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Scientists
This category is for questions about the people who apply the scientific method to solve problems, introduce new concepts, and strive to explain the natural world.
9,527 Questions
Where do scientists obtain ice cores from?
Scientists obtain ice cores from regions with large ice sheets or glaciers, such as Antarctica, Greenland, and mountainous regions. They drill deep into the ice to collect cylindrical samples that can provide information about past climates, atmospheric composition, and environmental conditions.
What scientific concept did Marie curie develop?
Marie Curie developed the concept of radioactivity, which refers to the spontaneous emission of radiation from unstable atomic nuclei. She discovered the elements polonium and radium, which were foundational to the field of nuclear chemistry and physics. Curie's groundbreaking work in radioactivity earned her two Nobel Prizes in Physics and Chemistry.
What is the main criterion by which scientist judge the usefulness of a model?
The usefulness of a model is based on the models ability to explain a set of facts. In light of new evidence and new facts within the models reported domain, if it can continue to explain these new facts, its robustness lends even more to its 'usefulness'.
When did Alexander Fleming live and where did he live?
Sir Alexander Fleming was born at Lochfield near Darvel in Ayrshire, Scotland on August 6th, 1881. He did in March 11th, 1955 living in London.
Why did Alexander Fleming invent penisilin?
Rosalia invented penisilin!!!!!!!
nobody invented penicillin, it was discovered by Alexander Fleming growing in a petri dish when he noticed that it killed bacteria growing in the dish.
What is a disciplinary studies?
Disciplinary studies involve the exploration of a specific subject or academic field in depth. It typically requires a focused approach to gaining knowledge and understanding within that discipline. This can involve conducting research, critical analysis, and engaging with established theories and methodologies within the field.
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Why Rutherford's and bohr model of atom were rejected?
Rutherford's model has a centralized nucleus that contains protons and neutrons with orbiting electrons. This is wrong because the electrons are shown in stable orbits and they actually exist in probability clouds.
What do scientist believe is in the middle of Saturn?
The outer layer of Saturn is primarily composed of molecular hydrogen. This changes as you go inward as pressure increases. As you venture deeper where the pressure reaches 100,000 bars, the gas starts to resemble a hot liquid. When the hydrogen reaches a pressure of 1,000,000 bar, hydrogen changes into a new state of metallic hydrogen. In this state it resembles a molten metal. This metalic hydrogen state occurs at about half of Saturn's radius. Below this is a layer dominated by ice where "ice" denotes a soupy liquid mixture of water, methane, and ammonia under high temperatures and pressures. Finally at the center is a rocky or rocky-ice core.
For what do scientists use the data from a controlled experiment?
Whenever possible, a hypothesis should be tested by an experiment in which only one variable is changed at a time. All other variables should be kept untouched and unchanged. Scientists use the data from a controlled experiment to explain the steps and outcomes that produced their final product.
How is the strength of an earthquake measured?
The strength of an earthquake is typically measured using the moment magnitude scale (Mw), which takes into account the seismic energy released by the earthquake. This scale provides a single number that represents the overall size of the earthquake. Another commonly used scale is the Richter scale, which measures the amplitude of seismic waves.
Did Bohr improved upon Dalton's atomic theory?
Yes, Bohr's atomic theory built upon Dalton's atomic theory by introducing the concept of energy levels and electrons moving in specific orbits around the nucleus. He also added the idea of quantized electronic transitions, which helped explain the spectral lines observed in atomic spectra.
What are scientists concerned with the maintenance of health called?
Scientists concerned with the maintenance of health are called healthcare professionals or healthcare scientists. They include doctors, nurses, pharmacists, public health professionals, and researchers working in the health and medical field.
Does the word pasteurise come from the man loise pasteur?
Yes, the term "pasteurize" is named after Louis Pasteur, a French scientist known for developing the process of pasteurization in the 19th century. This process involves heating liquids to a specific temperature to kill harmful bacteria and prolong the shelf-life of the product.
What scientists use to classify organism?
Scientists use various characteristics such as genetic similarities, physical appearance, behavior, and evolutionary relationships to classify organisms into different groups. This classification system is known as taxonomy and helps scientists understand the diversity and relationships among different species. The main levels of classification are domain, kingdom, phylum, class, order, family, genus, and species.
Sir Alexander Fleming was born at Lochfield near Darvel in Ayrshire, Scotland on August 6th, 1881. He attended Louden Moor School, Darvel School, and Kilmarnock Academy before moving to London where he attended the Polytechnic. He spent four years in a shipping office before entering St. Mary's Medical School, London University. He qualified with distinction in 1906 and began research at St. Mary's under Sir Almroth Wright, a pioneer in vaccine therapy. He gained M.B., B.S., (London), with Gold Medal in 1908, and became a lecturer at St. Mary's until 1914. He served throughout World War I as a captain in the Army Medical Corps, being mentioned in dispatches, and in 1918 he returned to St.Mary's. He was elected Professor of the School in 1928 and Emeritus Professor of Bacteriology, University of London in 1948. He was elected Fellow of the Royal Society in 1943 and knighted in 1944.
