1. Table of Contents Scientific Investigation Scientists and Society How Science Changes Models as Tools in Science The World of Science

2. Scientific Investigation Sprouted Seeds Scientists often use graphs to analyze the evidence collected during an experiment. This graph shows how many radish seeds sprouted over time at two different temperatures.

3. Galileo Galilei What is the order of events that led to Galileo’s house arrest? Scientists and Society

4. How Science Changes Scientific Knowledge Einstein’s work contributed to scientific knowledge about the sun and other stars.

5. Models as Tools in Science Two Science Models Models may be three-dimensional objects or equations. Explain how each of these models represents an object or a process and why each is useful.

6. Models as Tools in Science An Everyday System In a flashlight, many parts work together as a system. Share what you know to explain why a flashlight is a good example of a system.

7. Models as Tools in Science A Basic Model In this model of a food chain in the Florida Everglades, the algae make food using the sun’s energy. Algae are tiny living things that make their own food.

8. Models as Tools in Science A Model of a Simple System This model of an Everglades food web contains overlapping food chains.

9. Models as Tools in Science How Arctic Sea Ice Melts The Arctic sea-ice system can be modeled by a diagram. What is the input, process, and output in this model?

10. Models as Tools in Science A Model of the Scientific Community The work of scientists can be modeled in a diagram. In which part of the diagram would you put each term?

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