Living Environment / Diffusion Lab Report Analysis Questions

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1 Living Environment / Diffusion Lab Report Analysis Questions Name: Family: Date: January 5 th, 2015 Base your answers to questions 1-3 on the diagram of a compound light microscope below and on your knowledge of biology 1. State two ways the image of the specimen will be seen when using the microscope. 1) 2) 2. What is the total magnification of this microscope using the high- power objective lens? (1) 43 (3) 100 (2) 53 (4) Describe the steps to bring the specimen into focus and to observe it clearly. Base your answers to questions 4 and 5 on the diagram below and on your knowledge of biology. Thediagram represents a model cell setup. The locations of three different substances are indicated in the diagram. 4 Which statement best describes what will most likely happen after several minutes? (1) The contents of the model cell will change color. (3) The model cell will shrink. (2) The liquid outside the model cell will change color. (4) The model cell will rupture.

5 Which row in the chart below best explains the movement of some molecules between the model cell and the solution in the beaker?

The arrows in the diagram indicate the movement of molecules of oxygen and water into the cell.

Two views through a compound light microscope of a wet- mount slide preparation of cells are shown in the photographs to the right à Which procedure was most likely

2 5 Which row in the chart below best explains the movement of some molecules between the model cell and the solution in the beaker? 6 The diagram below represents a specialized cell located in the root of a plant. The arrows in the diagram indicate the movement of molecules of oxygen and water into the cell. Which row in the chart below correctly identifies the process responsible for the movement of each type of molecule represented in the diagram? 7. Two views through a compound light microscope of a wet- mount slide preparation of cells are shown in the photographs to the right à Which procedure was most likely followed to obtain view B? Base your answers to questions 8 through 10 on the diagram and on your knowledge of biology. A laboratory procedure involving a microscope slide is represented in the diagram to the right. à 8 State one purpose for this procedure. [1] 9 Identify one specific substance represented by the liquid in A. [1] 10 State the purpose of the paper towel labeled B. [1]

3 Base your answers to questions 11 and 12 on the diagram below and on your knowledge of biology. The diagram represents a cell and its changes as a result of two laboratory procedures, A and B. 11 Describe procedure A and explain why it would cause the change shown. [1] 12 Explain why procedure B has the opposite effect of procedure A. [1] Base your answers to questions 13 and 17 on the information and diagram below and on your knowledge of biology. Two models of a cell were made with dialysis tubing and placed in two beakers of fluid, A and B, each containing starch indicator (starch indicator is IODINE), as represented in the diagram below. Enzyme Z was added to the artificial cell in beaker B. The solution outside each cell was tested for the presence of sugar. Initially, no sugar was present in the solution outside each cell. The results after one hour are represented below. 13 State one reason for the color change in beaker A after one hour. [1] 14 Why did the color change in beaker A after an hour? 15 Why one of the molecules in this activity moved and not the other? 16 What is the name of the movement described and observed during this lab activity? 17 How would the results have been different in beaker B if an enzyme that digests protein was used instead of enzyme Z? [1]

4 Name Family: Tuesday, How Much Do You Know About HIV and AIDS? Use your textbook, notes and or Internet to answer the following questions on HIV/AIDS 1. What do the letters H-I-V stand for? 2. What do the letters A-I-D-S stand for? 3. What are the ways HIV/AIDS are spread? 4. What are some ways HIV/AIDS can t be spread? 5. What are some things that can increase your chance of getting HIV? 6. What system in the body does the virus effect? 7. What does the virus do to this system? 8. What is the difference between HIV and AIDS? 9. Can AIDS be cured? Explain why or why not. 10. What do people usually die from when they have AIDS? II. For questions 1-7, tell whether the statement is true or false. If false, correct the statement to make it true. 1. AIDS stands for Auto Immune Deficiency Syndrome. 2. HIV can be transmitted by air, kissing and drinking out of a person s glass. 3. HIV destroys a person s resistance to disease by attacking and destroying t-cells. 4. If a person is infected with HIV, he or she will usually develop AIDS within a year. 5. The cause of death for a person with AIDS usually is some type of infection that the body s weakened immune system can no longer fight off. 6. The majority of person s infected with HIV will develop AIDS. 7. HIV is found in blood, and semen. Answer the following questions. 8. Explain what happens to your immune system when the virus invades. 9. Why can people with AIDS die from the common cold or flu? 10. Can a person control whether they will get AIDS? Explain your answer.