Early in his medical life, Fleming became interested in the natural bacterial action of the blood and in antiseptics. He was able to continue his studies throughout his military career and on demobilization he settled to work on antibacterial substances which would not be toxic to animal tissues. In 1921, he discovered in «tissues and secretions» an important bacteriolytic substance which he named Lysozyme. About this time, he devised sensitivity titration methods and assays in human blood and other body fluids, which he subsequently used for the titration of penicillin. In 1928, while working on influenza virus, he observed that mould had developed accidently on a staphylococcus culture plate and that the mould had created a bacteria-free circle around itself. He was inspired to further experiment and he found that a mould culture prevented growth of staphylococci, even when diluted 800 times. He named the active substance penicillin.
Sir Alexander wrote numerous papers on bacteriology, immunology and chemotherapy, including original descriptions of lysozyme and penicillin. They have been published in medical and scientific journals.
Fleming, a Fellow of the Royal College of Surgeons (England), 1909, and a Fellow of the Royal College of Physicians (London), 1944, has gained many awards. They include Hunterian Professor (1919), Arris and Gale Lecturer (1929) and Honorary Gold Medal (1946) of the Royal College of Surgeons; Williams Julius Mickle Fellowship, University of London (1942); Charles Mickle Fellowship, University of Toronto (1944); John Scott Medal, City Guild of Philadelphia (1944); Cameron Prize, University of Edinburgh (1945); Moxon Medal, Royal College of Physicians (1945); Cutter Lecturer, Harvard University (1945); Albert Gold Medal, Royal Society of Arts (1946); Gold Medal, Royal Society of Medicine (1947); Medal for Merit, U.S.A. (1947); and the Grand Cross of Alphonse X the Wise, Spain (1948).
He served as President of the Society for General Microbiology, he was a Member of the Pontifical Academy of Science and Honorary Member of almost all the medical and scientific societies of the world. He was Rector of Edinburgh University during 1951-1954, Freeman of many boroughs and cities and Honorary Chief Doy-gei-tau of the Kiowa tribe. He was also awarded doctorate, honoris causa, degrees of almost thirty European and American Universities.
In 1915, Fleming married Sarah Marion McElroy of Killala, Ireland, who died in 1949. Their son is a general medical practitioner.
Fleming married again in 1953, his bride was Dr. Amalia Koutsouri-Voureka, a Greek colleague at St. Mary's.
In his younger days he was a keen member of the Territorial Army and he served from 1900 to 1914 as a private in the London Scottish Regiment.
Dr Fleming died on March 11th in 1955 and is buried in St. Paul's Cathedral.
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What are the famous discoveries of Mario J. Molina?
Mario J. Molina is best known for his research on the effects of chlorofluorocarbons (CFCs) on the ozone layer, leading to the discovery of the Antarctic ozone hole. His work contributed to the development of the Montreal Protocol, an international treaty aimed at phasing out the production of ozone-depleting substances. Molina's research highlighted the importance of environmental protection and sustainable practices in addressing global issues.
Why do forensic scientists use microscopes?
Forensic scientists use microscopes to examine trace evidence such as hair, fiber, glass, or soil found at crime scenes. Microscopes help scientists identify and compare the physical characteristics of different samples to determine their origin and potentially link them to suspects or victims. This detailed analysis can provide valuable information in criminal investigations.
What controversy did Galileos work cause?
Galileo's work caused controversy because it challenged the accepted geocentric model of the universe, which placed Earth at the center. His support for the heliocentric model, with the sun at the center, contradicted religious teachings of the time. This led to conflicts with the Catholic Church and Galileo being condemned for heresy.
How big was Dian Fossey's diary?
Dian Fossey's diary contained thousands of pages documenting her observations and experiences with gorillas in Rwanda. The diary chronicled her research and interactions with the animals over many years and provided a valuable insight into their behavior and social structures.
Why are discoveries important to scientists?
Discoveries are important to scientists because they contribute new knowledge, advance understanding in their field, and drive innovation. Discoveries can lead to new research opportunities, the development of technology, and the improvement of scientific theories. They also inspire scientists to ask new questions and continue exploring the unknown.
The life of Alexander Fleming?
Alexander Fleming was a Scottish bacteriologist who discovered the first antibiotic, penicillin, in 1928. This discovery revolutionized medicine and saved countless lives. Fleming was awarded the Nobel Prize in Physiology or Medicine in 1945 for his groundbreaking work.
Why is it important to communicate your results?
Communicating results is important to share findings with others in the field, contribute to the scientific community, and potentially inspire further research or applications based on your work. It also allows for feedback on methodology and results, ensuring the reliability and validity of your study.
