have ingested caffeine that day making the tests unfair‚ I will use Daphnia‚ a crustacean. They have on contact with caffeine making it fair. It will be easier to observe as it has a translucent body‚ making it able to see the heart beating under a microscope. It will be a "blind study" to avoid bias results‚ so everyone will be unaware what the solution consists of. Purpose The purpose of my experiment was to determine how caffeine affected the heart rate of Daphnia. Hypothesis I believe
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and even strengthen hair is unending. The question that we posed for this lab was: Does hair conditioner really actually strengthen hair as it promises? Materials Conditioner Plastic cup Forceps Hair (from Nate‚ Alyssa‚ Makenna‚ and Lisa) Microscope Water Pipette Glass slides Cover slips Sharpie Towels Spring scale Video camera ! Methods Conditioner was chosen that promised to strengthen and visibly repair hair. To try to observe any physical differences‚ a sample was taken
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people developed the tools that could assist us to study those tiny organisms that cannot be seen by the naked eye. In the year 1590‚ the very early microscope was invented. (Satellite Events Enterprises Inc.‚ 1999) This tool made it easy to see microscopic organisms that people were unable to ever seen before. The first time that the microscope was used to in a study was in the early 1660’s by the English Scientist Robert Hooke. Hooke examined plants and that is when he first saw what we now
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water flea – Daphnia * Caffeine of 5 different concentrations * Microscope * Counter * Cavity Slide * Pipettes * Stop clock * Distilled water * Test tubes * Petri dish Method: 1. Remove one Daphnia and place it in the cavity slide 2. Remove the pond water and replace it with distilled water 3. Leave it for 5 minutes to acclimatize‚ then observe the heart rate under the microscope for 30 seconds‚ multiply the number by 2 to calculate the beats/min
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lenses found in a microscope. Eyepiece or ocular lens Objective lens Recall the units used to measure microscopic objects. Micrometres Recall what happens to the field of view as the magnification used increases. As the magnification increases‚ then the amount of the specimen you can see (the field of view) gets smaller. Name two different types of: Light microscope- monocular microscope and the binocular microscope. Electron microscope- transmission electron microscopes and scanning electron
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the Botana Curus ‚ using microscopes simulated electrophoresis and much more. MATERIALS: The materials we used : 1) The Lab packet 2) Foam cups 3) Chromatography paper 4) Pen or Pencil 5) Microscope slides for species x ‚y ‚z ‚and the Botana Curus 6) Microtip dropper 7) Plant extract 8) Microscope 9) H2O Procedures:
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similarities and differences exist because of varied life functions. Purpose: In this lab‚ you will find out how plant and animal cells are alike and how they are different. Material ● Microscope ● slides & coverslips ● water ● cell stains: iodine & methylene blue ● toothpicks ● lens paper ● paper ● pen/pencil Introduction: Ever since the first microscope was used‚ biologists have been interested in studying the cellular organization of all living things. After hundreds of years of observations by many biologists
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: -Device used to overcome the limitation of sight. -Device used to overcome the limitation of hearing. Device used to overcome the limitation of sight. (Microscope) [pic] Instrument to magnify object such as virus Objective lens and eyepiece magnifying image Types: light microscope‚ electron microscope (Magnifying glass) [pic] Limited magnifying power-10 to 15 times Use to see small objects Magnifying glass is convex lens (Telescope)
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INTRODUCTION Defects of Hearing •Hearing defects means ear is not working correctly or as well as it should. •It may occur in more than one part of the ear. •1. DEAF-full or partial decrease in the ability to detect or understand sounds. Deaf usually caused by : - Eardrum is torn-cannot function - Ossicle bone fused together-can’t vibrate - Auditory nerve damaged by loud sound - Cochlea damage due to sickness/ drugs •2. Temporary hearing loss-build-up of earwax •3. Presbycusis- hearing loss
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being kept‚ in order to deeply analyze the ladder. He took apart the ladder to use microscopes and a variety of lightening and photographic techniques to examine the wood and cleats.
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