Chapter 1 Nature of Science

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

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

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

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.

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

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.