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1,992 Science Free Essays: 901 - 930

  • Hero


    Reasons for action That climate change is occurring is unquestionable. And almost all scientists have agreed on the cause: Human activities generate greenhouse gases that are dramatically changing our world. There is an overwhelming international consensus that global cooperation and action are essential to curb these emissions. The U.S emits

    Words: 617  •  Pages: 3
  • Heroes


    April 2008 There are some topics I save up because they'll be so much fun to write about. This is one of them: a list of my heroes. I'm not claiming this is a list of the n most admirable people. Who could make such a list, even if they

    Words: 2,632  •  Pages: 11
  • High Rates of Hiv/aids in South Africa

    High Rates of Hiv/aids in South Africa

    High rates of HIV/AIDS in South Africa The high rates of HIV/AIDS in the townships of South Africa are due to traditional beliefs about the sexually transmitted disease. South Africans in townships are uneducated, so they are very easy to be manipulated to believing false beliefs about HIV transmission. False

    Words: 1,027  •  Pages: 5
  • Hippos


    Time to Weigh the Hippos Martha, a caregiver at a wild animal park, is picking up four hippos. She must weigh each of them before she can take them. The only scale large enough to weigh them is a truck scale. The minimum weight that a truck scale can weigh

    Words: 451  •  Pages: 2
  • History Behind Science

    History Behind Science

    While empirical investigations of the natural world have been described since antiquity (for example, by Aristotle, Theophrastus and Pliny the Elder), and scientific methods have been employed since the Middle Ages (for example, by Alhazen, Abu Rayhan Biruni and Roger Bacon), the dawn of modern science is generally traced back

    Words: 853  •  Pages: 4
  • History Of Computers

    History Of Computers

    Chris Miller Ms. Rozanski English III May 20, 2005 History of the Computer The ENIAC (Electronic Numerical Integrator and Computer) was the first large-scale, computer. The ENIAC was built for the military to calculate the paths of artillery shells. Later on it was used to make calculation for nuclear weapons

    Words: 793  •  Pages: 4
  • History Of Criminalistics

    History Of Criminalistics

    DNA typing was first used in Great Britain for law enforcement purposes in the mid- 1980s. It wasn't employed in the United States until 1987. DNA profiling has changed forensic science. DNA technology has given police and the courts a means of identifying the suspects of rapes and murders. Today,

    Words: 515  •  Pages: 3
  • History Of Depo Provera

    History Of Depo Provera

    The History of Depo-Provera Melissa D. Turley LIS 342 University of Illinois at Springfield In this ever-changing world of medicine, the advancement of the different forms of birth control still amaze me. Women have a choice between the old fashioned pill, Norplant implants, Net-En, and the Depo-Provera injection, just to

    Words: 2,250  •  Pages: 9
  • History Of The Cell

    History Of The Cell

    History of the Cell The word cell was coined by Englishman Robert Hooke (1635-1703), after viewing slices of cork in a microscope. The word cell was derived from the Latin word cella meaning small container. The microscope created new possibilities in the study biology. It allowed scientists to look into

    Words: 466  •  Pages: 2
  • History Of The Metric System

    History Of The Metric System

    Unlike today, where most scientific communities use the standard unit of measurement called the metric system, early measurements were based on human body parts. In time, nations developed their own different units of measure. Due to all the different national measurements, it was difficult for scientists to understand each other,

    Words: 691  •  Pages: 3
  • Hiv/Aids Pandamic

    Hiv/Aids Pandamic

    The HIV/AIDS epidemics in Asia and sub-Sahara Africa came from two different drivers which lead to the growing prevalence of HIV/AIDS in these regions. The drivers of HIV/AIDS epidemics in sub-Sahara Africa are "heterosexual intercourses, hidden MSM, culture practices that lead to blatantly unequal gender relations, poverty, civil war (Mayer

    Words: 1,361  •  Pages: 6
  • Hog Farming And The Dangers To The Air And Water

    Hog Farming And The Dangers To The Air And Water

    Hog Farming and the Dangers to the Air and Water Hog farming in North Carolina has been around for thousands of years and has changed over the course of that time. The changes have included better farming techniques, bigger farms, more pigs and along with these changes more and more

    Words: 724  •  Pages: 3
  • Homepathic Practitioners

    Homepathic Practitioners

    Before this project I had no idea what a homeopathic practitioner was or what a bonding agent actually did. A bonding agent, was it something to do with stocks and bonds, or did this 'agent' actually 'bond' something together; a homeopathic practitioner, a doctor maybe? I had no idea how

    Words: 869  •  Pages: 4
  • Homosexuality In The Genome

    Homosexuality In The Genome

    The Gay Gene: Assertions, Retractions, and Controversy This web page was produced as an assignment for an undergraduate course at Davidson College. Introduction: Homosexuality and the rights of homosexuals are enormous issues in our society today. A scientific 'breakthrough' that proved the genetic predetermination of homosexuality would change society drastically.

    Words: 1,945  •  Pages: 8
  • Horizontal Circular Lab

    Horizontal Circular Lab

    Hypothesis: As centripetal force increases, so does the angle on an accelerometer. Introduction: Fc is centripetal force, which always acts toward the center of the circle. This force acting toward the center is the centripetal acceleration. The acceleration is continuously changing because the direction of the object traveling in a

    Words: 397  •  Pages: 2
  • Hormone Levels During The Menstrual Cycle

    Hormone Levels During The Menstrual Cycle

    Lab Exercise 8.5.1 Hormone Levels During The Menstrual Cycle a) WX represents the hormones, which stimulate the follicle, FSH, and YZ represents the thickening of the corpus luteum, done by LH, which produces progesterone (Y). b) The ovarian hormones released by WX is estrogen and progesterone is released by YZ.

