Do Now: What type of butterfly came from this cocoon?

Scientific Method Scientific inquiry starts with an observation –A direct method of gathering information in an orderly way Combine with what you know –Inferences

Scientific Method Universal way In which scientists Gather information And answer questions

Steps: 1. Make an observation & inference 2. Form a hypothesis 3. Conduct an experiment 4. Gather & Analyze data 5. Report Conclusions 6. Perform additional experiments if necessary

1. Make an observation & use inferences

2. Form a hypothesis –A testable explanation of a situation

3. Conduct an experiment Investigation in a controlled setting Control group –Non-changing group used for comparison Experimental group –Group exposed to the variable being tested

4. Gather & Analyze data Information collected –Quantitative –Qualitative

For graphing results: Factor that changes: –Independent variable (x-axis) Factor that depends on the independent variable –Dependent variable (y-axis)

Then… 5. Report Conclusions 6. Perform more experiments if needed

Tentative Homework ??? 1. Beri Beri Worksheet 2. Redi Jar Worksheet 3. Text p

Do Now: What is biology? Relate these items to the study of biology.

Chapter 1 - The Study of Life What is Biology?

Biology Study of life that seeks to provide understanding to the natural world –Greek words Bios = Life Logos = Study

In biology you will study… 1. Origin of living things 2. Structures of living things 3. How living things interact with one another 4. How living things function

What do biologists do? Medical Research –Treatment and prevention of diseases Conservation –Prevent extinctions Develop technologies Improve agriculture

Characteristics of living Organisms For something to be considered an organism it needs to have… 8 characteristics

1. Made of 1 or more cells –Ex: Amoeba, bird –Cell is basic form of life 2. Organization –Ex: atoms --> molecules --> tissues –Arranged in orderly way

3. Grows & Develops –Ex: Tadpole --> frog Growth –Starts as a single cell –Organisms grow at different rates & increase in mass –Development all changes in the lifespan of organism Q&A: What changes have occurred in your life to ensure your growth and development?

4. Reproduces –Pass traits to offspring –Essential for continuation of species

5. Responds to stimuli –Hot, cold, running away Stimulus- anything in internal/external environment that causes an organism to react Response- an organisms reaction to a change in its internal/external environment Q&A: What is the environment?

Homework: Bring in picture of organism responding to stimuli. –Label the stimulus –Label the response

6. Requires energy –Ex: Food Energy- ability to cause change. Use energy to perform biological acts

7. Homeostasis –An organisms regulation of internal environment (body temperature) in order to survive –Stability –Examples? sweating, shivering

8. Adapts and evolves –Changes in an organism that make it more suitable to survive in a given environment –Will pass on favorable traits to offspring –Ensures survival of species –Leads to Evolution! Evolution- gradual changes in species over time!

Evolution!

Revisit: What is biology? Now, using what we have just discussed, relate the items in the front of the room to your study of biology.