NAS 2 TCC Study Guide Questions and Answers

NAS 2 TCC Study Guide Questions and Answers What is the purpose of the scientific method? - Answer-The scientific method is an organized way to study the natural world and find out how it works. What are the steps of the scientific method? - Answer-Ask a Question. Do Background Research. Construct a Hypothesis. Test Your Hypothesis by Doing an Experiment. Analyze Your Data and Draw a Conclusion. Communicate Your Results. Distinguish between independent and dependent variables - Answer-An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable is the variable being tested and measured in a scientific experiment. Distinguish between control and experimental groups - Answer-An experimental group is the group in an experiment that receives the variable being tested. One variable is tested at a time. The experimental group is compared to a control group, which does not receive the test variable. Distinguish between hypothesis and theory. - Answer-A hypothesis is an attempt to explain phenomena. It is a proposal, a guess used to understand and/or predict something. A theory is the result of testing a hypothesis and developing an explanation that is assumed to be true about something. Define Anatomy and Physiology - Answer-Anatomy is the study of the structure and relationship between body parts. Physiology is the study of the function of body parts and the body as a whole. Identify the six levels of organization (chemical, tissue, etc.) - Answer-1) Chemical Level 2) Cellular level 3)Tissue level 4)Organ level 5)Organ system level 6) Organismal level Identify the requirements for life: - Answer-1. Reproduction 2. Response/reaction to environment 3. Metabolism 4. Growth. Identify survival needs: - Answer-survival needs (5): nutrients, oxygen, water, stable body temperature, and atmospheric pressure What is homeostasis? - Answer-The tendency of an organism or a cell to regulate its internal conditions, usually by a system of feedback controls, so as to stabilize health and functioning, regardless of the outside changing conditions.