7-1. biotic & abiotic
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7-1. biotic & abiotic






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7-1. biotic & abiotic Presentation Transcript

  • 1. BIOTIC Biotic means living organismMicroorganisms, animals, plants, and humans are bioticcomponents
  • 2. ABIOTIC Abiotic means non-living things Air, water, sunlight, soil, rocks, and fire are abiotic components
  • 3. MICROSCOPE the microscope was first invented by Antony Van Leeuwenhoek based on the sources of light used to lighten the specimen, microscopes can be classified into light microscopes and electron microscopes a light microscope is able to magnify an object up to 1,000x an electron microscope is able to magnify an object up to 100,000x
  • 4. The function of microscope parts Ocular lens to magnify object view Body tube connecting ocular lens and objective lens Revolver objective lens location Objective lens to magnify object Arm part that is held when microscope is moved
  • 5.  Stage place for putting object Stage clips to clip the specimen Coarse adjustment knob / Macrometer to focus image quickly Fine adjustment knob / Micrometer to focus image slowly Diaphragm to adjust light intensity Base to keep microscope’s position
  • 6. How to use microscope1. Hold the arm of the microscope with one of your hands, while your other hand holds the base2. Place the microscope on a flat-surfaced table with its arm right in front of you3. Turn the revolver until you hear a “click”; adjust the position of the lowest magnification objective lens until it reaches the middle position of the stage4. Put the mount/object to observe on the stage and clip the mount using stage clip
  • 7. 5. Adjust that part to observe is pricisely on the stage hole6. While seeing from side view, rotate macrometer carefully that tube of the microscope goes down until it almost touches (never touch) the mount7. While observing by ocular lens, rotate macrometer slowly to raise tube of the microscope that the mount is clearly seen8. Rotate micrometer to get best focus
  • 8. Symbols of Some Hazardous Chemicals  hazardous, sharp and stingy smells  Bromine, Ammonia  Avoid to inhale, while using this material, cover your mouth and nose with masker and do it in acid shelf
  • 9.  Toxic Mercury, Carbon tetrachloride Keep in locked cabinet, never use it without your teacher’s permission
  • 10.  Flammable Alcohol, Natrium, Pho sporus Keep alcohol away from fire, keep sodium in kerosene, keep phosporus in water
  • 11.  Corrosive Chloric acid, Sulfate acid Use it carefully, avoid spilling onto skin or clothing
  • 12.  Explosive Hydrogen, Potassium Never store hydrogen in a laboratory (it may explode when you light in open air), keep potassium in paraffin
  • 13.  Radioactive Carbon-14 Use this material as less as possible (it can destroy your cells)