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Composition of Matter

Composition of Matter

Date_1/7/2011________
_____ Day of School Lesson Plan
Mrs. Nancy Reeves-Velasquez
Unit Name: Nature of Matter Lesson Title: Composition of Matter
Lesson Plan # _3___
Standard: SPI: CLE 3202.1.1, CLE 3202.1.5, CLE 3202.1.7
Materials Needed: Journal notebook, Pencil, paper, textbook
Objective:
1. Define substances and Mixtures
2. Identify elements and compound
3. Compare and contrast solutions, colloids, and suspensions
Vocabulary:
1. Substance (single material)-a type of matter with a fixed composition
2. Element-all the atoms in a substance that have the same identity.
3. Compound-a substance in which the atoms of two or more elements are combined in a fixed proportion
4. Heterogeneous mixture-A mixture in which different materials can be distinguished easily.
5. Homogeneous mixture-contains two or more gaseous, liquid, or solid substances blended evenly throughout.
6. Solution-a homogeneous mixture of particles so small that they can not be seen with a microscope and will never settle to the bottom of their container.
7. Colloid-a type of mixture with particles that are larger than those in solutions but not heavy enough to settle out.
8. Tyndall effect-The particles in the colloid are large enough to scatter light, but those in the solution are not. This scattering of light by colloidal particles is called the Tyndall effect.
9. Suspension-a heterogeneous mixture containing a liquid in which visible particles settle.
Class
1. Hand Shake, Welcome to Class…………………………..……………………….…………...2 minutes
a. Stand at the door and shake hands with each student as they enter the room. Inform the student to find their assigned seat and begin the assignment that is on the board.
b. BELLRINGER-………………………………………………………….…………………. 5 minutes
i. How many kinds of matter are there in the universe: 1, 10, 100, 1000, 10,000, or more than 10,000?
ii. What makes up matter?
c. While the students are doing their Bell ringers take roll.
2. Instruction: ……………………………………………………………………………………………..35 minutes
a. Begin class with Launch Lab-to demonstrate for students how water can be distilled and purified.
b. Show a picture of the world trade center.
i. Is this picture a real painting? Do you have to touch it to find out? Why?
ii. The properties of materials can be used to classify them into general categories. All materials are made up of either pure substances or mixtures.
iii. PURE SUBSTANCES
1. A pure substance (substance) is a type of matter with a fixed composition.
2. Can you give me an example of a substance: helium, aluminum water, salt.
3. All substances are built from atoms
4. If all the atoms in the substance have the same identity, that substance is an element.
5. Can you give me an example of an element? Copper, zinc.
6. About 90 elements are found on earth and 20 can be made in Laboratories but most of these are unstable and only last for a short time.
7. Show Section 1 (L2)
8. Show class a beaker of water (H2O) and a beaker of Hydrogen peroxide (H2O2)
a. Both liquids contain only oxygen and hydrogen and only hydrogen and oxygen, both liquids are transparent and colorless. How can the two liquids have different identities? (H2O, H2O2)
9. Introduce Compounds-Two or more elements can combine to form substances called compounds. Compounds have fixed proportions.
a. Ex: Water- 2 atoms of H mix with 1 atom of O.
How are elements and compounds related? Compounds contain two or more different elements. Cl2, H2, S8- are not compounds, remember compounds are made from combination of different elements.
*have some bleach on the table and sodium on the table. Has anyone put either of these on their food today? If you have put salt on your food today than you have…how? Is is a fixed proportion of NaCl that creates salt, and like salt most compounds look different than their elements in them.


Mixtures
Ask the class if they would like a mixture. A mixture is made up of two or more substances that can be easily separated by physical means.
1. heterogeneous mixtures-a mixture in which different materials can be distinguished easily.
a. Ask the class to give me some examples of heterogeneous mixtures) i.e. pizza, concrete. Clothing (not 100% cotton)-use the microscope to show the students the different type of fabric. Polyester fabric is smooth and cotton is rough.
b. Are heterogeneous mixtures always easy to detect as in pizza? Why?
c. If time allows do the mini lab.
2. homogeneous mixtures- contains two or more gaseous, liquid, or solid substances blended evenly throughout.
a. Ask the students to give examples of homogeneous mixtures? i.e. vinegar, soda. (soda where you can see the CO2 bubbles and ice are heterogeneous.)
b. Another name for homogeneous mixtures is solution.-components will not settle themselves after setting.
3. colloids-a type of mixture with particles that are larger than those in solutions but not heavy enough to settle out.
a. Colloids-comes from Greek word glue
b. detecting colloids-You can tell for certain if a liquid is a colloid by passing a beam of light through it. A light beam is invisible as it passes through a solution, but can be seen readily as it passes through a colloid.
i. Show some examples of this with gel etc.
c. ask students to give an example of a colloid. i.e.-milk, it contains water, fats, and proteins in varying proportions. Fog-water particles floating in air, smoke.
4. Suspensions- these are neither solutions nor colloids, these are heterogeneous mixtures containing a liquid in which visible particles settle.
a. Show an example of pond water.

Closure:
3. Close out class, get book bags ready……………….…………………………………….…2 minutes
a. While the students are getting their things ready to go remind the students of the Suggestion, Comments, and concerns mailbox
Assignment: Study Flashcards/ Flip Chart Elements, Compounds, Mixtures
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