2-3 Classifying Matter
- 1. Warm-up What instrument would you use to measure temperature? Which of the following is a unit of volume? a. gram b. atmosphere c. meter d. liter What property of matter can you measure using a graduated cylinder? Thermometer Volume
- 2. 2-3 Classifying Matter Classify pure substances as elements and compounds. Describe the characteristics of an element and the symbols used to identify elements. Distinguish pure substances from mixtures. Classify mixtures as heterogeneous or homogeneous. Classify mixtures as solutions, suspensions, or colloids.
- 3. Matter? What is matter? Anything that has mass and takes up space Why do we need to classify matter? Not all matter is the same. Different types of matter must be treated differently.
- 4. Group the following into 2 or more groups Sand Concrete Iron Orange juice Paint Air paper Basketball Car Monocacy River water Vitamin water Computer Cell phone gold
- 5. Pure Substances Made up of all the same thing or one type of matter. Pure substances have the same properties regardless of sample. Subgroups Elements compounds.
- 6. Elements Substances that cannot be broken down into simpler substances. Think of atoms. Contain only one type of atom. It has a fixed composition. Examples of elements: Aluminum (Al), Gold (Au), Carbon (C) - solids Bromine (Br 2 ), Mercury (Hg) - liquids Oxygen (O 2 ), Nitrogen (N 2 ) - gases
- 7. Compounds Substances that are made up of two or more simpler substances. The simpler substances can be either elements or other compounds. They are combined in chemically defined ratios. H 2 O – Water C 6 H 12 O 6 – Glucose (Sugar)
- 8. The make-up of mixtures are not fixed. Properties vary by mixture contents. They retain some of the properties of the individual substances. Sand Dirt Mac & cheese Mixtures
- 9. Which of the following are pure substances? Sand Copper wire Your Phone Your notebook
- 10. Which of the following is a mixture? Pure water 24 karat gold ring Iron rod River water
- 11. Which of the following is not an element? Gold Sugar Iron Zinc
- 12. Which of the following is a compound? H 2 O Au Cu Fe
- 13. Heterogeneous Mixtures The Greek words hetero and genus meaning “different” and “kind.” Two or more types of atoms, physically combined in no definite ratio. Different throughout.
- 14. Homogeneous Mixtures Two or more substances, physically combined in no definite ratio. Same throughout.
- 15. Matter Classification Matter Pure Substances Mixtures Elements Compounds Homogeneous Heterogeneous
Editor's Notes
- #6: All water is the same. Pure water smells, tastes, and looks the same. Every pinch of salt tastes equally salty. Every block of gold shines equally.
- #7: Can atoms be broken down into smaller parts and the matter still have the same characteristics?
- #8: The elements have different properties when alone. Hydrogen and Oxygen are flammable as elements. But water is not flammable.