1 / 29

The Microscope

The Microscope. 7 th Grade Lab Activity. Do Now…. Which of the scientists who contributed to the development of the cell theory do you think is the most important? Explain your thoughts. . Objectives. Students will… Learn the names of microscope parts Learn how to use a microscope

zoie
Download Presentation

The Microscope

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Microscope 7th Grade Lab Activity

  2. Do Now… • Which of the scientists who contributed to the development of the cell theory do you think is the most important? Explain your thoughts.

  3. Objectives • Students will… • Learn the names of microscope parts • Learn how to use a microscope • Prepare objects for viewing under a microscope • Examine several objects under a microscope • Determine how the lens system of a microscope changes the position of an object being viewed

  4. The Microscope • A microscope is a scientific tool used to see very small objects. • Objects you cannot see with your eyes alone can be seen using a microscope. • In this experiment you will look at a small letter e cut from a magazine, some thread and a strand of hair. • Activity will be completed in partners • Please read through the lab carefully and follow all directions. • Review how to prepare a slide.

  5. Partner Pairs • Anna/Gabby • Maddie/Caroline H. • Megan/Julia • Caroline K./Rachel • Abby/Gabrielle • Salvo/Owen • Ryan/Jake • Greyson/Michael S. • Michael C./Sean

  6. For Next Time…. • Read pgs. 232-235. • Finish lab if needed.

  7. Viruses 7th Grade

  8. Do Now… • Define bacteria, virus and host cell on index cards.

  9. Objectives Students will… • Explain how a virus makes copies of itself • Identify the benefits of viruses • Investigate some uses of viruses

  10. What are viruses? • A virus is a strand of hereditary material surrounded by a protein coating. • They don’t have a nucleus, other organelles or a cell membrane. • A virus multiples itself by making copies with help of a living cell a called a host cell.

  11. Active Viruses pg. 232

  12. Inactive Viruses • Some viruses can be inactive and are called latent. • Latent means that after the virus enters the host cell, its hereditary material becomes part of a host cell’s hereditary material. • It does not immediately cause the host cell to make new viruses or destroy it. • Ex: Cold sores-virus stays in people forever but only causes symptoms once and a while.

  13. How do viruses affect organisms? • Viruses affect many living things. • Most viruses only affect specific kinds of cells---limited to only one host species. • This is why humans can have viruses that don’t affect other animals or plants and vice versa. • A few viruses affect a broad range of hosts like the rabies virus. • A virus cannot move by itself, but can reach a host’s body in several ways. • 1) Carried by wind • 2) Inhaled by animal • Finally, viruses and the attachment sites of the host cell must match exactly, like a puzzle.

  14. Treating and Preventing Viral Diseases

  15. Research with Viruses • Gene therapy/transfer is one way that viruses are helpful. • 1) Normal hereditary material is enclosed in viruses. • 2) The viruses infect the defective cells • 3) New hereditary materials enter the cells and replace the defective hereditary material.

  16. Research with viruses • An active area of viral research is HIV/AIDS research. • HIV= Human immune-deficiency virus, a virus that attacks the immune system. • AIDS=Acquired Immune Deficiency Syndrome. • A weak immune system means the body cannot fight other diseases or infections like pneumonia and certain types of cancer. • Currently, there is no known cure for AIDS.

  17. Videos • Introduction to Viruses • Viruses

  18. For Next Time… • Complete Virus Worksheet (Reinforcement)

  19. Lab: Comparing Cells 7th Grade

  20. Do Now Together • http://safeshare.tv/w/lREZUFZLHk (Cheek Cell Preparation) • http://safeshare.tv/w/ptwfmpHfpL (Elodea Plant Preparation)

  21. Objectives • Students will… • Compare and contrast an animal cell (cheek cell) and a plant cell (elodea).

  22. Partner Pairs • Anna/Gabby • Maddie/Caroline H. • Megan/Julia • Caroline K./Rachel • Abby/Gabrielle • Salvo/Owen • Ryan/Jake • Greyson/Michael S. • Michael C./Sean

  23. Lab: Comparing Cells • Review lab procedures/directions/precautions • Carefully review the lab with your assigned lab partner (same from microscope lab) • Answer lab preview questions. • Prepare cheek cell/elodea cell slides. • View slides under microscope according to lab directions. • Complete lab questions.

  24. For Next Time… • Have fun at the Christmas Concert Tonight 

  25. Comparing Cell Lab (Part 2) 7th Grade

  26. Do Now… • With your lab group, complete the virus enrichment worksheet.

  27. Lab: Comparing Cells • Review lab procedures/directions/precautions • Carefully review the lab with your assigned lab partner (same from microscope lab) • Answer lab preview questions. • Prepare cheek cell/elodea cell slides. • View slides under microscope according to lab directions. • Complete lab questions.

  28. Cell Videos • Crash Course Animal Cells • Crash Course Plant Cells

  29. For Next Time… • Complete Chapter 8 Review #1-20 pg. 240 in science notebook. • Study for test on Thursday, 12/19.

More Related