Science

• Microscope 


  It is used to magnify many things that can be seen by the naked eye
• Microscope 


  It is an important investigate tool used for studying objects and organisms around us.
• Things that can be seen using a microscope

  Plant cell, Animal Cell, Microorganisms
• Resolution 


  Its is the capacity of a microscope to distinguish small gaps between two separate point which human contact cannot distinguish
• Compound microscope


  Optical microscope that uses visible light to form an image, it uses glass lenses to magnify and resolve images
• 3 Major parts of a microscope

  Magnifying, Illuminating, Mechanical parts
• Magnifying


  Parts that make the specimen look bigger.
• Specimen 


  Is an object or an organisms that we study or examine.
• Eyepiece/Ocular lens


  Where the viewer looks and sees the magnified image. (have 10x magnification)
• Objective lenses


  The major lense used for specimen visualization
• Objective lense parts (Low power)


  It has a magnification power of 10x. It is used to see the general outline of the specimen
• Objective lense parts (High power)


  It has a magnification power of 40x. It is used to view structures from a large perspective.
• Objective lense parts (Oil immersion)


  It has a magnification power of 100x. It requires the use of special oil.
• Illuminating party


  The parts of the microscope that supply and regulate light toward the specimen
• Mirror


  It reflects light from external light source through the bottom of the stage which illuminates the specimen
• Iris diaphragm


  It controls the amount of light that reaches the specimen.
• Stage condenser


  It collects and focuses the light from the mirror to the specimen.
• Mechanical parts


  These parts are used for support and in adjusting the different parts of the microscope
• Bodytube


  It holds the eyepiece lens and connects them to the objective lense
• Revolving nosepiece


  It holds different objective lenses and facilities the changing of objectives
• Adjusting knobs (A. Coarse adjusting knobs)


  It moves the body tube and low-power lenses closer or farther away from the stage to view the image of the specimen. It produces a large vertical movement of the stage with only a partial revolution of the knob
• Adjusting knobs (B. Fine adjustment knobs)


  It is used to bring the specimen into sharp focus to show clearly the detailed parts of the specimen.
• Different levels of biological organization from cell to biosphere

  1. Biosphere
  2. Ecosystem
  3. Community
  4. Population
  5. Organism
  6. Organ system
  7. Organ
  8. Tissue
  9. Cell
• Biosphere is the part of the Earth where life exists. It is the part of the Earth where living things exist.
• Ecosystem: a biological community of interacting organisms and their physical environment
• Community: a group of people living in the same place or having a particular characteristic in common
• Population: all the inhabitants of a particular place
• Organism: an individual animal, plant, or single-celled life form
• Organ system is a group of organs that work together to perform a specific function.
• Organ: a part of an organism which is typically self-contained and has a specific vital function
• Tissue: a collection of similar cells working together to carry out a specific task
• Cell: the basic unit of structure and function in all known living organisms