1. Scientific Exploration

2.  Science-the human effort to understand the national world  Nature of Science- the values and beliefs behind science and scientific exploration  Scientist- people who propose explanations for questions about the natural world

3.  Cooperate- two people working together and someone is in charge  Collaborate- two people working together but both are equal  Consensus- an agreed upon decision

4.  Hypothesis- educated guess  Engineer- A person who uses scientific knowledge to design useful things  Black box- a system that can not be directly observed or easily understood  Model- a representation that explains how something is built or how it works  System- parts that work together or share the same space in a meaningful way

5.  Conceptual Model- ideas that suggest what a system is or how it works.  Ideas that exist in a person’s mind or on paper  Physical Model- May be a scaled model, either larger or smaller than the actual system it represents.  It is a model you can touch

6.  Why do we create models? Scientists make models to help them understand how systems work.  Why do models change over time?  When scientists discover new evidence they may decide to change their model.