1. The Science of Biology
Chapter 1

2. Science is an organized way of gathering and analyzing evidence about the natural world.
1.1: What is Science?

3. Always changing
Based on evidence and facts, not beliefs
Only deals with the natural world
Always tested

4. provide natural explanations for events in the natural world
Investigate and understand the natural world
use those explanations to make logical interpretations
The Goals of Science

5. Organized method to investigate and answer questions in an orderly way
Scientific Method

6. Observing & Asking Questions
Scientific investigations begin with observations, the act of noticing and describing events or processes in a careful, orderly way.
Sometimes observations can lead to questions that no one has asked before.
Observing & Asking Questions

7. Inferring & Forming a Hypothesis
After posing questions, scientists use further observations to make inferences, or logical interpretations based on what is already known.
Inference can lead to a hypothesis, or a testable explanation for a set of observations
Possible answer to a scientific question
Inferring & Forming a Hypothesis

8. Experiments Scientific hypotheses are tested
Scientists design experiments to test hypotheses by changing certain factors called variables
Experiments

9. Collecting & Analyzing Data
Scientists make detailed records of experimental observations, gathering information called data.
There are 2 main types of data- quantitative and qualitative.
Collecting & Analyzing Data

10. Quantitative data are numbers obtained by counting or measuring, and can include the number of individuals, length, width, and weight.

11. Qualitative data are descriptive and involve characteristics that cannot usually be counted, and can include texture, type, and other notes.

12. Scientists use data from experiments as evidence to support, refute, or revise the hypothesis being tested, and to draw a valid conclusion.
They will share their conclusion with others using publications called journals
Drawing Conclusions

13. Designing Experiments
Scientists use experiments to test hypotheses
Change different variables and observe
2 types of variables
Designing Experiments

14. independent- deliberately changed or manipulated
Only one will be tested in each experiment
dependent- observed and changes in response to independent variable