1. Intro to Biology

2. Goals Come up with a class definition of the term “science”
Explain the difference between scientific theory and law
Identify and understand the guidelines of science

3. Vocabulary Hypothesis – Statement or predictions that can be tested
Scientific theory – A well tested explanation of natural events
Scientific law – An observation that happens every time under a set of conditions
Applied science- the practical use of scientific information to improve human life
Pure science – The gathering of new information or the discovery of a new relationship or fact for sake of knowledge
Natural phenomena – An observable event that is not man-made; something that occurs in nature

4. What is science? Here are some definitions from the web:
“a branch of knowledge or study dealing with a body of facts or truths systematically arranged and showing the operation of general laws”
“systematic knowledge of the physical or material world gained through observation and experimentation”
“systematized knowledge in general”
“knowledge, as of facts or principles; knowledge gained by systematic study”
What do these definitions have in common? C C C C C C C C

5. What is Science? What will our definition be?
Science has a system or process
Science is knowledge
What will our definition be?

6. Something to consider Why do you think that is?
Science does not deal with the supernatural in any way
Supernatural: “attributed to some force beyond scientific understanding or the laws of nature”
Limited to natural explanations of how the world works
Why do you think that is?

7. Guidelines of science Scientific explanations come from: Observations
Evidence
Testing
Hypothesis must be testable:
Observation
Background knowledge
Logic
Science can change when new data is introduced
Scientific data and findings must always have gone through peer review and verification before being accepted.
Must be able to reproduce results

8. Characteristics of Life

9. Goals
To identify and explain the characteristics of life

10. How are all living things alike?

11. Characteristics Living things… Are made up of units called cells
Reproduce
Are based on a universal genetic code
Grow and develop
Obtain and use materials and energy
Respond to their environment
Maintain a stable internal temperature

12. 1. Cells-Smallest unit of life
Unicellular=1 cell
Multicellular=many cells

13. 2. Reproduce Sexual=2 different parents
Asexual=single parent (cloning, budding)

14. 3. Genetic Code
Directions for inheritance (DNA)

15. 4. Growth and Development
Growth=getting larger
Development=changing shape and structure
Differentiation=cells look different and perform different functions

16. 5. Use Energy Metabolism=chemical reactions in the body
Animals eat to obtain energy
Plants photosynthesize

17. 6. Response to Environment
Stimulus=signal
Response=reaction

18. 7. Stable internal environment
Homeostasis-maintaining constant internal conditions (sameness)

19. 8. Evolution
Changing over time

20. Viruses

21. Goals
Compare and contrast the structures and characteristics of viruses with living and non-living things

22. What is a virus? A microorganism
Can only reproduce by infecting a living cell
Enter the cell and use the machinery of the infected cell to
produce more virus
Surrounded by a protein coat called a capsid

23. Characteristic
Virus
“Living things”
Structure
Capsid
Cell
Reproduction
Only with host cell
Asexual or Sexual
Genetic Code
DNA or RNA
DNA
Growth and Development No
Yes
Obtain and Use Energy
Responds to Environment
Change over time (evolve)