Describing Matter

1. Chapter 1 Describing Matter

2. What is Matter? • Anything that has mass or takes up space • Examples? • Non-examples?

3. What is Chemistry? • Study of properties of matter and how matter changes

4. Substance or Not • Some types of matter are substances and others are not • Substances always have the same specific makeup and therefore properties. • Examples: Salt, Gold, Water • Non-examples: Cookies, Gravel, Computer

5. Properties of Matter • 2 types: Physical and Chemical

6. Physical Properties • Characteristics of a pure substance that can be observed without changing the substance into an new substance.

7. Examples of Physical Properties • Freezing point • Hardness • Texture • Color • Physical state (Pg 8 Activity) • Conduct heat • Magnetic

8. Chemical properties • Characteristic of a pure substance that describes its ability to turn into different substances.

9. Examples of Chemical Properties • Burning • Rusting • Producing gasses • Reactivity with water

10. Activity • List some characteristics of your item • Do you know what your item is? • Is it a pure substance • Label the characteristic as Physical or Chemical

11. Elements • A pure substance that can not be broken down into any other substance by physical or chemical means Earth, Wind, Fire, Water

12. Elements • Elements are the simplest substances • Look on page 182-183 on the text • List what elements you have heard off • List three that you have never heard off

13. Assignment • Due Tuesday • Bring in a sample of an element

14. Particles of Elements • Atom: basic partial of which all elements are made • Different elements have different properties because their atoms are different

15. When Atoms Combine • Chemical bond: A force of alteration between 2 atoms • Molecules: Groups of 2 or more atoms held together by chemical bonds • Water (H2O) • Oxygen (O2) • Carbon Dioxide (CO2)

16. Remember • All Matter is made up of Elements • All Elements are Made up of Atoms • However, most elements are combined with other elements to make up substances

17. Activity • How many packaging peanuts can I fit into my mug?

18. Compounds • Pure substance made of 2 or more elements chemically combined in a set ratio • Water (H2O) • Carbon Dioxide (CO2) • Carbon Monoxide (CO) • Combining elements changes their properties

19. Mixtures • Mixture: Made up of 2 or more substances that are together but not chemically bonded (no Ratio) • Salad • Soil • Each substance keeps its individual properties

20. Types of Mixtures • Heterogeneous: you can see the different parts • Soil, Salad, Pencil Case, Book Bag • Homogeneous: you can’t see the different parts • Brass, Kool-Aid, Air

21. Solution • A homogeneous mixture

22. Compounds vs Mixtures • Compounds are difficult to separate • Mixtures are easy to separate • Evaporation, Magnetism, Filtration

23. Group Quiz • Everything off your desk • Sit on your desk • After you answer a question sit in your chair • Be quit • One question per student (2 points each) • Total grade is for everyone in the class • Every time a rule is broken (-1) points

24. What is Matter, give an example and non-example.

25. What is a substance, give an example and a non-example

26. What is a physical property?

27. What is a chemical property?

28. Give 2 examples of a physical property and 2 examples of a chemical property

29. What is a pure substance that can not be broken down into any other substance by physical or chemical means called?

30. Give 10 different examples of elements

31. Different elements have different properties because there _________ are different.

32. What is a molecule and give 3 examples

33. What is a chemical bond?

34. What is a compound?

35. What is the difference between a mixture and a compound?

36. What are the 2 types of mixtures and give an example of each

37. What is a solution, give an example

38. What is your homework due on Tuesday?