1. Properties of Life Figure 1.2 (c) Response to environment
(a) Organization
(d) Homeostasis
(g) Reproduction
(f) Growth and development
(b) Evolutionary adaptation
(e) Energy utilization

2. What is Biology? Biology We recognize life
Is the scientific study of life
We recognize life
By what living things do

3. Unifying Themes of Biology
Cell structure & function
Heredity (genetics)
Stability & homeostasis
Interdependence of organisms
Metabolism
Evolution
Reproduction 1. 2 5 3 4 7 6

4. Engineering & Design Process
Make observations
Ask questions 
Form a hypothesis
Test hypothesis
Analyze the results
Draw conclusions
Repeat

5. We use hypotheses in solving everyday problems!
Observations
Questions
Hypothesis # 1: Dead batteries
Hypothesis # 2: Burnt-out bulb
Prediction:
Replacing batteries
will fix problem
Replacing bulb
Test prediction
Test does not falsify hypothesis
Test falsifies hypothesis
Figure 1.25

6. Types of variables
Independent variable is the variable that is purposely changed (manipulated variable) Dependent variable is the variable that may change due to the manipulated variable and is observed (responding variable) Control variable is the variable that serves as the standard of comparison with another group or individual to which it is identical except for one factor (comparison variable)

7. 9/8 Do Now
In 1928, Sir Alexander Fleming was studying Staphylococcus bacteria growing in culture dishes. He noticed that a mold called Penicillium was also growing in some of the dishes. A clear area existed around the mold because all the bacteria that had grown in this area had died. In the culture dishes without the mold, no clear areas were present.
Fleming hypothesized that the mold must be producing a chemical that killed the bacteria. He decided to isolate this substance and test it to see if it would kill bacteria. Fleming transferred the mold to a nutrient broth solution. This solution contained all the materials the mold needed to grow. After the mold grew, he removed it from the nutrient broth. Fleming then added the nutrient broth in which the mold had grown to a culture of bacteria. He observed that the bacteria died.
Identify the problem.
What was Fleming's hypothesis?
What was the independent variable? The dependent variable?
Should the hypothesis be supported or rejected based on the experiment?

8. What is qualitative data?
What is quantitative data?
How do scientists represent data?

9. Theory vs. Law Hypothesis predicts. Theory explains. Law describes.
Theory - A well-tested explanation that unifies a broad range of observations. Supported by a large body of evidence. NOT ABSOLUTE
Law – A statement of fact that has been determined from observation, so that a scientific phenomena always occurs if certain conditions are present. ABSOLUTE