1. Chapter 1
Nature of Science

2. Nature of Science
Science- a system of knowledge based on facts or principles
What does a Scientist do?
*investigate
*plan experiments
*observe
*test results

3. Science has many branches: (pg.6)
Biological Sciences- science of living things
Biology, Botany, Zoology, Ecology, and others.
Physical Science- science of matter and energy
Physics and Chemistry
Earth Science- science of the earth
Geology, Meteorology, an many other branches

4. Science and Technology Work Together
Technology-is the application of science to meet human needs.
Scientific theory-a tested possible explanation of a natural event.
Ex. The theory that heat is the energy of particles in motion.
Theories are always being questioned and tested.
Scientific Law- a summary of an observed natural event
Ex. Warm objects always become cooler when placed in cooler surroundings
Notice: The law does not explain why warm objects become cooler theories and laws are not always absolute

5. Mathematics can Describe Physical Events
Scientist speak different languages around the world but the language of math is universal .
Ex. Rectangle Area Equation A= l·w
Models also help scientist represent physical events.

6. The Way Science Works
Critical thinking- applying logic and reason to observations and conclusions.
Scientific method- a series of logical steps to follow in order to solve problems.
Observe→ Form Question→Collect data→Form hypothesis→Test→ Multiple observations→Draw conclusions

7. The Way Science Works Scientist test hypothesis by doing experiments.
Variable- anything that can change in an experiment
The best experiments change only one variable at a time.
Ex. Squeaky doors
Scientific tools- microscope, telescope, computers, measuring devices.