Chapter 2: The Material World

Chapter 2 Goals Make a Title Page for Chapter 2. Write the Chapter Goals on the Title Page What are characteristic properties of matter and how are they used to identify matter? What is the underlying structure of matter, and how do the properties we observe relate to this underlying structure? Update your Table of Contents

Engage: toying with matter Create a new header/thread “Toying with Matter” Write the Learning Target: I can assess my current understanding of density by predicting how objects will interact. Update your TOC

Engage: Toying with Matter Answer these questions in your notebook! Read Introduction p. 58 Wave Toy demonstration What properties of matter are important to how a wave toy functions? How do those properties differ among the materials used in the toy? What do you already know about density, solubility, and reactivity? What else do you need to learn to understand how the wave toy functions?

Engage: Toying With Matter Answer these questions in your notebook! Process & Procedure 1. Study the liquids on the demo table. A. Are they made of the same matter? What macroscopic observations lead you to your answer? What does macroscopic mean? B. How could you determine if these materials would be right for a wave toy of your own design?

Engage: Toying with Matter Read your answers to your partner. Discuss similarities and differences in your answers. Update your notebook with any useful information your partner shared with you.

Engage: Toying with Matter Demo: Candles and Flasks - Before Sketch what you see. Label all important parts. Predict what you think will happen to each candle in sketches. Under each sketch answer why you think it will happen. Discuss with your partner and update your notebook with any new information.

Engage: Toying with Matter Demo: Candles and Flasks - After Sketch what you see. Label all important parts. How do your predictions compare with what you see? Label each sketch with “What I see” (evidence) and “What it means” (inference)

Engage: Toying with Matter Some helpful definitions: Mixture: a blend of two or more types of matter, each of which retains its own identity. A mixture can be separated by physical means. Homogeneous: uniform properties throughout. Examples of homogeneous mixtures are air, gasoline, salt dissolved in water Heterogeneous: properties differ in different parts of the mixture Examples of heterogeneous mixtures are concrete, chicken soup, soil, salt and pepper mixed together

Engage: Toying with Matter Reflect & Connect p. 61 #1-4 Make sure these are done for tomorrow – we will be discussing them!