Introduction to Biology Figure 1.1 Introduction to Biology Figure 1.1 What can this beach mouse (Peromyscus polionotus) teach us about biology?

Biology is the study of LIFE!

Big Ideas in AP Biology Big Idea 1: The process of evolution drives the diversity and unity of life.

Big Ideas in AP Biology Big Idea 2: Biological systems utilize free energy and molecular building blocks to grow, to reproduce and to maintain dynamic homeostasis.

Big Ideas in AP Biology Big Idea 3: Living systems store, retrieve, transmit and respond to information essential to life processes.

Big Ideas in AP Biology Big Idea 4: Biological systems interact, and these systems and their interactions possess complex properties.

What is Science?

Inquiry is at the heart of science. What is Science? Science = Latin “to know” Inquiry is at the heart of science. Inquiry: search for information and explanation Two main processes: Discovery science Hypothesis-based science

Discovery Science Describes nature through observation and analysis of data Data = recorded observations Qualitative and quantitative Inductive reasoning: derive generalizations based on specific observations

Hypothesis-Based Science Hypothesis: makes predictions that can be tested by recording more observations or experiments AP Biology: “If … , then … because…” Results can either support or refute the hypothesis Not “My hypothesis is correct”

Science Practices Use representations and models to communicate and solve problems Use mathematics appropriately Pose scientific questions to extend thinking or guide investigations Plan and implement data collection Analyze data and evaluate evidence Work with scientific explanations and theories Connect and relate knowledge across scales and domains

YouTube Video: My Dad’s an Alien What is her claim, evidence and reasoning?

How are experiments related to scientific explanations?

Experiments / Investigations Hypothesis (If…, then...because...) Use control and experimental groups Experimental Design: Independent variable (IV) Dependent variable (DV) Control Constants # Trials Record observations and data

Experiments / Investigations Develop explanation for phenomena based on scientific evidence (data) Claim: statement about results of investigation (can support or refute hypothesis) Evidence: scientific data from the lab investigation, previous experiments, published literature, models, etc. Reasoning: ties together claim and evidence; includes scientific principles

Model of the Scientific Process

Theories in Science Broader in scope than a hypothesis Generates new hypotheses Supported by a large body of evidence Can be modified or rejected with new research evidence Examples: Theory of evolution by natural selection Theory of gravity Theory of plate techtonics

CER Practice Tracking Global Changes in Forest Cover Practice