Question of the Day 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

DO NOW

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

a pH of 5.5?

DO NOW ANSWERED 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

Friday the 13th AGENDA

Big Questions: What tools are needed to conduct science?

1. Question of the day 2. DO NOW 3. 1-4 Tools/Procedures 4. Study Guides 5. HOMEWORK – STUDY GUIDES and

STUDY 6. CHAPTER 1 TEST Tuesday Sept

17

1-4 Tools and Procedures

The Metric System 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

ANALYZING DATA 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.

Microscopes 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 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