What is Science?Organized way of using evidence to learn about the natural world.
Goal of science? Investigate, Explain, and Understand nature Use explanations to make useful predictions
Observations – gathered by the use of 1 or more senses Produces evidence / data Ex. There are mini-skeletons hanging from the ceiling
Inference assumption based on something you already knew or have observed Ex: the clouds are gray and dark when it is raining
Data Quantitative – data that is measured using numbers There are 10 goats eating grass. Qualitative – characteristics not countable such as color, texture, smell His shirt is soft and green.
What are some roles of biologists?1. Study the diversity of life2. Research Diseases3. Develop Technology4. Improve Agriculture5. Preserve the Environment
Theory A theory is an explanation of observations that have been tested many times and the same result is given. Ex. Theory of evolution
Peer Review Before research is made public, information is reviewed by scientists’ peers.
Variables Variables – factors in experiment that change Control Group- group that doesn’t change Change only 1 variable in the exp. all others remain constant Independent variable – factor that is deliberately changed (manipulated variable) Plotted on X-Axis Dependent variable – factor that is observed and changes in response to the independent variable (responding variable) Plotted on Y-Axis
Scientific Method State the problem Hypothesis Experiment Collect & Analyze Date Conclusion
State the problem Observations Questions ―What’s the problem?’ Ex. My car won’t start! Why?
Form a hypothesis Is written If…then statement Must be testable Prediction Ex. If I fill my car up with gas, then it will start.
Experiment Tests the hypothesis Using independent & dependent variables Control variable Constants
Recording and Analyzing Results Use of charts, tables, graphs Look for patterns Qualitative & Quantitative
Draw a conclusion Was the hypothesis supported or refuted by the data? Summarize experiment Explain results
8 Characteristics Unicellularof LIFE1. Made up of Cells.*Cells are basic unit of life Unicellular: one cell Multicellular Multicellular: 2 or more cells
Asexual 2. Reproduce *Produce offspring Asexual reproduction: only 1 parentSexual Sexual reproduction: requires 2 parents