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Pure Substances, Mixtures and
Solutions
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Bellringer
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Today’s Agenda
1. Bellringer
2. Review : Elements & Compounds
3. Todays’ Objective & Journal Entries
4. Brain-Pop Video
5. Notes
6. Classify This
7. Venn Diagram
8. Exit Slip – Check for mastery
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Classes of Matter•Mixtures•Solutions•Elements- review
•Compounds - review
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Review- Elements
1. Element– composed of identical atoms and it is
in its purest form.
– EX: copper, aluminum, oxygen
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Review- Compounds
• 2. Compounds are made up of 2 or more different elements.
• (cells are classified as compounds too)
• Example: water, carbon dioxide, nitrogen oxide , cells
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Today’s Objective
Benchmark:SC.8.P.8.9
Students will: Analyze the properties of substances to
determine if they are mixtures or pure
substances.
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Journal Entries Unit 2 – Lesson 4
Date Entry Page Number
Unit 2-Day 4 - Pure Substances, Mixtures,
and Solutions
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Brian Pop
• Compounds and Mixtures
• http://www.brainpop.com/science/matterandchemistry/compoundsandmixtures/
Brain teaser question: What is the difference between a compound and a
mixture?
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Classes of Matter•Mixtures•Solutions•Elements•Compounds
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Vocabulary1.Mixture2.Heterogeneous3.Homogeneous4. Solution5. Solvent6. Solute
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Mixtures3. Matter that consists of ________________________________________________
two or more substances mixed together but not chemically combined.
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Mixtures•4. Can be separated by _______ ______.
•Ex: Cereal, Sand, Ex: Cereal, Sand, Soil, Concrete, Soil, Concrete, Salad DressingSalad Dressing
physical means
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Properties of Mixtures
•5. Substances in a mixture keep most of their own properties.– ___________
Sugar-Sugar-waterwater
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•6. In a mixture: Substances do not change in chemical composition (no new substance is formed)
Classify these examples as a compound or a mixture:1. Air in the atmosphere:
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Classify these examples as a compound or a mixture:
• 2. Water
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Classify these examples as a compound or a mixture:
• 3. Glass
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Heterogeneous Mixture
•7. A mixture that ____________________________________does not appear to be the same throughout.•Sand and WaterSand and Water
•CerealCereal•Oil and WaterOil and Water
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Homogeneous Mixture
•8. A mixture that appears to be the same throughout.
•Remains constantly and uniformly mixed.•Salt WaterSalt Water
•Sugar Sugar Water (Kool-Water (Kool-
Aid)Aid)
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Solutions•“9. _________” of all
mixtures•Not easily separated by physical means
•Koolaid,Koolaid,Lemonade, Salt WaterLemonade, Salt Water
best mixed
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Solutions10. Solute
–the
substancethat is
dissolved
11. Solvent – the
substance that does
the dissolving
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If I mix sugar into water..
• What is the Solute?
• What is the Solvent?
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Pure Substance12. A pure substance is a chemically combined material
that has consistent properties throughout the sample.
Examples (Elements & Compounds): tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate).
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Elements Compounds Heterogeneous Homogenous
Left Side : Classify This In your journal you will create a T chart to classify each
object as either an element, compound, or mixture
Pure Substances Mixtures
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1. Oxygen 3. Koolaid2. Nitrogen Dioxide
4. Salt Water 5. Blood Cells6. Lemonade
7. N28. Cereal
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Elements Compounds Heterogeneous Homogenous
Pure Substances Mixtures
1. Oxygen
7. N2
2. Nitrogen Dioxide
5. Blood Cells
3. Koolaid
4. Salt Water
6. Lemonade
8. Cereal
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Left Side : Venn Diagram and Exit Slip Answers
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Right Side : Exit Slip Questions
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Left Side : Exit Slip Answers
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Left Side Extension:
• List five examples of mixtures you observed today.
• List five examples of pure substances you observed today.
• List five examples of solutions you observed today.