essential question: eq: how do we know bacteria are living? lt: i can be able to summarize the...
TRANSCRIPT
Essential Question:
EQ: How do we know bacteria are living?
LT: I can be able to summarize the characteristics of bacteria (shape, size, reproduction and examples ) 8I 1.1
POU:
I will make a set up agar plates based on different scenarios (hand washing or sanitizer) or location. I can predict which agar plate will grow the most bacteria
F and R: Thursday 11/6 Use the last page in your notebook for the week.
Explain the difference between a hidden vs. an active virus.
Voice Level “0”
Remind 101:
Text to 252-772-9193
@0ccc0
It will respond back and ask for your name
Create a flap book foldable of the steps “How Viruses Multiply”• Create a 5 or 6 window foldable
displaying either Active or
Hidden Viruses steps.
Reference Pictures in Google
Drive
“How
Viruses M
ultiply”A
ctive or Hidden
Nam
e__________ P
eriod__
Step 1: Picture
Step 2: Picture
Step 3: Picture
Step 6: Picture
Step 4: Picture
Write out steps under flaps
Step 5: Picture
ORComic Strip
Yesterday our Focus was….
LT: Students will be able to summarize the characteristics of virus (structure, size, naming and replication)
POU: I can describe viruses.
I can explain why viruses are not alive.
I can describe the way the viruses multiply
Grab a # ..• 1. Explain size of viruses• • 2. Explain structure of viruses• • 3. Explain why viruses are considered non-living• • 4. Explain how viruses replicate/multiply• • 5. Explain how viruses are named• • 6. Why are viruses unique?•
2nd Quarter Table of Contents 1
Title Assignment #
Coming Soon 2
Viruses- Notes 3
Microbe Vocab - Frayer on Back 4
Brainpop: Virus (Front) and Bacteria(Back) 5
Bacteria Growth Lab (2 pages) 6
Microbes Vocab 4
1. Microbe - – any organism or near life form that cannot be seen with the naked eye
2. Virus- A tiny non-living particle that enters and reproduces inside a living cell. They are composed of nucleic acid (DNA or RNA) and a protein coat.
3. Host – organism that provides energy (Example: human, dog, tomato)
4. Parasite an organism that is living on or in a host cell that causes harm to the host
5.Bacteria- single-celled organisms that lack a nucleus, prokaryotic
6. Prokaryotic-organism that lacks a nucleus (has DNA) and other cell structures
7. Fungi- A eukaryotic organism that has cell walls, use spores to reproduce, and is a heterotroph that feeds by absorbing its food.
8. Eukaryotic either unicellular or multi-cellular organism that contains membrane-bound organelles and genetic material within a nucleus.
Brainpop: Virus (front) 5 Bacteria (Back)
10 Facts
Take Quiz
Bacterial Growth Lab 6 **Label 2 front pages with this same title**
Copy the Purpose and Start Day in your Notebook.
ControlWhat does this mean? Why do we need one?
As we begin, the next set of plates,
bacteria is all around us.
Which method hand washing or hand sanitizer do you think will get rid of bacteria the best?
Dish A: Hand washing
Dish B: Hand sanitizer
Side 2Used Hand sanitizer
Side 1Unwashed
Dish D: Location ??
Dish C: Location ??
Once you have prepared all you plates, take a picture of the ALL the plates on a white background
Microbes Vocab 4
1. Microbe - – any organism or near life form that cannot be seen with the naked eye
2. Virus- A tiny non-living particle that enters and reproduces inside a living cell. They are composed of nucleic acid (DNA or RNA) and a protein coat.
3. Host – organism that provides energy (Example: human, dog, tomato)
4. Parasite an organism that is living on or in a host cell that causes harm to the host
5.Bacteria- single-celled organisms that lack a nucleus, prokaryotic
6. Prokaryotic-organism that lacks a nucleus (has DNA) and other cell structures
7. Fungi- A eukaryotic organism that has cell walls, use spores to reproduce, and is a heterotroph that feeds by absorbing its food.
8. Eukaryotic either unicellular or multi-cellular organism that contains membrane-bound organelles and genetic material within a nucleus.
Work on Brainpop: Viruses
Glow GERM…
Lets see how well you wash your hands…..
Did not get to….
Populations, Biomass, Bacteria and Viruses 4:40 seconds
Life By Numbers
Click for Life By Numbers Video
http://www.youtube.com/watch?feature=player_embedded&v=fWc46NCnldo
Show beginning about # of humans and then start at 2:38 fungus, bacteria and virus.
Discovery Education Understanding Bacteria:
(3:55 minutes)
Bacteria Notes 7
USDA NIFSI Food Safety in the Classroom©University of Tennessee, Knoxville 2006
Bacteria are ALIVE!
• What does it mean to be alive?
– They reproduce (make more of themselves)
– They need to eat and produce waste
USDA NIFSI Food Safety in the Classroom©University of Tennessee, Knoxville 2006
Bacteria are:
• Prokaryotic single-celled organisms
• Need a microscope to see
• Can be found on most materials and surfaces– Billions on and in your body right now
E. Coli O157:H7 can make you very sick.
Streptococcus can cause strep throat.
