 The term physiology means  A. the study of physics  B. the study of the function of living things  C. the study of plant reproduction  D. the study of the physical properties of elements

1.What does this graph represent? 2.Which enzyme has a higher activity at a pH of 5.5?

 1. The graph represents the relative activity of pepsin and trypsin at various levels of pH.  2. Trypsin has a higher relative activity at a pH of 5.5

 Big Questions: What tools are needed to conduct science?  1. Question of the day  2. DO NOW  Tools/Procedures  4. Study Guides  5. HOMEWORK – STUDY GUIDES and STUDY  6. CHAPTER 1 TEST Tuesday Sept 17

 Used by most scientists when collecting data and performing experiments.  Decimal system using multiples of 10

Common Metric Units length – the meter – roughly equals 39.4 inches volume: the amount of space an object occupies – cubic centimeter for solids – liter for liquids

More Common Metric Units mass: measure of the amount of matter in and object weight: measure of the pull of gravity on that mass – the kilogram – approximately 2.2 pounds temperature – uses the Celsius scale – water freezes at 0°C and boils at 100°C

The Metric System the universal system of measurement Called SI or System International

 As scientists, you will often be asked to record data, analyze it, and interpret your results.  Being able to plot data, graph it, and make comparisons is an important skill.

 Compound light microscope: Uses light to study dead organisms and some very small living ones.  Electron microscope: Uses beams of electrons to study samples.  Done inside a vacuum so living things cannot be studied.

 Chapter 1 TEST on Tuesday Sept 17  BE PREPARED to take the test on the day you return to school if you are absent.  Study Guides DUE on Tuesday Sept 17