Presentation on theme: "The student is expected to: 2A know the definition of science and understand that it has limitations...; 2B know that hypotheses are tentative and testable."— Presentation transcript:
1 The student is expected to: 2A know the definition of science and understand that it has limitations...; 2B know that hypotheses are tentative and testable statements that must be capable of being supported or not supported by observational evidence...;
2 (continued) 2C know scientific theories are based on natural and physical phenomena and are capable of being tested by multiple independent researchers. Unlike hypotheses, scientific theories are well-established and highly-reliable explanations, but they may be subject to change as new areas of science and new technologies are developed;
3 (continued) 2D distinguish between scientific hypotheses and scientific theories; 3A in all fields of science, analyze, evaluate, and critique scientific explanations by using empirical evidence, logical reasoning, and experimental and observational testing...; 3B communicate and apply scientific information extracted from various sources...
4 KEY CONCEPT Science is a way of thinking, questioning, and gathering evidence.
5 Like all science, biology is a process of inquiry. Scientists make careful and systematic observations.Scientists record observations as data.Scientists form a hypothesis as a possible answer to a question.Scientists test their hypotheses and analyze their data.
6 Biologists use experiments to test hypotheses. Observational studies allow scientists to describe a phenomenon.
7 Experimental studies allow scientists to determine what causes a phenomenon.
8 Independent variables are manipulated. Experimental studies allow scientists to determine what causes a phenomenon.Independent variables are manipulated.Dependent variables are observed and measured.Show visual concept for independent and dependent variables.Constants are conditions that are kept the same.
9 A theory explains a wide range of observations. Theories explain a wide range of observations and experimental results.A theory is supported by a wide range of scientific evidence.Theories can change based on new evidence.
10 Scientists communicate information in many different ways. Scientific research is reviewed by other scientists.Scientific journals are primary sources of scientific information.Most scientific knowledge relevant to the public comes from secondary resources.Reliable sources of scientific information are based on empirical evidence, logical reasoning, and testing.