This E. coli helps you digest food.USDA NIFSI Food Safety in the Classroom©
University of Tennessee, Knoxville 2006
Shapes of bacteria
• Cocci – sphere shaped
• Bacilli – rod shaped
• Spirilli – spiral shaped
Other images of the shapes..
Some exist as single cells, others cluster together
Bacilli SpiralCocci
Cluster of cocciUSDA NIFSI Food Safety in the Classroom©University of Tennessee, Knoxville 2006
How do bacteria reproduce ?
Bacteria reproduce by binary fission. They divide into two identical bacteria.
USDA NIFSI Food Safety in the Classroom©University of Tennessee, Knoxville 2006
Bacterial Animation
• Click for Bacterial Growth
About 1 minute
• http://www.ryancshaw.com/Files/micro/Animations/BacterialGrowth/PLAY_bacterial_growth.html
Only a build of waste ordepletions of food will stop growth
Bacteria eat by…?• Make their own food from
sunlight—like plants
or
• Some are scavengers– Share the environment around them
• Example: The bacteria in your stomach are now eating what you ate for breakfast
• Some are pathogenic – They attack other living things
• Example: The bacteria on your face can attack skin causing infection and acne
Photosynthetic bacteria
Harmless bacteria on the stomach
lining
E. Coli O157:H7 is a pathogenUSDA NIFSI Food Safety in the Classroom©
University of Tennessee, Knoxville 2006
What is a pathogen?
• Bacteria can make you sick
– Why do they make you sick?
• To get food they need to survive and reproduce
– How do they make you sick?
• They produce poisons (toxins) that result in fever, headache, vomiting, and diarrhea and destroy body tissue
USDA NIFSI Food Safety in the Classroom©University of Tennessee, Knoxville 2006
What are some common pathogens?
Some common pathogens are: • E. coli
(like O157:H7)– Found in ground beef, contaminated fruits and
vegetables
• Salmonella– Found in raw meats, poultry, eggs, sprouts, fruit
and vegetables
• Listeria– Found in deli foods, lunch meats, smoked fish
and vegetables
E. coli O157:H7
Salmonella
ListeriaUSDA NIFSI Food Safety in the Classroom©
University of Tennessee, Knoxville 2006
Examples of PathogensSalmonella
Staphylococcus aureus
Campylobacter jejuni
E. coli O157:H7
What shape are these bacteria?
Cocci, bacilli, or spiral?
USDA NIFSI Food Safety in the Classroom©University of Tennessee, Knoxville 2006
• (
Streptococcus (Strep Throat)
Bacillus (E. Coli)
Staphylococcus (Staph Infection)
Spirochete (Syphilis)
Flesh-eating Bacteria (MRSA)
Where do you get a pathogen?
• Contact with people who are sick
– Direct or indirect
• Food, Water, or other Surfaces that are contaminated
Indirect contact
Direct contact
Foods that could be
contaminated
USDA NIFSI Food Safety in the Classroom©University of Tennessee, Knoxville 2006
A Closer Look – Where do you get a pathogen
Indirect Contact
Direct Contact
Foods and water may be
contaminated
USDA NIFSI Food Safety in the Classroom©University of Tennessee, Knoxville 2006
Are all bacteria pathogens?
• Most bacteria are harmless
USDA NIFSI Food Safety in the Classroom©University of Tennessee, Knoxville 2006
• Some are even helpful– Examples of helpful bacteria:
• Lactobacillus: makes cheese, yogurt, & buttermilk and produces vitamins in your intestine
• Leuconostoc: makes pickles & sauerkraut
• Pediococcus: makes pepperoni, salami, & summer sausage
USDA NIFSI Food Safety in the Classroom©University of Tennessee, Knoxville 2006
A Closer Look – Helpful Bacteria
Pediococcus - used in production of fermented meats
Leuconostoc cremoris – used in the production of buttermilk and
sour cream
Lactobacillus casei – found in human intestines and mouth to improve digestion
Lactobacillus bulgaricus – used in the production of yogurt
www.bioweb.usu.edu
USDA NIFSI Food Safety in the Classroom©University of Tennessee, Knoxville 2006
How can I avoid pathogens?
• Wash your hands often so you won’t transfer bacteria to your mouth or food
– Warm water with soap for 20 seconds, rub hard between fingers and nails
USDA NIFSI Food Safety in the Classroom©University of Tennessee, Knoxville 2006
• Cook food thoroughly to kill any pathogens that may be in your food
• Store food properly to limit pathogen growth
– Cold temperatures (40F)
How can I avoid pathogens?
USDA NIFSI Food Safety in the Classroom©University of Tennessee, Knoxville 2006
Review• Bacteria are living organisms
• Most are harmless
• A few are pathogens that make you sick
• You can reduce the risk of getting sick by washing your hands and handling food properly.
USDA NIFSI Food Safety in the Classroom©University of Tennessee, Knoxville 2006
Discovery has a video on bacterial cell division
Title is
Cell Division: Bacteria Reproduction
Time is 3:13 minutes
Show Monday after we look at culture plates