Britannica's new platform provides content designed and written specifically for early learners. black hole n. 1. Genetic studies in the late 20th century refuted the existence of biogenetically distinct races, and scholars now argue that 'races' are cultural interventions stemming from colonialism. All our papers are . White light is a mixture of all wavelengths of the visible spectrum, occurring both naturally and artificially. Science is the pursuit and application of knowledge and understanding of the natural and social world following a systematic methodology based on evidence. Black hole, cosmic body of extremely intense gravity from which nothing, not even light, can escape. Our journals are essential to fulfilling the AAAS mission to 'advance science, engineering, and innovation throughout the world for the benefit of all people.' In the philosophy of science, a theory is falsifiable (or refutable) if it is contradicted by an observation statement that has a conventional empirical interpretation, i.e., is potentially observable with existing technologies.For example, "All swans are white" is falsifiable, because "Here is a black swan" contradicts it and this is observable. The science which deals with the study of living organisms is known as biology. FOLDOC is a computing dictionary. Black person synonyms, Black person pronunciation, Black person translation, English dictionary definition of Black person. See event recorder. Black science fiction or black speculative fiction is an umbrella term that covers a variety of activities within the science fiction, fantasy, and horror genres where people of the African diaspora take part or are depicted. Black Soils definition endorsed by the 11th Working Session of the Intergovernmental Technical Panel on Soils (21/11/2019, FAO HQ) Noun 1. For the Greater Good Science Center, "diversity" refers to both an obvious fact of human life—namely, that there are many different kinds of people—and the idea that this diversity drives cultural, economic, and social vitality and innovation.

AAAS [acronym] American Association for the Advancement of Science, pronounced "Triple-A ess." Appears in modules: The How and Why of Scientific Meetings; abiogenesis [noun] The emergence of life forms emerging from non-living chemical systems. Know more on Glossary of Biology Terms and Definitions.

Humanity doesn't start at 20 weeks: Lila Rose. The rest - everything on Earth, everything ever observed with all of our instruments, all normal matter adds up to less than 5 . Blackwater definition, any of several human or animal diseases characterized by the production of dark urine as a result of the rapid breakdown of red blood cells. Beyond a certain region, not even light can escape the powerful tug of a black hole's gravity. Black Lives Matter, social movement dedicated to fighting racism and police brutality against Black people. What is dark energy? Scientific methodology includes the following: Objective observation: Measurement and data (possibly although not necessarily using mathematics as a tool) . These air masses are . I am a student This bizarre armored dinosaur had a uniquely . Series. The psychological biases that blind people, both individually and collectively, to uncertainty and a rare event's massive role in historical affairs. . any of the branches of natural or physical science. It includes definitions of acronyms, jargon , programming languages , tools , architecture , operating systems , networking , theory , standards , mathematics , telecoms , electronics , institutions and companies , projects , history, in fact any of the vocabulary you might expect to find in a computer dictionary. More is unknown than is known — we know how much there is, and we know some of its properties; other than that, dark energy is a mystery — but an important one. Creating a more engaging and fun learning experience for students, the activities in Britannica Fundamentals align with the content areas children learn in the classroom. It refers to world views, beliefs, and common sense ideas that are rooted in racial stereotypes and biases. It is an achromatic color, without hue, like white and gray. American . relating to or noting the descendants of these populations, without regard for the lightness or darkness of skin tone. That's why black holes appear black.
A great void; an abyss: The government created a bureaucratic black hole that swallows up individual initiative. The simplest definition of a black hole is an object that is so dense that not even light can escape its surface. It is derived from the Greek word bios meaning 'life' and logia that means 'study of'. This is a component of the recognition that scientific knowledge is empirically based (Hoffman & Torrence 1993). 2. Black is a color which results from the absence or complete absorption of visible light. Indeed, decades of research suggest that intolerance hurts our well-being—and that individuals thrive when they are able to tolerate and . Black History Month provides teachers with an opportunity to feature the stories and voices of black scientists, engineers and mathematicians in the context of their science instruction. The energy that held the star together disappears and it collapses in on itself producing a magnificent explosion. AAAS, an international nonprofit scientific association established in 1849, publishes: Science, Science Advances, Science Immunology, Science Robotics, Science Signaling and Science Translational Medicine. Emotion researchers generally define empathy as the ability to sense other people's emotions, coupled with the ability to imagine what someone else might be thinking or feeling. The gravity is so strong because matter has been squeezed into a tiny space. A black hole is a place in space where gravity pulls so much that even light can not get out. The thing to which the term color is applied does not necessarily have to possess the character imputed to it. If the star has enough mass, it will collapse on itself down to a very small size. Contemporary researchers often differentiate between two types of empathy: "Affective empathy" refers to the sensations and feelings we get . hypothesis. The period of recurring plague . See also: Black science fiction and Speculative fiction by writers of color For other uses, see Futurism (disambiguation). Black holes form at the end of some stars' lives. In contrast with spontaneous generation, abiogenesis is not a process that biologists think continues in a particular environment, such as a planet or . mainstream definition of "black." Politically speaking, contemporary stereotypical definitions of "black" as a racial category do the ideological work of supporting the exclusion of Black students from, and marginalization within, elite higher educational spaces. The meaning of biology is a branch of knowledge that deals with living organisms and vital processes. Black swan events are typically random and . The Black Death swept through the Middle East and Europe in the years 1346-1353 but it may have begun several decades earlier in the Qinghai Plateau of Central Asia. relating or belonging to any of the various human populations characterized by dark skin pigmentation, specifically the dark-skinned peoples of Africa, Oceania, and Australia. See more. Wastewater containing bodily or other biological wastes, as from toilets, dishwashers, or kitchen drains, and kept separate from graywater in wastewater recycling systems. It has a long, rich history. The super black coating is the darkest substance man has ever synthesized - it's called Vantablack. 2.
• Black Hole Black hole is an area in space that has a very powerful gravitational field. : being or containing a warning of a serious or life-threatening side effect (such as stroke or muscle damage) that is highlighted by a black border on a prescription drug's label or accompanying literature Examples of black box in a Sentence The meaning of blackout is a turning off of the stage lighting to separate scenes in a play or end a play or skit; also : a skit that ends with a blackout. This active supermassive black hole, or quasar, boasts a mass of 1.6 billion suns and lies at the heart of a galaxy .

The constituents of a solid tend to be packed together much closer than the particles in a gas or liquid.The reason a solid has a rigid shape is that the atoms or molecules are tightly connected via chemical bonds.

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