5 Name Family: Wednesday, Allergies Read the following passage about allergies, and then answer the questions below. In your answers, paraphrase, do not copy statements from the passage. An allergy, or allergic reaction, is an abnormal immune response to things that are typically harmless to most people. Any substance that you re allergic to is known as an allergen. Some common allergens include dust, certain foods, and pollen. When you're allergic to something, your immune system thinks that substance (the allergen) is bad for your body. In an attempt to protect your body, the immune system produces antibodies to the allergen. Antibodies then cause certain cells to release chemicals known as histamines, which act on your eyes, nose, throat, lungs, and/or skin to cause symptoms of an allergic reaction Allergies are usually inherited--that means they re passed down to you by your mother or father. If you have an allergy to a certain substance, chances are that one of your parents has allergies, too. In some cases, you can develop allergies if you re exposed to an allergen during a time when you re very sick or your body s defenses are weak (an allergen is any substance that causes an allergic reaction). Some allergies are the same all year round, while other allergies only flare up during certain seasons. Allergies cannot be prevented, but they can be treated and controlled. Talk with your doctor if you think you might have an allergy! If you have allergies, your body is mistaking a harmless substance for an invading germ. To fight off invading germs, the immune system forms proteins called antibodies. Antibodies bind with the germs and disable them. In a typical immune response, the immune system triggers the release of a protein called histamine. Histamine speeds the immune response by causing infected tissue to swell with antibody-rich fluids. Because it causes inflammation of the skin and breathing passages, this histamine response can cause a raw, itchy feeling. 1. What is an allergy? 2. What are some common substances that people are allergic to? 3. How does the body respond when exposed to an allergen? 4. What are some common side effects of suffering from an allergy? 5. What is a histamine?

My Dream for Science and Technology Type your introduction paragraph here. Your introduction should be your explanation of why Martin Luther King is so important to celebrate his legacy.

Continue to develop your vision for the future of Science and Technology and how you visualize your future being better by improvements made in science and technology.

6 My Dream for Science and Technology Type your introduction paragraph here. Your introduction should be your explanation of why Martin Luther King is so important to celebrate his legacy. In his I have a Dream Speech he wrote about his hope for equal rights and fairness for all, what is your dream for Science in the future? Your introduction paragraph must be this long. Continue to develop your vision for the future of Science and Technology and how you visualize your future being better by improvements made in science and technology. Give specific examples of ways in which you hope science and technology can improve our lives, our world. Choose a unit from our class (Genetics, reproduction, ecology, Human and Plant Biology, The environment) and discuss your vision for the future in the area/unit you chose. Again, be specific about the way you hope and dream our future can be improved in those areas. Lastly discuss and explain the role you think you play in contributing to that dream and those hopes of improving our lives, our future with science and technology. Your paragraph must be this long. Now write a closing paragraph for your writing. In your closing paragraph compare yourself to Martin Luther King in terms of your dream and his. His dream was/is being achieved, do you think yours can be achieved? How? Continue to develop your closing paragraph, be specific with your arguments as to how exactly do you see your dream for science and technology being achieved. Continue to write a couple more sentences, your closing paragraph must be this long. Name: Family: / Living Environment / Mr. Gil

7 Living Environment /Mr. Gil Martin Luther King Write up is due Thursday January 8 th, Thursday Homework: Study for the Quiz on Friday.

Name: NYS DIFFUSION LAB REVIEW Date: PACKET 1: Difusion Through a Membrane

Name: NYS DIFFUSION LAB REVIEW Date: PACKET 1: Difusion Through a Membrane 1. The diagram below represents a laboratory setup used to demonstrate the movement of molecules across a selectively permeable