1. The Science of Biology Chapter 1
Mrs. Norris
Spring 2013

2. Vocabulary: Write This Down on Chapter 1 Glossary Page!
Science- an organized way of using evidence to learn about the world
Inference- a logical interpretation based on prior knowledge or experience
Hypothesis – a scientific explanation for a set of observations
Theory- a well-supported, well-tested hypothesis that unifies a broad range of observations. Not absolute.

3. What is Science?
The goal of science is to investigate and understand nature, to explain events in nature, and to use those explanations to make useful predictions.

4. What is Science?
SCIENCE is an organized way of using evidence to learn about the natural world.
The word SCIENCE also refers to the body of knowledge that scientists have built up after years of using this process
Science is a way of knowing – an ongoing process that questions the world around us.

5. Biology= The Study of the Living World Bio- (Life) -logy (Study of)

6. Observation
The work of scientists begins with making careful observations– the process of gathering info about events or processes in a careful and orderly way.
Generally uses the senses.

7. Data- information gathered from observations.
There are 2 types of data:
1. Quantitative- expressed as numbers found by counting or measuring.
2. Qualitative- descriptive and involve characteristics that can’t be counted.

8. Scientists use data to make inferences – a logical interpretation of data or evidence collected.
Example: if you see
wet pavement, it
may have rained

9. Explaining and Interpreting Data
After making observations, researchers will propose one or more hypotheses.
A hypothesis is a proposed scientific explanation (or an educated guess) for a set of observations
Scientists generate hypotheses using prior knowledge, or what they already know; logical inference; and informed, creative imagination.

10. Explaining and Interpreting Data
In science, a hypothesis is useful only if it can be tested!
Research! The ability to reproduce results is an important part of any experiment!
Hypotheses can then be either ruled out or confirmed and supported.
Collaboration is key!

11. Analyzing data:
Study the graph on page 27 of the textbook and answer questions 1-5 (you do NOT have to write the Question).
TURN IT IN!

12. Scientific Theories
When enough experimental data support a hypothesis, the hypothesis becomes a theory.
A theory attempts to explain everything about a phenomenon including it’s cause.
A theory is a well-tested explanation that unifies a broad range of observations

13. Scientific Law
A statement that describes some aspect of a phenomenon that is TRUE
Does not explain how or why
Example: The law of gravity

14. Check Point 1.1: Write Questions and Answers!!
How does an observation about an object differ from an inference about that object?
An observation uses senses to gather information; an inference is a logical interpretation based on what you already know and have experienced.
What is Biology the study of?
The living world

15. Vocabulary: Write This Down on Chapter 1 Glossary Page!
Controlled experiment: testing a hypothesis by changing only one variable at a time while all other variables are unchanged, or controlled
Variables: Factors that can be changed in an experiment
Controlled variables: unchanged, remains the same
Independent (manipulated variable): Variable that is changed
Dependent (responding variable): the response to the independent variable

16. Scientific Method Foldable
Ask a question/State the Problem
Form a hypothesis
Must be testable. If…..then format
Test the hypothesis with a controlled experiments
Analyze data
Draw conclusions and Record results
MAKE FOLDBALE! Simpsons! Running in the Rain!

17. Vocabulary: Write This Down on Chapter 1 Glossary Page!
Metric System – a decimal system of measurements based on multiples of 10
Meter- basic unit of length
Liter- basic unit of volume
Gram – basic unit of mass
Kelvin or Celsius- basic units of temperature
Climbing the Stairs Graphic

18. Tools and Procedures: Measurements
Scientists use a universal system of measurement called Systeme International (SI) or the Metric System
Importance of a common system – allows scientists all over the world to communicate with each other and share data.

19. Common Prefixes: Write It Down!
Kilo
1 000 X (thousand)
Hecto
100 X (hundred)
Deca
10 X (ten)
Deci
0. 1 X (tenth)
Centi
0.01 X (hundredth
Milli
0.001 X (thousandth)

20. Sample Problems: Work these!
25.8 g = __________ kg
1000 g = _________ kg
45.9 cm = ________ m
100 m = __________ mm
75.2 mL = ________ L
10 dm = __________ m
27 L = ____________ kL

21. Sample Problems 25.8 g = .0258 kg 1000 g = 1 kg 45.9 cm = .459 m
100 m = mm
75.2 mL = L
10 dm = 1.0 m
27 L = .027 kL
Length Lab, Practice Problems

22. Line graphs When graphing the data from an experiment--
The graph should have a title
The graph should be drawn to scale
Independent variable (manipulated variable)- goes on the X axis
Dependent variable (resulting variable) –goes on the Y axis

23. Tools of the Trade: The Microscope
Allows scientists to see objects that would never be seen with the unaided eye

24. Three Types of Microscopes
Simple Microscope – Consists of only a single lens
Light Microscope – consists of two lens. One lens magnifies the object and the other magnifies image. (Good for observing small, living organisms)
Electron Microscope – electron beams are passed through the specimen and the image is projected onto a monitor. Better resolution and magnification. Two types – TEM and SEM

25. Lab Techniques
Cell cultures- single cell in a nutrient solution– then that cell produces many cells
Cell fractionation- cell is separated into different cell parts
Common Lab Equipment Worksheet
Starting with Safety Video

26. Studying Life- Branches of Biology ADD TO CH. 1 Glossary!!!
Botany – study of plants
Zoology – study of animals
Ecology – study of interactions between living things and their environment
Genetics – study of heredity
Microbiology – study of microorganisms
Evolution – study of living things changing over time
Biochemistry – study of organic molecules

27. 8 levels of organization in biology. You must know these
8 levels of organization in biology. You must know these! (Write it Down!)
1. Molecules- groups of atoms
2. Cells- smallest functional unit of a living organism
3. Groups of cells- tissues, organs
4. Organism- tree, dog, you
5. Population- Groups of organisms of one type in a defined area
6. Community- Different populations that live together in a defined area
7. Ecosystem- Community and its nonliving surroundings in a defined area
8. Biosphere- part of the Earth that contains all ecosystems, or all life

28. 8 Characteristics of Living Things. You must know! Write it down!
Made up of cells
Can reproduce
Have a genetic code
Grow and develop
Obtain and use materials and energy
Respond to the environment:Homeostasis
Maintain a stable internal environment
Changes over time

29. I. Living things are made up of cells
Cells – smallest unit of life
Unicellular organisms- consist of only a single cell
Multicellular organisms- contain more than one cell
The human body has over 85 different types of cells.

30. II. All living things reproduce
2 types of reproduction:
Sexual Reproduction- cells from two different parents unite to form the first cell of a new organism
Asexual Reproduction- new organism has a single parent (ex.- hydra)

31. III. Genetic Code IV. Grow and Develop
Directions for inheritance come from DNA
IV. Grow and Develop
Life cycles involve growth and development

32. V. Living Things Obtain and Use Materials and Energy
Metabolism: chemical reactions through which organisms break down materials
Photosynthesis: the way plants, most algae, and some bacteria obtain their energy- process of converting light energy into stored energy.
Decomposers: obtain materials from remains of dead organisms

33. VI. Respond to the environment
Organisms respond to stimuli from the environment – (ex: light, temperature, food)
VII. Maintain internal balance
Homeostasis-process by which organisms maintain a stable internal balance– to stay the same.
Ex. – body temperature

34. VIII. Change over time
Taken as a group, all living things change over time: Evolution