Friday, January 21, 2011

The bacteria are coming!





Here are some images from our bacteria experiment.

You chose several chemicals to place on your agar petri dishes.

Why did you chose the chemicals you did?

What are you expecting will happen to the bacteria that will (hopefully) grow on the plate?

Mr. F :-)
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8 comments:

  1. AnonymousJanuary 24, 2011 at 6:26 PM

    We chose these chemicals because they all claim to kill around 99% of the germs. We are testing them on bacteria on the petri dish to see if they actually do what they say.

    -Richard

    ReplyDelete
  2. AnonymousJanuary 24, 2011 at 7:30 PM

    I am really interested to know the effect of mouthwash, is it 99.99% effective?
    -Matt:)-

    Interesting Fact:)----Writing down your worries just before taking an exam can boost your test score.

    Interesting Fact 2----Gold is so rare that the world pours more steel in an hour than it has poured gold since the beginning of recorded history.

    ReplyDelete
  3. Swathy =]January 26, 2011 at 2:50 PM

    I thought that the mouthwash would kill 99% of the germs! I was really surprised when I saw that bacteria formed there. It was a little disturbing to know that it might not really kill all your germs...

    ~Swathy =)

    ReplyDelete
  4. AnonymousJanuary 30, 2011 at 5:02 PM

    my group chose vinigur, lysol, and mouth wash and there semed to be a large area that had grown so its definetley working. I am happy to say that there isnt really any bacteria near the mouth wash and lysol though since they are difinfectints. Also I tried to o the homework online and when i opened the lesson page it would exit out of the internet so i was woundering if i could do it in advisory tomorow morning.

    -Rachel:)

    ReplyDelete
  5. Jim FordeJanuary 30, 2011 at 5:05 PM

    Hi rachel,

    Arte you doing homework for lesson 49 or 50? If you send me your email address I can send you the lesson pdf from the textbook.

    I won't publish your address.

    Mr. F :-)

    ReplyDelete
  6. AnonymousJanuary 31, 2011 at 4:14 PM

    I can not believe that the Listerine can't even kill less germs than the control. It makes me think twice about using listerine.


    -Joseph Magnifico

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  7. The Girl Behind the MaskFebruary 2, 2011 at 3:51 PM

    I chose the mouth wash as one of my chemicals to put in the petri dish, and I think that its allowing bacteria to grow because although its supposed to kill around 99% of germs, its meant for a person's mouth, so it can't be very strong (a person's mouth would be affected if it was). Also, the mouth wash might be meant to only attack certain types of germs, so its not killing the ones in the dish.

    ~*Tanu*~

    ReplyDelete
  8. Swathy =]February 3, 2011 at 6:28 PM

    I couldn't belive that there was a lot of mold growing near and on the mouthwash paper. Even the water keeps the bacteria away!

    -Swathy =]

    ReplyDelete