By Liz LaRosa 5 th Grade Science www.middleschoolscience.comwww.middleschoolscience.com 2009 Classifying Matter: Elements, Compounds, and Mixtures.

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Presentation transcript:

By Liz LaRosa 5 th Grade Science Classifying Matter: Elements, Compounds, and Mixtures

Elements pure substance that cannot be separated into simpler substance by physical or chemical means.

Elements-examples: Hydrogen – H2 Oxygen – O2 Sodium – Na Chloride -- Cl

Compounds--Pure substance composed of two or more different elements joined by chemical bonds

Compounds-Examples: Water H20 Hydrogen peroxide H202 Sodium chloride NaCl Carbon dioxide CO2

Mixtures -- A combination of two or more pure substances that are not chemically combined. Chem4kids.com

Mixtures—examples: Air Rocks Sand Koolaid Salad Pizza

BrainPOP movie Compounds and mixtures

. Compounds Have chemical formulas H2O Have physical and chemical properties different than the elements they are made from -H20 is a liquid but hydrogen and oxygen are gases Are chemical changes and can only be separated by chemical means, not physically Always have the same amounts of elements in it each time -water is H2O and it will always have 2 hydrogen atoms and 1 oxygen atom joined together

Mixtures Substances are held together by physical forces, NOT chemical Are physical changes Can be separated physically Each substance keeps its physical properties in the mixture Can have different amounts of a substance in it Chem4kids.com

Can you identify the following? You will be shown a series of photos. Tell if each photo represents an item composed of an element, compound, or mixture. Review: An element contains just one type of atom. A compound contains two or more different atoms joined together. A mixture contains two or more different substances that are only physically joined together, not chemically. A mixture can contain both elements and compounds.

Element, Compound, or Mixture? Rocks

Element, Compound, or Mixture? Rocks

Element, Compound, or Mixture? Copper

Element, Compound, or Mixture? Copper

Element, Compound, or Mixture? Jelly Beans

Element, Compound, or Mixture? Jelly Beans

Element, Compound, or Mixture? Table Sugar

Element, Compound, or Mixture? Table Sugar

Element, Compound, or Mixture? Diamond (actually carbon C)

Element, Compound, or Mixture? Diamond (carbon)

Element, Compound, or Mixture? Tea

Element, Compound, or Mixture? Tea

Element, Compound, or Mixture? Salt

Element, Compound, or Mixture? Salt

Element, Compound, or Mixture? Neon Gas

Element, Compound, or Mixture? Neon Gas

Element, Compound, or Mixture? Salad

Element, Compound, or Mixture? Salad

Element, Compound, or Mixture? Pure Water

Element, Compound, or Mixture? Pure Water

Element, Compound, or Mixture? Aluminum

Element, Compound, or Mixture? Aluminum

Element, Compound, or Mixture? Lemonade

Element, Compound, or Mixture? Lemonade

Element, Compound, or Mixture? Silver

Element, Compound, or Mixture? Silver

Element, Compound, or Mixture? Sand

Element, Compound, or Mixture? Sand

Notes Detailed notes are located at: mixtures-notes-isn.pdf Flow Chart: isn.pdf