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anonymous

  • one year ago

Please help!!! I will medal and fan :)

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  1. anonymous
    • one year ago
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    2 more questions to this please help!

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  2. taramgrant0543664
    • one year ago
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    Which one do you think it is?

  3. sweetburger
    • one year ago
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    What was always the same in experiment even when another variable changed.

  4. anonymous
    • one year ago
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    I'm thinking C, I'm not really good with science.

  5. Photon336
    • one year ago
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    The control something that isn't changed

  6. Photon336
    • one year ago
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    they're testing the effects of cleaner on the growth of mildew. so think.. they use two cleaners, and they want to test the effectiveness of each, how would they know how effective they are if they didn't have a third group where no clearer is used?

  7. Photon336
    • one year ago
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    so you need to think about what was kept constant in this experiment in terms of the control @sunflow1

  8. anonymous
    • one year ago
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    Okay, so I think Brand X was kept constant because it was good for 3 days.

  9. Photon336
    • one year ago
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    hmm. if i'm correct the the numbers correspond to the area as in the growth of mildew so for brand X you can see that for three days the mildew is virtually non-existent it's zero. but for brand Y there are values for three of the days so which one would be more effective?

  10. anonymous
    • one year ago
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    Uhh Barnd Y... @Photon336

  11. Photon336
    • one year ago
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    @sunflow1 think of it this way. the purpose of this experiment is that you want to see which brand is more effective at killing mildew. the brand that's more effective at killing mildew will be the one that has the lowest area in growth mm follow?

  12. anonymous
    • one year ago
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    Yes. Sorry if I'm frustrating you.

  13. Photon336
    • one year ago
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    no you're not; it's probably that I'm not explaining it clear enough

  14. Photon336
    • one year ago
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    so we can see that BRAND X is the better cleaner than BRAND Y because the area in mm for the mildew for brand X is much less

  15. anonymous
    • one year ago
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    Yes.

  16. Photon336
    • one year ago
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    (note they said something else): " they made sure that they did the experiment on the same tiles"

  17. anonymous
    • one year ago
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    yeah

  18. Photon336
    • one year ago
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    why is this important?

  19. anonymous
    • one year ago
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    It's Important because they want to make sure they are testing it right...im not sure.

  20. Photon336
    • one year ago
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    yeah.. that's correct ( because if they used different tiles) then the mold might grow faster or slower depending on the tile and they want to make sure that they are testing it correctly/

  21. Photon336
    • one year ago
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    so would that be our control?

  22. anonymous
    • one year ago
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    Wait is a control a factor in an experiment that remains the same

  23. Photon336
    • one year ago
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    yes that is correct

  24. anonymous
    • one year ago
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    so that means it would be C

  25. Photon336
    • one year ago
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    yeah that makes most sense to me the four days wouldn't be controls and the two sprays would be controls either so those are out.

  26. anonymous
    • one year ago
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    awesome. Can you help with the last two? @Photon336

  27. Photon336
    • one year ago
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    yeah

  28. anonymous
    • one year ago
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    Ok. Here they are.

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  29. Photon336
    • one year ago
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    let me ask you this question: what are we manipulating here in this experiment? @sunflow1

  30. anonymous
    • one year ago
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    The tiles independent variable the one factor that a scientist changes during an experiment; also called manipulated variable

  31. anonymous
    • one year ago
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    And I think its D..

  32. Photon336
    • one year ago
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    I believe that it's the type of cleaner

  33. Photon336
    • one year ago
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    because they used the same tiles remember?

  34. anonymous
    • one year ago
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    yes, I kind of confused. :(

  35. Photon336
    • one year ago
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    @sunflow1 what changes as a result of using a different cleaner?

  36. anonymous
    • one year ago
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    the tiles?

  37. Photon336
    • one year ago
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    it's the size of the mildew

  38. anonymous
    • one year ago
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    Oh right, so it would be B bc the midew changes

  39. anonymous
    • one year ago
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    Mildew*

  40. Photon336
    • one year ago
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    so the size of the mildew depends on the cleanser used does that make sense and why?

  41. anonymous
    • one year ago
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    Yes, because if the mildew grows and grows that means that type of cleanser isn't the kind you want to get. If its less mildew than its the type you would want, am i right?

  42. Photon336
    • one year ago
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    yes perfect

  43. Photon336
    • one year ago
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    so what would be the independent variable and what responds to it ( the dependent variable?)

  44. anonymous
    • one year ago
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    The independent variable would be B?

  45. Photon336
    • one year ago
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    independent variable = type of cleanser used dependent variable = growth of the mildew

  46. Photon336
    • one year ago
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    does this make sense to you? if not let me know

  47. anonymous
    • one year ago
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    Yes

  48. anonymous
    • one year ago
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    Ok thank you so much

  49. Photon336
    • one year ago
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    yeah last thing: Independent variable is what causes the other variable to change dependent variable. in our case the type of cleanser is what influences the growth of the mildew

  50. Photon336
    • one year ago
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    once you've identified that relationship you can't get it wrong ever because that's really what it is at the core of it all.

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