CHAPTER 1 The Science of Life

GOAL of science:

Investigate Understand Explain events Make predictions (pg.3)

Science is: *an organized way of using evidence to learn about the natural world

*the body of knowledge that scientists have built up after years of using this process

Scientific Thinking

Observations- use the five senses 2. Data – gathered from observations Inference – a logical interpretation 4. Hypothesis - proposed explanation of

How Scientists Work *Ask a question *Form a hypothesis *Controlled experiment *Analysis *Draw a conclusion *Theory

Explain!! pg. 8-9

Lazzaro Spallanzani

Give two examples of times when an experiment is not possible. Why? What other methods could be employed?

What is a “theory”? Explain the theory or theories about why marsupials are primarily in Australia.

Characteristics of Living Things

Living things are made up of cells.

Living things reproduce.

Living things are based on a universal genetic code.

Living things grow and develop.

Living things obtain and use materials for energy.

Living things respond to their environment

Living things maintain a stable internal environment. (homeostasis)

Taken as a group, living things change over time.

LEVELS OF ORGANIZATION from smallest to largest

1. MOLECULES

2. CELLS

3. GROUPS OF CELLS (TISSUE, ORGAN, ORGAN SYSTEM)

4. ORGANISM

5. POPULATION

6. COMMUNITY

7. ECOSYSTEM

8. BIOSPHERE

TOOLS AND PROCEDURES THAT SCIENTISTS USE

Metric System Graphs Microscopes

Types of Microscopes 1. Light microscope

2. Electron Microscope

Laboratory Techniques Cell Culture Cell Fractionation

ALWAYS REMEMBER LAB SAFETY