science eduardo osvaldo nov 2014

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science eduardo osvaldo nov 2014
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science eduardo osvaldo nov 2014
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  1. What is a heterogeneous mixture?

    Give 5 examples!
    A heterogeneous  mixture is made of two or more components.

    It is non-uniform and you can see the different components.

    • -gallo pinto
    • -chocolate chip cookies
    • -chocolate chip ice cream
    • -beach sand
    • - salad dressing.
  2. What is a homogeneous mixture?

    Give 5 examples.
    A homogeneous mixture is made of two or more components.

    It is uniform in properties and composition.

    • -iron
    • -black coffee
    • -chocolate milk shake
    • -sugar water
    • -sugar
  3. What is a compound?

    Give 3 examples.
    A compound is a molecule that contains at least two different elements.

    • -water (H2O)
    • -salt (NaCl)
    • -carbon dioxide (CO2)
  4. What is a pure substance?

    Give 5 examples.
    A substance with consistent composition.

    • examples:
    • radon
    • gold
    • xenon
    • silver
    • titanium
    • salt
  5. HOMOGENEOUS OR HETEROGENEOUS>

    spagetti sauce?
    HETEROGENEOUS
  6. HOMOGENEOUS OR HETEROGENEOUS>

    pure air
    homogeneous
  7. HOMOGENEOUS OR HETEROGENEOUS>

    city air
    HETEROGENEOUS>
  8. HOMOGENEOUS OR HETEROGENEOUS>

    chocolate chip icecream
    HETEROGENEOUS>
  9. HOMOGENEOUS OR HETEROGENEOUS>

    sugar
    HOMOGENEOUS
  10. HOMOGENEOUS OR HETEROGENEOUS>

    sugar water
    HOMOGENEOUS
  11. HOMOGENEOUS OR HETEROGENEOUS>

    black coffee
    HOMOGENEOUS
  12. HOMOGENEOUS OR HETEROGENEOUS>

    salad dressing
    HETEROGENEOUS>
  13. HOMOGENEOUS OR HETEROGENEOUS>

    paint
    HOMOGENEOUS
  14. HOMOGENEOUS OR HETEROGENEOUS>

    alcohol
    HOMOGENEOUS
  15. HOMOGENEOUS OR HETEROGENEOUS>

    iron
    HOMOGENEOUS
  16. HOMOGENEOUS OR HETEROGENEOUS>

    aluminium foil
    HOMOGENEOUS
  17. HOMOGENEOUS OR HETEROGENEOUS>

    beach sand
    HETEROGENEOUS>
  18. HOMOGENEOUS OR HETEROGENEOUS>

    soil
    HETEROGENEOUS>
  19. HOMOGENEOUS OR HETEROGENEOUS>

    flat soda drink
    HOMOGENEOUS
  20. When a solid changes into a liquid, it is called
    melting
  21. When a solid changes directly into a gas, it is called...
    sublimation
  22. When a gas changes into a liquid it is called
    condensation
  23. Matter in a solid shape has (a definite/no definite) shape and (a definite/no definite) volume.
    Matter in a solid shape has a definite shape and a definite volume.
  24. How many states of matter are there? Scientists call plasma a state of matter too. You do not have to count plasma as a state of matter for this question.
    THREE
  25. TRUE or FALSE: the states of matter are solids, liquids, gases, plastics.
    FALSE.

    solid, liquid, gas (plasma)
  26. States are also known as

    phases,
    phrases
    frases
    phases
  27. Which phase of matter does not take the shape of the container it is in? solid or liquid
    solid.
  28. True or False. There is very little space between the molecules of a liquid. there is a lot of space between the molecules of a gas.
    TRUE
  29. When solids reach their melting point they become.....
    LIQUIDS
  30. What happens when a gas reaches condensation point?
    It becomes a liquid.
  31. What is evaporation?

    - when liquids turn into vapor.
    - when solids turn into vapor.
    - when liquids turn into vapor.
  32. What state/phase can fit into any container of any size and any shape?

    a) gas  b) solid c) liquid and solid
    GAS
  33. Gas and vapor mean the same.

    TRUE or FALSE?
    FALSE
  34. Which state can hold its own shape?
    SOLID
  35. Which state of matter resists very strongly if you try to change its shape?
    SOLID
  36. The molecules in which state of matter spread our until they fill the container no matter how big the container is?
    GAS
  37. When liquid changes into a solid, it is called ...
    FREEZING
  38. WHICH IS CORRECT?

    Matter in a gaseous state has no definite volume and no definite shape.

    Matter in a liquid state has no definite volume and a definite shape.

    Matter in a solid state has no definite volume and no definite shape.
    Matter in a gaseous state has no definite volume and no definite shape.
  39. Circle alkali metals on periodic table.

  40. Circle alkaline earth metals on periodic table.

  41. Circle halogens on the periodic table.

  42. Circle noble gases on the periodic table.

    • What is chemistry?
    • The study of matter and its changes .
  43. What is matter made up of?
    Atoms which can combine together to form molecules.
  44. What state of matter is water?
    liquid.
  45. chemical or physical change:

    Ashes can be the result of paper reacting with fire.

    Ashes -= ceniza
    CHEMICAL
  46. CHEMICAL OR PHYSICAL CHANGE:
    Gold is a solid metal. It is malleable and it is used to make jewelry.
    Physical .
  47. Chemical or physical change:

    blending eggs, oil and lemon is delicious. these ingredients react and the outcome is mayonnaise
    chemical .
  48. What is a heterogeneous mixture?
    A heterogeneous mixture is one that consists of two or more substances. It is non-uniform and the different components of the mixture can be seen.

    chocolate chip cookies.

    water and oil.
  49. What is a homogeneous mixture?
    A mixture which has uniform composition and properties.

    For example, air is a homogeneous mixture of gases.

    A teaspoonful of table salt stirred into a glass of water also makes a homogeneous mixture.
  50. Heterogeneous or homogeneous?

    Mayonnaise?
    homogeneous
  51. Heterogeneous or homogeneous?
    gallo pinto
    heterogeneous
  52. Heterogeneous or homogeneous?
    azteca soup
    Heterogeneous
  53. Heterogeneous or homogeneous?

    Rice with chicken
    Heterogeneous
  54. Heterogeneous or homogeneous?

    potato salad
    Heterogeneous
  55. Heterogeneous or homogeneous?

    milk
    homogeneous
  56. How are the elements arranged in the periodic table?
    In order of increasing atomic number.
  57. What are the columns called in the periodic table? what do they have in common?
    Groups.

    they contain elements with similar physical and chemical properties.
  58. The elements can be separated into metals, ________ and ________.
    Metals, non-metals and metalloids.
  59. The elements can be separated into main-group elements and _________ elements.
    The elements can be separated into main-group elements and transition elements.

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