Science chemistry (words,defs+pics)


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Science chemistry (words,defs+pics)

  1. 1. Photo Chemistry 7 By: Kuba Kalecinski Miss. Wolfenden’s Grade 7 Science Class
  2. 2. Matter Anything that takes up space. ( The three states of matter are solid, liquid, and gas .) Here I have an object, our school playground.
  3. 3. Non Matter <ul><li>A chemical, a substance, or an object that has no mass. </li></ul>This is a picture of the sunshine. Not really clear, but still non matter.
  4. 4. Pure Substance <ul><li>An object or substance that is made up of one property. (For example, a diamond) </li></ul>
  5. 5. Element <ul><li>A pure substance that cannot be broken into simpler substances. </li></ul><ul><li>(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.) </li></ul>
  6. 6. Compounds <ul><li>A pure substance made up of two or more different chemical elements </li></ul>Salt. Look closely, and you’ll see it.
  7. 7. Mixtures <ul><li>Substances held together by physical forces. </li></ul>Soda
  8. 8. Heterogeneous Mixtures <ul><li>A mixture that does not have composition and properties. </li></ul>Saltwater
  9. 9. Homogenous Mixtures <ul><li>A substance or material that has only one type of compound or element. </li></ul>Honey…
  10. 10. Mass <ul><li>Measure of matter in an object. </li></ul>A building representing MASS.
  11. 11. Volume <ul><li>Measures the size of an object using length measurements, in three dimensions. </li></ul>Another building, representing VOLUME this time.
  12. 12. Suspension <ul><li>When particulates have a degree greater than 1000 nm, so it is visible to a naked eye. </li></ul>Mud. I know, looks way worse than mud… Sorry about that…
  13. 13. Emulsion <ul><li>When two or more liquids together don’t mix that well </li></ul>Milk. In a white cup…Sorry if you can’t see it.
  14. 14. Mechanical Change <ul><li>A change that you cannot see. </li></ul>
  15. 15. Reversible Change <ul><li>When something can turn back into a original form. </li></ul>Ice cream! It is a reversible change because it can be refreezed.
  16. 16. Non Reversible Change <ul><li>When something cannot turn back to its original form after it changed. </li></ul>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.
  17. 17. Physical Change <ul><li>A change, where a substance changes from one physical state, to another, but no other substances are formed. </li></ul>1 st Picture 2 nd Picture Pencil sharpener Pencil A broken pencil
  18. 18. Chemical Change <ul><li>A change where new substances are formed. </li></ul>
  19. 19. References <ul><li>A reference is when you show where you got your information from. Here are my source websites and other sources I used: </li></ul><ul><li>- http:// </li></ul><ul><li>- </li></ul><ul><li>-Science 7 (Textbook) </li></ul><ul><li>- </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul>