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History of Science
Find questions about the origin and important events that led to the development of the different Sciences.
9,329 Questions
Cells are constantly lost from the?
Cells are constantly lost from the body through processes such as shedding of skin cells and cell turnover in tissues. This loss is balanced by the production of new cells through cell division in tissues and organs.
Which countries have strong economies even though they have no oil reserves?
Germany, Japan, and South Korea are examples of countries with strong economies that do not have significant oil reserves. They have diversified economies, strong manufacturing sectors, and a focus on innovation and technology that contribute to their economic success.
Who thought matter was made up of the four elements?
The ancient Greeks, particularly Empedocles, proposed the idea that all matter was made up of four elements: earth, water, air, and fire. This concept influenced early ideas about chemistry and alchemy.
What impact did Nicolaus Copernicus have on the renaissance?
Nicolaus Copernicus had a significant impact on the Renaissance by challenging the geocentric view of the universe with his heliocentric model. His work laid the foundation for modern astronomy and led to a fundamental shift in our understanding of the cosmos. Copernicus's ideas also sparked further scientific inquiry and exploration during the Renaissance period.
How many eruptions has montserrat undergone in the past 200 years?
Montserrat has experienced several volcanic eruptions in the past 200 years. The most notable eruption occurred between 1995 and 1997, which led to the destruction and abandonment of the capital city, Plymouth. Additionally, smaller eruptions have occurred before and after this major event.
What were dangerous animals in the Devonian period?
Some dangerous animals in the Devonian period included jawless fish like Dunkleosteus, which had powerful jaws and sharp teeth for hunting. Other predators included early sharks and large eurypterids (sea scorpions), which were top predators in the ancient oceans.
A tiny invisible molecule that makes up everything on earth theorized by Democritus?
Democritus theorized the existence of atoms, which are tiny, indivisible particles that make up all matter in the universe. He proposed that these atoms are in constant motion and combine in different ways to form different substances. This idea laid the foundation for modern atomic theory.
Yes named as photon. It has momentum though it does not have mass
Its momentum is given by the expression p = h / l
Here h = Planck's constant and l - lambda the wavelength of radiation
What was Lavoisier's discovery about mass not being able to be made or destroyed?
Lavoisier's discovery, known as the law of conservation of mass, states that in a chemical reaction, the total mass of the reactants is equal to the total mass of the products. This implies that mass cannot be created or destroyed in a chemical reaction, but only rearranged.
Tissue in the cortex that can act as a storage area for food and water?
Parenchyma cells in the cortex can act as storage areas for food and water in plants. These cells have large vacuoles that can store nutrients and water for the plant's use. Additionally, some plants have specialized storage tissues like the parenchyma cells in the pith region of stems or in the storage roots of plants like carrots or beets.
What color was the apple that fell on isaac newtons head?
There is no historical record of the color of the apple that fell on Isaac Newton's head. The famous story about Newton's apple and the theory of gravity is a popular myth that has been passed down over the years.
Is John Dalton the father of modern chemistry?
John Dalton is often referred to as the father of modern chemistry for his development of the atomic theory. His work on understanding the nature of chemical elements and compounds laid the foundation for modern chemistry.
How does todays classification of elements compare o that of the ancient Greeks?
Classification of elements by the ancient Greeks: "Seek Knowledge"
"alkhimiaa" of the ancient the Greeks and the Serenades has been of no value and there is no similarity between it and modern chemistry or even scientific thinking whatsoever. The Greeks and Serenades at that time depended on assumptions and analytical thinking. They used emotional views to justify phenomena and miracles, and to explain them. This method is also closely related to magic.
the Greeks had a role in cheestry. They came up with a theory about the possibility of converting cheap metals like iron, copper and mercury into valuable metals like gold and silver. This theory stated that all the substances on earth originated from four main elements: fire, dust, air and water. Each element was said to have two features in common with another element.
For example, fire is dry and hot, dust is dry and cold, water is cold and moist, and air is cold and dry. Based on this assumption, it would be possible to convert one element to another. Aristotle saw that when all the elements reacted in the bellows underneath the earth's surface under a certain amount of pressure and and a specific temperature, metals were produced.
Moreover, in the fifth century B.C, the Greek philosopher Democritus stated that all substances are made of one thing in the form of small unbreakable units, called atoms. Based on this theory the difference between substances is solely due to the difference in the size, shape and position of their atoms.
The Greek philosopher Aristotle, who lived in the fourth century B.C., believed that any of the main elements suggested (by Empedocles) can be converted to any of the other elements by adding or removing heat or humidity. He decided that this change, known as the transformation, occurs whenever an element is added to a chemical reaction or a change in a physical status occur (solid, liquid, gas). Aristotle believed that water, for instance, is transformed from liquid to gas through heating.
Despite the failure of those attempts in the "alkhimiaa" field to transform metal into gold, over the many centuries they spent conducting experiments, researchers of this field did broaden their knowledge of chemical substances. Modern chemists are still using many of the laboratory tools and methodologies that those who worked in "al-khimiaa" invented, such as: cones, filters and balances used to weigh the chemical substances, as well as bowels used to melt metals. They've also learned to prepare different acids and alcohols and make use of them.
Generally speaking, for the ancient Egyptians and Greeks, this profession was dominated by theoretical views and was practiced by priests and magicians whose secrets were only known to themseves. There was a deficiency on the Greek side while the Egyptians excelled in that field; nevertheless, there was only very little evidence found overall.
The word Chemistry comes from the word Chemeia(amount). EX: if we added a certain amount (chemeia) of this substance to another amount of another substance the result will be the following.
The name itself is significant (Chemeia) it relates to the proportions in combining substances.
What are the oldest ancestors of plants?
Probably the green algae, which descended from cyanobacteria. Seaweeds come in three colours, green, brown and red, and each has different photosynthetic mechanisms - not only chlorophyll.
The intertidal zone may have played an important part in the colonization of the land from aquatic plants.
In neutral atoms (with the same number of protons and electrons), the number of protons and electrons equal the atomic number. If our atom has 9 electrons, is neutral, and therefore has 9 protons, it is element #9: Flourine, which has an atomic mass of 19: 9 protons plus 10 neutrons.
When was oil first discovered in Nigeria?
Oil was first discovered in commercial quantities in Nigeria in 1956 in Oloibiri, a small village in the Niger Delta region. This discovery led to the start of Nigeria's oil industry and significantly impacted the country's economy.
What is the Big Bang Theory and what does it attempt to explain?
x x x x
The light distance galaxies shows that clusters of galaxies are all moving away from each other. The universe is big and getting bigger. space itself is expanding.
Imagine filming this expanding universe. If you ran the film backwards. You could see how it all began. the universe once had no size at all. It burst into existence from nothing. It is incredibly hot. This is called big bang theory.:)
the big bang theory explains how the universe was created
The Big Bang is one of the theories on how the Earth was formed.
What is the comparison of dandelion to pollen?
Dandelions are flowering plants that produce pollen as part of their reproductive process. Pollen is a powdery substance containing the male reproductive cells of flowering plants like dandelions. Dandelion pollen can be spread by wind or insects to fertilize other dandelion flowers, leading to seed production.
Depending on the size, it can range from just seawater left wherever the wave reached to total demolition of what it hit, leaving soil and water everywhere, like the results of the March 11 tsunami in Japan.
Koch did investigations in the isolation and identification of various bacterial species. Because of this he laid the foundations of such important and modern sciences like medical microbiology, bacteriology and virology.
What planet was discovered by urbain le verrier and john couch Adams in 1846?
The planet discovered by Urbain Le Verrier and John Couch Adams in 1846 was Neptune. Their calculations independently predicted the existence and location of this new planet, which was later confirmed through observations.
Who invented the carbolic spray?
Joseph Lister (1826-1912) developed a carbolic spray in 1869 to use in operating theatres, thus reducing the number of deaths from infection after successful operations.
Was Robert Hooke the first person to use the word cell in relation to biology?
Yes, Robert Hooke coined the term "cell" in biology when he observed plant cells using a microscope in 1665. His discovery revolutionized our understanding of living organisms and laid the foundation for the field of cell biology.
How do you use a burning rope clock?
To use a burning rope clock, light the rope at one end and as it burns, measure the time it takes for the fire to reach specific markings on the rope. Each marking represents a certain amount of time, allowing you to track the passing hours as the rope burns.
