1. Alchemy Unit Investigation I: Defining Matter Lesson 1: Penny for Your Thoughts Lesson 2: Whatsa Matter? Lesson 3: Tools of the Trade Lesson 4: All That Glitters

2. Alchemy Unit – Investigation I Lesson 1: Penny for Your Thoughts

3. © 2004 Key Curriculum Press. Unit 1 Investigation I ChemCatalyst : Copy in your journal Long ago, early scientists tried to turn ordinary things into gold. This pursuit was called alchemy and the people who engaged in alchemy were called alchemists. Do you think the alchemists were successful in turning things to gold? Explain your thinking.

4. Alchemy Unit – Investigation I Lesson 2: Whatsa Matter?

5. © 2004 Key Curriculum Press. Unit 1 Investigation I ChemCatalyst Modern chemistry is defined as the study of matter. What do you think matter is? Name two things that are matter and two things that are not matter.

6. © 2004 Key Curriculum Press. Unit 1 Investigation I Here are some textbook definitions of matter: Matter is anything that has mass and volume. Matter is anything of substance in the known universe. Matter is anything that takes up space. Notes (cont.)

7. © 2004 Key Curriculum Press. Unit 1 Investigation I Mass & Volume Mass is the amount of matter in an object substance. We measure mass by measuring it on a scale or balance. Volume refers to the amount of space occupied by a substance.

8. © 2004 Key Curriculum Press. Unit 1 Investigation I Properties of Matter The intrinsic property of a substance is a property that doesn’t depend on size and shape. It is generally not easy to determine intrinsic properties from the appearance of a substance. Ex. Reactivity, flammability, density

9. © 2004 Key Curriculum Press. Unit 1 Investigation I Properties of Matter Extrinsic Properties of matter are properties that can be observed qualitatively. Ex. Color, size, shape, texture

10. © 2004 Key Curriculum Press. Unit 1 Investigation I Density Density is defined as the mass per unit volume or how much “stuff” there is in a certain space. Density is an intrinsic property of matter. D = m  v D= density (g/ml or g/cm 3 ) M= mass (g) V= volume (ml or cm 3 )

11. © 2004 Key Curriculum Press. Unit 1 Investigation I Check-Out Which of the following can be classified as matter according to our definition? a) a beam of sunlight b) an autmobile c) an idea d) your breath e) rain f) sadness

12. © 2004 Key Curriculum Press. Unit 1 Investigation I Wrap-Up Matter is everything that takes up space. Matter exists in many forms.

13. Alchemy Unit – Investigation I Lesson 4: All That Glitters

14. © 2004 Key Curriculum Press. Unit 1 Investigation I ChemCatalyst In the year 1 B.C., King Hiero commissioned the creation of a golden crown. However, he didn’t believe that the goldsmith used all gold. He asked Archimedes to determine if the crown was solid gold. (cont.)

15. © 2004 Key Curriculum Press. Unit 1 Investigation I Do you think Archimedes can determine if the crown is solid gold by putting it under water? Why or why not? What happens to the level of the water if you submerge a crown in the water? (cont.)

16. © 2004 Key Curriculum Press. Unit 1 Investigation I The Big Question How can we use mass and volume to prove whether or not a substance is gold?

17. © 2004 Key Curriculum Press. Unit 1 Investigation I You will be able to: Find the mass, volume, and density of solid objects.

18. © 2004 Key Curriculum Press. Unit 1 Investigation I Activity Purpose: It is not always easy to tell one form of matter from another. This activity will show you how to differentiate between different forms of matter by examining density, one of the physical properties of matter. density = mass ÷ volume (cont.)

19. © 2004 Key Curriculum Press. Unit 1 Investigation I Data and Calculations Metal Mass (g) Volume of water (mL) Volume of water with metal (mL) Volume of metal (mL) 2-inch long gold-colored rod 2-inch long silver-colored rod 4-inch long silver-colored rod (cont.)

20. © 2004 Key Curriculum Press. Unit 1 Investigation I Densities of metals copperzincgoldaluminumbrass 9.0 g/mL7.1 g/mL19.3 g/mL (cont.)

21. © 2004 Key Curriculum Press. Unit 1 Investigation I Check-In In 1999 the United States Mint produced a coin called the Golden Dollar. It features an image of Sacagawea, the famous Native American guide for Lewis and Clark. It has a mass of 9.8 g and a volume of 1.1 mL. What is the density of this coin? The density of gold is 19.3 g/mL. Is this coin truly gold? Explain.

22. © 2004 Key Curriculum Press. Unit 1 Investigation I Wrap-Up Density is an intrinsic physical property of matter. It is a measure of the mass per unit of volume of a substance. One substance can be distinguished from another by examining its intrinsic physical properties.