Science chemistry (words,defs+pics)
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Science chemistry (words,defs+pics)

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Science chemistry (words,defs+pics) Science chemistry (words,defs+pics) Presentation Transcript

  • Photo Chemistry 7 By: Kuba Kalecinski Miss. Wolfenden’s Grade 7 Science Class
  • Matter Anything that takes up space. ( The three states of matter are solid, liquid, and gas .) Here I have an object, our school playground.
  • Non Matter
    • A chemical, a substance, or an object that has no mass.
    This is a picture of the sunshine. Not really clear, but still non matter.
  • Pure Substance
    • An object or substance that is made up of one property. (For example, a diamond)
  • Element
    • A pure substance that cannot be broken into simpler substances.
    • (There were first thought to be only 18 elements, but after many years of study, scientists found 36 elements. The 36 elements are: Hydrogen, Helium, Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Sodium, Magnesium, Aluminum, Silicon, Phosphorus, Sulfur, Chlorine, Argon, Potassium, Calcium, Scandium, Titanium, Vanadium, Chromium, Manganese, Iron, Cobalt, Nickel, Copper, Zinc, Gallium, Germanium, Arsenic, Selenium, Bromine, and Krypton, but there are many, many more in the world of chemistry.)
  • Compounds
    • A pure substance made up of two or more different chemical elements
    Salt. Look closely, and you’ll see it.
  • Mixtures
    • Substances held together by physical forces.
    Soda
  • Heterogeneous Mixtures
    • A mixture that does not have composition and properties.
    Saltwater
  • Homogenous Mixtures
    • A substance or material that has only one type of compound or element.
    Honey…
  • Mass
    • Measure of matter in an object.
    A building representing MASS.
  • Volume
    • Measures the size of an object using length measurements, in three dimensions.
    Another building, representing VOLUME this time.
  • Suspension
    • When particulates have a degree greater than 1000 nm, so it is visible to a naked eye.
    Mud. I know, looks way worse than mud… Sorry about that…
  • Emulsion
    • When two or more liquids together don’t mix that well
    Milk. In a white cup…Sorry if you can’t see it.
  • Mechanical Change
    • A change that you cannot see.
  • Reversible Change
    • When something can turn back into a original form.
    Ice cream! It is a reversible change because it can be refreezed.
  • Non Reversible Change
    • When something cannot turn back to its original form after it changed.
    In that cup, there’s sugar. And it is in BOILING hot water, and will melt soon. It is a non reversible change because once it melts, it’s gone forever.
  • Physical Change
    • A change, where a substance changes from one physical state, to another, but no other substances are formed.
    1 st Picture 2 nd Picture Pencil sharpener Pencil A broken pencil
  • Chemical Change
    • A change where new substances are formed.
  • References
    • A reference is when you show where you got your information from. Here are my source websites and other sources I used:
    • - http:// chemicool.com/definition/
    • -http://ask.com
    • -Science 7 (Textbook)
    • -http://wikipedia.com
    • -answers.yahoo.com
    • http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/M/Mixtures.html
    • -answers.google.com