    Words: 512  •  Pages: 3
  • Household Appliances And Entertainment Systems

    Household Appliances And Entertainment Systems

    Introduction Technology in household appliances and entertainment systems is making the lives of consumers more convenient, and comfortable while remaining attainable to the masses. However associated with this technology is cost. Cost to the user, cost the environment, and cost to the future. Some of this technology has been used

    Words: 2,305  •  Pages: 10
  • How Airbags Work.

    How Airbags Work.

    For years, the trusty seat belt provided the sole form of passive restraint in our cars. There were debates about their safety, especially relating to children, but over time, much of the country adopted mandatory seat-belt laws. Statistics have shown that the use of seat belts has saved thousands of

    Words: 2,639  •  Pages: 11
  • How Different Concentrations Of Glucose Effects Osmosis In Potato Cells

    How Different Concentrations Of Glucose Effects Osmosis In Potato Cells

    My group and I are carrying out an investigation to find out how different concentrations of glucose affect osmosis in potato cells. Osmosis is the passive process of diffusing water which means within this experiment particles of water will move from a lower concentrated area to an area of higher

    Words: 791  •  Pages: 4
  • How Do The Unique Chemical And Physical Properties Of Water Make Life On Earth Possible?

    How Do The Unique Chemical And Physical Properties Of Water Make Life On Earth Possible?

    How do the unique chemical and physical properties of water make life on earth possible? Heat Capacity - the amount of energy required to raise the temperature of something one degree celcius Cohesive strength - The internal strength of the adhesive. The measure of a label's resistance to removal. Surface

    Words: 543  •  Pages: 3
  • How Does Colour Vision Works

    How Does Colour Vision Works

    Colour vision is the ability of any organism to distinguish different light based on their wavelength of light they reflect .The visual system derives colour by comparing the responses to light from several types of cone receptor in the eyes. Colour enable use to separate object form each other and

    Words: 2,110  •  Pages: 9
  • How Does Length Affect Resistance?

    How Does Length Affect Resistance?

    How does Length affect resistance? Coursework Aim To find out how the length of a wire can affect resistance. Factors affecting resistance  Temperature  Length of wire  Thickness  Type Resistance is a force which opposes the flow of an electric current around a circuit so that energy

    Words: 1,400  •  Pages: 6
  • How Does The Color Of The Product Affect The Buyer

    How Does The Color Of The Product Affect The Buyer

    Introduction The purpose of this project is to see if the color of the product affects the buyer's choices in what to buy. The hypothesis is that younger girls would most likely pick the pink package rather than the purple package. The general procedure will be held at a local

    Words: 805  •  Pages: 4
  • How Fish And Locusts Breathe

    How Fish And Locusts Breathe

    How fish breathe The water surrounding a fish contains a small percentage of dissolved oxygen. In the surface waters there can be about 5 ml. of oxygen per litre of water. This is much less than the 210 ml. of oxygen per litre of air that we breath, so the

    Words: 434  •  Pages: 2
  • How Free Software Developers Work

    How Free Software Developers Work

    How free software developers work The mobilization of "distant communities" Didier DEMAZIERE (CNRS, laboratoire Printemps, UVSQ) FranÐ*ois HORN (CLERSE, IFRESI) Nicolas JULLIEN (MARSOUIN) Free software are programs distributed with their source code (the text of the program written in a programming language that is comprehensible for humans) and with the

    Words: 8,854  •  Pages: 36
  • How Freshwater Resources Are Affected

    How Freshwater Resources Are Affected

    Wherever it appears and whatever its form, every drop of the world's water is locked into the hydrological cycle. However, the speed of movement of water through different phases of the hydrological cycle varies considerably. The average time a drop of water stays in the atmosphere is about eight days

    Words: 293  •  Pages: 2
  • How Long Have People Been On Earth

    How Long Have People Been On Earth

    -Scientists disagree about how long people have been on earth - 40,000years to 2 million 1 discoveries in Africa 2 Tanzania - acehaeologists found remains that may be million years old 3 Also found tools - stone with charpedges 4 Technology - the use of skills and tools to meet

    Words: 268  •  Pages: 2
  • How Oxygen Is Transferred In Plants

    How Oxygen Is Transferred In Plants

    Oxygen produced in the plant by splitting the water molecule. Oxygen is a by product of photosynthesis. In the plant oxygen flows out of the stoma. Oxygen is also released through roots. Plants need oxygen for photosynthesis. Plants have adapted to exchange gas such as lenticels. Plants usually don’t use

    Words: 357  •  Pages: 2
  • How To Treat A Hemorrage

    How To Treat A Hemorrage

    Essay Question: Treating a Hemorrhaging Patient Michael Miller When a hemorrhaging car accident patient bursts through the ER doors, a doctor must first ignore any possible orthopedic injury (e.g. major ligament tear or a skeletal fracture or break) unless one of those injuries is inhibiting the blood flow of the

    Words: 402  •  Pages: 2
  • How To Use The Scientific Method

    How To Use The Scientific Method

    Ask a Question: The scientific method starts when you ask a question about something that you observe: How, What, When, Who, Which, Why, or Where? And, in order for the scientific method to answer the question it must be about something that you can measure, preferably with a number. Your

    Words: 356  •  Pages: 2
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