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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

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the microscope

The Microscope

7th Grade

Lab Activity

do now
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
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
the microscope1
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.
partner pairs
Partner Pairs
  • Anna/Gabby
  • Maddie/Caroline H.
  • Megan/Julia
  • Caroline K./Rachel
  • Abby/Gabrielle
  • Salvo/Owen
  • Ryan/Jake
  • Greyson/Michael S.
  • Michael C./Sean
for next time
For Next Time….
  • Read pgs. 232-235.
  • Finish lab if needed.
viruses
Viruses

7th Grade

do now1
Do Now…
  • Define bacteria, virus and host cell on index cards.
objectives1
Objectives

Students will…

  • Explain how a virus makes copies of itself
  • Identify the benefits of viruses
  • Investigate some uses of viruses
what are viruses
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.
inactive viruses
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.
how do viruses affect organisms
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.
research with viruses
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.
research with viruses1
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.
videos
Videos
  • Introduction to Viruses
  • Viruses
for next time1
For Next Time…
  • Complete Virus Worksheet (Reinforcement)
do now together
Do Now Together
  • http://safeshare.tv/w/lREZUFZLHk (Cheek Cell Preparation)
  • http://safeshare.tv/w/ptwfmpHfpL (Elodea Plant Preparation)
objectives2
Objectives
  • Students will…
  • Compare and contrast an animal cell (cheek cell) and a plant cell (elodea).
partner pairs1
Partner Pairs
  • Anna/Gabby
  • Maddie/Caroline H.
  • Megan/Julia
  • Caroline K./Rachel
  • Abby/Gabrielle
  • Salvo/Owen
  • Ryan/Jake
  • Greyson/Michael S.
  • Michael C./Sean
lab comparing cells1
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.
for next time2
For Next Time…
  • Have fun at the Christmas Concert Tonight 
do now2
Do Now…
  • With your lab group, complete the virus enrichment worksheet.
lab comparing cells2
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.
cell videos
Cell Videos
  • Crash Course Animal Cells
  • Crash Course Plant Cells
for next time3
For Next Time…
  • Complete Chapter 8 Review #1-20 pg. 240 in science notebook.
  • Study for test on Thursday, 12/19.