you making in the measurement lab?
2 Finish Measurement Scavenger Hunt You ll have 20 minutes to complete the scavenger hunt Work with urgency
3 Conclusion Ticket 1. What is the mass of this object? 2. What tool would a scientist use to measure Mass? 3. What is the measurement on the graduated cylinder? 4. What tool would you use to measure the materials in the table. Type of Material Stone Rock Gravel Quartz >600mm mm mm mm mm
4 Check what clicker number you have by looking in the top left corner of the front cover of your notebook Do Now When Mr. Wallace calls your group, come grab you clickers. (Mass) (Acceleration) = Force
5 Do Now Is the following statement an inference, a qualitative observation, or a quantitative observation? Look a U.F.O., there must be aliens in it.
6 Why is this important? The Scientific Method It gives scientists an outline to test each other s results, and critique it for accuracy
7 HYPOTHESIS: testable prediction used to guide the design of an experiment CONTROL: Standard for Comparison CONSTANT: Factor in the experiment that is kept the same INDEPENDENT VARIABLE: Factor that is adjusted by the experimenter (you change this about the experiment it s something you choose) DEPENDENT VARIABLE: Factor whose value depends on the independent variable (effect you measure during experiment)
8 Which is the independent and which is the dependent variable? How do different liquids affect plant growth?
9 Notes Variables Example: the liquid used to water each plant Example: the height or health of the plant 1. What are the constants? 2. What is the control?
10 Which is the independent and which is the dependent variable? The amount of time it takes you to get out of bed in the morning and the amount of sleep you got last night.
11 Which is the independent and which is the dependent variable? The number of days since your last hair cut and the length of your hair
12 Plant Example Constants? Control? Variables? Think-Pair-Share What are the constants? What is the control? What is the dependent variable? What is the independent variable?
13 Hypothesis Writing Written in an If, Then, Because statement No Personal pronouns Independent variables go after IF Dependent variables go after THEN Reasoning goes after BECAUSE EXAMPLE 1. If hair is colored (what will change= independent) 2. Then colored hair will grow less (what will happen/ what is measured = dependent) 3. Because hair color has harsh chemicals that damage hair preventing growth.
14 Example Hypothesis If, then, because statement Experiment Question = Does increased sleep cause higher grades? Hypothesis If the amount of sleep is increased then the grade average of students will increase because sleep allows students to be alert and focused in class.
15 In the Homework: Highlight the following: If = What is changed about the independent variable Then = what happens to the dependent variable Because = explain why the dependent will change
16 Practice Identify the parts of the experiment Write a hypothesis based on the question for each experiment. Highlight the independent variable Underline the dependent variable
17 DO NOW: SWBAT identify different variables within an investigation Enter silently Grab materials, notebooks, folders Begin do now Write these questions down 1. What is the control? 2. What are the constants? 3. What is the independent variable? 4. What is the dependent variable?
18 House Keeping Sub Homework Hypothesis Writing Struggles?
19 Gobbstopper Lab 1. Read the procedures carefully 2. Fill out the pre-lab questions 3. Create a data table for your qualitative and quantitative observations. Before and after experiment observation data table (what is diameter? How can we measure the mass?) 4. Write your hypothesis Once you have finished, and have read the procedures, show your lab report to me and I will okay you to begin your lab.
20 Do Now
21 Gobstopper Day 1 Keep volume at a 3 during lab When you have finished the lab, you need to CLEAN UP! 1. Pick all gobstoppers out of petri dish and THROW THEM AWAY 2. Pour liquid down the drain and RINSE petri dish 3. DRY petri dish with paper towel 4. BRING dried petri dish and stop watch back UP TO THE FRONT 5. Make sure your lab table is cleaned up completely!
22 Answer the questions on the conclusion section of your lab sheet. (no personal pronouns!) What were the results (was your hypothesis correct? Why or why not?) What can we claim our liquid did to the Gobbstopper? (no personal pronouns) What are some pieces of evidence? (no personal pronouns) What is our reasoning? (no personal pronouns- uses scientific ideas or facts)
23 Claim, Evidence, Reasoning Whenever you make a claim You must support it with evidence and reasoning. Example of a bad C.E.R. The liquid made the Gobbstopper dissolve. Example of a good C.E.R. The liquid made the Gobbstopper dissolve as evidenced by the mass and diameter values decreasing from 2g to.5g, and 2cm to.8cm, because the Gobbstopper is made of sugar, and sugar is soluble in most liquids.
24 Write your own C.E.R. for the Lab
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