Characteristics of Living Things - and - Cells
Wednesday, September 19, 2012
Monday, September 17, 2012
Microscopes & Scientific Method Webquest
Site 1: A-Z Microscope History
Site 2: Microbus
Site 3: Magnification Module
Site 4: Scientific Method in Action (scroll down)
Site 2: Microbus
Site 3: Magnification Module
Site 4: Scientific Method in Action (scroll down)
Microscopes & Scientific Method Webquest
Choose ONE of the following true situations, and answer the questions that follow.
The Strange Case of BeriBeri
In 1887 a strange nerve disease attacked the people in the Dutch East Indies. The disease was beriberi. Symptoms of the disease included weakness and loss of appetite, victims often died of heart failure. Scientists thought the disease might be caused by bacteria. They injected chickens with bacteria from the blood of patients with beriberi. The injected chickens became sick. However, so did a group of chickens that were not injected with bacteria.
One of the scientists, Dr. Eijkman, noticed something. Before the experiment, all the chickens had eaten whole-grain rice, but during the experiment, the chickens were fed polished rice. Dr. Eijkman researched this interesting case. he found that polished rice lacked thiamine, a vitamin necessary for good health.
In 1928, Sir Alexander Fleming was studying Staphylococcus bacteria growing in culture dishes. He noticed that a mold called Penicillium was also growing in some of the dishes. A clear area existed around the mold because all the bacteria that had grown in this area had died. In the culture dishes without the mold, no clear areas were present.
Fleming hypothesized that the mold must be producing a chemical that killed the bacteria. He decided to isolate this substance and test it to see if it would kill bacteria. Fleming transferred the mold to a nutrient broth solution. This solution contained all the materials the mold needed to grow. After the mold grew, he removed it from the nutruient broth. Fleming then added the nutrient broth in which the mold had grown to a culture of bacteria. He observed that the bacteria died.
The Strange Case of BeriBeri
In 1887 a strange nerve disease attacked the people in the Dutch East Indies. The disease was beriberi. Symptoms of the disease included weakness and loss of appetite, victims often died of heart failure. Scientists thought the disease might be caused by bacteria. They injected chickens with bacteria from the blood of patients with beriberi. The injected chickens became sick. However, so did a group of chickens that were not injected with bacteria.
One of the scientists, Dr. Eijkman, noticed something. Before the experiment, all the chickens had eaten whole-grain rice, but during the experiment, the chickens were fed polished rice. Dr. Eijkman researched this interesting case. he found that polished rice lacked thiamine, a vitamin necessary for good health. 1. State the ProblemHow Penicillin Was Discovered
2. What was the hypothesis?
3. How was the hypothesis tested?
4. Should the hypothesis be supported or rejected based on the experiment?
5. What should be the new hypothesis?
In 1928, Sir Alexander Fleming was studying Staphylococcus bacteria growing in culture dishes. He noticed that a mold called Penicillium was also growing in some of the dishes. A clear area existed around the mold because all the bacteria that had grown in this area had died. In the culture dishes without the mold, no clear areas were present.
Fleming hypothesized that the mold must be producing a chemical that killed the bacteria. He decided to isolate this substance and test it to see if it would kill bacteria. Fleming transferred the mold to a nutrient broth solution. This solution contained all the materials the mold needed to grow. After the mold grew, he removed it from the nutruient broth. Fleming then added the nutrient broth in which the mold had grown to a culture of bacteria. He observed that the bacteria died.
1. Identify the problem.
2. What was Fleming's hypothesis?
3. How was the hypothesis tested?
4. Should the hypothesis be supported or rejected based on the experiment?
5. This experiment lead to the development of what major medical advancement?
Wednesday, September 12, 2012
Test Review
Check out these two websites to review the parts of the microscope!
Microscope Labeling Game
Online Microscope Labeling Quiz
Microscope Labeling Game
Online Microscope Labeling Quiz
Microscopes & Scientific Method
The Microscopes & Scientific Method Test will be Tuesday, September 18th.
Today: Students participated in their first microscope lab investigating how a newsprint "e" looks under low and medium power.
Friday: Students will use the scientific method to investigate M&M candies.
Today: Students participated in their first microscope lab investigating how a newsprint "e" looks under low and medium power.
Friday: Students will use the scientific method to investigate M&M candies.
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| photo from: http://www1.broward.edu/~ssimpson/letterE.htm |
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| photo from: http://www.scsastro.co.uk/category/microscopes |
Friday, August 31, 2012
Email Distribution List
The first distribution list email was sent today, 8/31. If you did not receive this email, but would like to receive emails in the future, please email ssmith@madison.k12.al.us with your name, your student's name & class period.
Monday, August 27, 2012
2nd Week Update
- Beginning today, students should be using their composition notebooks in class everyday.
- Our 1st test of the year is tentatively scheduled for Thursday, September 6th and will cover Lab Safety and Lab Equipment.
Notebook Quizzes – Fridays
The quiz covers that week’s Buck Bytes/classwork/labs. (Students answer Buck Byte (Bellwork) questions in notebook every day at the beginning of class.)
5 - 10 questions are randomly selected and students are allowed to use their notebook. This should be an easy grade if the students have kept up with their work and completed it each day.
The quiz covers that week’s Buck Bytes/classwork/labs. (Students answer Buck Byte (Bellwork) questions in notebook every day at the beginning of class.)
5 - 10 questions are randomly selected and students are allowed to use their notebook. This should be an easy grade if the students have kept up with their work and completed it each day.
For example, a quiz question would read: "From Monday, 8/27, what was the answer to Buck Bytes #2?"
There will be a notebook quiz this Friday, August 31st.
There will be a notebook quiz this Friday, August 31st.
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