Agenda – 9/1/2015 Take out your notebook, name tent, and a pen or pencil! Tape/Glue notes outline in notebook (page 7) and SPMS (page 8) Bell-Ringer: Living vs. Non-living Exp Design notes Think-Pair-Share w/ shoulder partner Homer Scenario Homework: Syllabus/Lab Safety Contract, signature form on Moodle due by Fri. 9/4/15

1. On pages 1-4, divide the page into five sections to put your bell-ringers in this week (like below). 2. In the first box, Put the date and answer the bell question inside that box…We will use these entries for the next five weeks. Bellringers 1 Date Just like this!

1 1. Look around the room and write down FIVE observations you make. 2. Make a list of (at least 3) biotic factors in nature that can affect the survival of an organism. 3. Make a list of (at least 3) abiotic factors in nature that can affect the survival of an organism. IN THE FIRST SECTION OF YOUR BELL-RINGER PAGE ON PAGE 1. 9/1/2015

If a company wanted to test to see if a new medicine made to lower cholesterol worked or not, what would they need to do?

Section 1.2 Summary – pages An experiment that involves two groups: the control group and the experimental group. The control is the group in which all conditions are kept the same. The experimental group is the test group, in which all conditions are kept the same except for the single condition being tested. What is a controlled experiment?

Section 1.2 Summary – pages Suppose you wanted to learn how a certain fertilizer affects the growth of different varieties of plants. What is a controlled experiment? Your hypothesis states that the presence of this fertilizer will increase the growth rate of each plant variety.

Section 1.2 Summary – pages An experimental crop setup is designed to test the hypothesis. What is a controlled experiment? Fertilizer is present in the soil with the experimental plants, but not in the soil with the controls. All other conditions that are kept the same for both groups- soil, light, water- are constants

Section 1.2 Summary – pages The single thing in an experimental group that is different is the independent variable Think of the definition of “independent” Designing an experiment What is the independent variable in the plant experiment?

Section 1.2 Summary – pages During the experiment, the thing you are trying to measure is the dependent variable. Think of the definition of “dependent” The dependent variable occurs as a result of the independent variable Designing an experiment What is the dependent variable in the plant experiment? (What are we measuring as a result of the fertilizer)

Think about the observations you made in your bellringer…. Raise your hand and share one with me….

It is numerical data Quantitative data may be used to make a graph or table. 1. Quantitative Data (quantity) There are two different types of data that can be collected…

Section 1.3 Summary – pages Measuring in the International System In biology, the metric units you will encounter most often are: meter (length) gram (mass) liter (volume), second (time), and Celsius degree (temperature).

Observational data—written descriptions of what is observed. 2. Qualitative Data (quality) Qualitative data may be used to make sketches.

Section 2 Check A scientist conducts an experiment to test the effect of light on plant growth. In each experiment, pea plants are each given 10 mL of water. One plant is exposed to full sunlight for 8 hours, one is exposed to full sunlight for 4 hours, and one plant is kept in a dark room. Plant height is measured after two weeks. What is the independent variable in this experiment? Question 2 Quickly discuss with the person next to you: The difference between independent and dependent variables.

Section 2 Check The independent variable is the condition that is changed. In this case, the amount of sunlight is changed for each plant. Plant heights are measured results of the experiment, so plant height is the dependent variable.

Section 3 Check Explain the difference between quantitative and qualitative information. Question 3 Quickly discuss with the person next to you: The two types of data that can be collected in an experiment.

Quantitative information can be expressed numerically, and may also be used to generate graphs or tables in order to communicate data clearly. Qualitative information is written descriptions of what scientists observe, are qualitative information. Section 3 Check U.S. Students Enrolled in Physical Education Male Female

The Homer Scenario Homer notices that his shower is covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to check this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower. 1. What was the initial observation? 2. Identify the Control Group 3. Identify the Independent Variable 4. Identify the Dependent Variable 5. What should Homer's conclusion be? The Bart Scenario: Bart believes that mice exposed to microwaves will become extra strong (maybe he's been reading too much Radioactive Man). He decides to perform this experiment by placing 10 mice in a microwave f or 10 seconds. He compared these 10 mice to another 10 mice that had not been exposed. His test consisted of a heavy block of wood that blocked the mouse food. He found that 8 out of 10 of the microwaved mice were able to push the block away. 7 out of 10 of the non-microwaved mice were able to do the same. 6. Identify the Control Group 7. Identify the Independent Variable 8. Identify the Dependent Variable 9. What should Bart's conclusion be? 10. How could Bart's experiment be improved?