Welcome to Julias Webfolio

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Welcome to JuliasWeb-folio Learning Tutorial
Unit I- Lifes Building Blocks
Unit II-Energy Matter for Life
Unit III-Continuity of Life
Unit IV-Interactions Interdependence
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Unit I-Site Map
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Topic 1-Simple Organisms
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Key Ideas-Topic 1
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Key Idea 1- Organisms Possess Many Similarities

• - All living organisms have DNA (genetic code for
  life)
• - All living organisms are made up of cells
• - All living organisms carry out the basic life
  functions (nutrition, excretion, respiration,
  transport)
• - All living organisms are apart of the food
  chain
• - All living organisms are apart of a niche (role
  in the environment)

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Key Idea 2-Simple Organisms lack a cellular
organization and can either be prokaryotic or
eukaryotic.

• Prokaryotic
• - Very primitive cell structure lacks cell
  organelles
• - Example Kingdom Monerans (bacteria blue
  green algae)

• Eukaryotic
• - Cells that have a nucleus with DNA inside- and
  other cell organelles
• - Example One celled organisms such as
  paramecium, ameba (Kingdom Protista)

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Lab InvestigationAntibacterial Soaps

• Do they really work?

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Antibacterial Soap-Introduction

• In this lab you will be doing an experiment to
  try to figure out which antibacterial soap works
  better. You will be given three culture dishes,
  one control (without soap), and two variables,
  with different kinds of soap in it. Each culture
  dish will have a source of bacteria. You will be
  observing the bacteria that grows in the culture
  dish.

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Applying the Scientific Inquiry Process
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Problem to Investigate

• Which antibacterial soap is more effective in
  inhibiting bacterial growth?
• Will bacteria develop a resistance to either of
  the soaps?

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Background Information1-Research

• Research on Antibacterial Soaps
• - Bacteria are simple celled organisms that are
  made up of Prokaryotic and Eukaryotic cells
• - Bacteria can adapt to the environment
• - Bacteria can either be pathogenic (disease
  causing) or beneficial (good)
• - Bacteria reproduce rapidly and in clusters
• - Bacteria are apart of the Monera Kingdom which
  is the least complex kingdom

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Background Info2-Prior Experiments

• - Different types of bacteria can grow in
• - Bacteria can out grow other bacteria
• - Waterless soaps dont work as well as regular
  soaps
• - Soil is a good source of bacteria
• - Warmer temperatures are better for growing
  bacteria

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Hypothesis

• I think the white soap will stop bacterial growth
  better than the pink soap. The bacteria in the
  culture dish with the white soap will become
  resistant.
• What do you think?

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Experimental Design

• Materials
• Procedures
• Controls Variables
• Safety Precautionfollow safety instructions
  given by teacher

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Materials

• 3 culture dishes (made with Jello and Slim Fast)
• Antibacterial Soaps (Select two different types
  of soaps I used white soap from the guys
  bathroom and pink soap from the girls bathroom)
• Bacteria source (soil or your own hands I used
  soil)
• Q-tips (cotton swab)
• Labels
• 3 small pieces of plastic wrap
• 3 rubber bands

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Procedures

• - Make the culture dishes (jello, follow the
  instructions on packet but use chocolate slim
  fast instead of juice)
• - Place bacteria in three culture dishes.
  Bacteria can come from soil or your hands. If you
  use soil use a Q-tip to transfer the soil to the
  culture dish

• Label one of the dishes the control. Place
  plastic wrap over it and use a rubber band to
  hold it in place. Set this aside
• -Put the two different soaps in the remaining two
  dishes (one soap in each dish. Label each dish
  with the soap you used.
• -Place all three culture dishes in room
  temperature.
• -Leave out for 7 days and record your
  observations each day in a data chart.

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Controls Variables

• CONTROL
• Culture dish All the bacteria were exposed to
  the same growth medium
• Source of bacteria Each dish was filled with
  soil from the same plant. (If you use your hands
  as the source of bacteria make sure you use the
  same hand)
• Temperature

• VARIABLE(s)
• The culture dishes with the soap in it are the
  variables

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Data ObservationsTable 1 Surface Area
Population Growth
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Data ObservationsTable 2 of Species
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Data ObservationsTable 3Species Competition
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Conclusions Graph 1 Surface Area of Population
Growth

• My hypothesis was not correct. The culture dish
  with the white soap ended up having the most
  bacteria in it.
• The pink hand soap seemed to be more effective in
  killing the bacteria than the white hand soap.
• Bacteria started growing on the second day.
• Some possible reasons the bacteria didnt grow
  until the second day are because the soap was
  working, but then after the first day the
  bacteria developed a resistance to the soap.
  Another reason why it didnt grow is there might
  not have been enough soap or soil in the dish.
• I think the bacteria developed a resistance to
  the soaps. I would be able to tell this if I put
  more soap in the culture dish.
• Natural selection is when nature decides what
  survives and doesnt survive. Antibiotic
  resistance is an example of natural selection
  because bacteria adapts to the environment.
• Natural selection is easily observed in bacteria
  because it reproduces in a shot time and in
  clusters.
• I would define evolution as the growth and
  changes in an organism.

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Conclusions Graph 2 of Species

• On the last day, there were 3 species of
  bacteria in the control. In the culture
  dish with the white soap, there was also 3
  species on the last day. In the pink soap dish
  there were 2 bacteria on the last day.
• Bacteria are able to reproduce so rapidly
  because they adapted to their environment and
  they are asexual.
• Sexual reproduction produce more of a genetic
  variation.
• According to theories in modern genetics,
  genetic variation occurs in asexually
  reproducing organisms by their DNA mutates over a
  period of time which causes genetic variation.

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Conclusions Graph 3 Species Competition

• There were 3 species present in the white culture
  dish.
• The foam species was most abundant on the first
  day.
• On the last day the species were observed the
  foam was the most abundant.
• I think there was competition between species but
  because I only observed them on the last day.
• I think the populations will stop growing when it
  runs out of room to grow.

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Repeated Trials

• View similar experiments by returning to our
  student showcase.

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COMING SOON!Related Topics on Bacteria

• 5-Customizing Bacteria -Genetic Engineering
• 6-Bacteria in Animal Nutrition Digestion
• 7-Using Bacteria for Environmental Problems

• 1-The Process of
• Evolution
• 2-Unity Diversity A System for Classification
• 3-Bacteria
• Natural Selection
• 4-Ecological Significance of Bacteria

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Topic 1- The Process of Evolution
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Evolution Defined
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Competition
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Genetic Variation
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Topic 2- Unity Diversity A System for
Classification
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Genus Species
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Kingdoms of Life
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Topic 3- Natural Selection
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NATURAL SELECTION DEFINED
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Examples of Natural Selection

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Key Ideas of Natural Selection

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Topic 4- Ecological Significance of Bacteria
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Recycling of Materials
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Bacteria as Decomposers
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Topic 5- Genetic Engineering of Bacteria
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Genetic Engineering
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Recombinant DNA
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Examples of Using Recombinant DNA to Customize
Bacteria

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Topic 6-Bacterias Role in Nutrition Digestion
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The Importance of Nutrition Digestion
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Bacterias Role in Nutrition Digestion
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Topic 7-Bacteria to Solve Environmental Problems
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Bio Remediation
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Uses of Bio-Remediation
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Unit II- Energy for Life

• Coming Soon

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Unit III- Continuity of Life

• Coming Soon!

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Unit IV- Interactions and Interdependence

• Coming Soon!