Disgust

Disgust is an emotion that is typically associated with things that are perceived as unclean, inedible, or infectious. In The Expression of the Emotions in Man and Animals, Charles Darwin wrote that disgust refers to something revolting. Primarily in relation to the sense of taste, as actually perceived or vividly imagined; and secondarily to anything which causes a similar feeling, through the sense of smell, touch, and even of eyesight. Disgust is one of the basic emotions of Robert Plutchik's theory of emotions. Disgust invokes a characteristic facial expression, one of Paul Ekman's six universal facial expressions of emotion.
Disgust may be further subdivided into physical disgust, associated with physical or metaphorical uncleanness, and moral disgust, a similar feeling related to courses of action.

Sadness

In everyday language depression refers to any downturn in mood, which may be relatively transitory and perhaps due to something trivial. This is differentiated from Clinical depression which is marked by symptoms that last two weeks or more and are so severe that they interfere with daily living.
In the field of psychiatry the word depression can also have this meaning but more specifically refers to a mental illness when it has reached a severity and duration to warrant a diagnosis. The Diagnostic and Statistical Manual of Mental Disorders (DSM) states that a depressed mood is often reported as being: "... depressed, sad, hopeless, discouraged, or 'down in the dumps'."
In a clinical setting, a depressed mood can be something a patient reports (a symptom), or something a clinician observes (a sign), or both.

Fear

Fear is an emotional response to impending danger that is tied to anxiety. Most fear is usually connected to pain (i.e., some fear heights because if they fall, when they land, they will be in great pain). Behavioral theorists, like Watson and Ekman, have both suggested that fear is one of several very basic emotions (e.g., joy and anger). Fear is a survival mechanism, and usually occurs in response to a specific negative stimulus.

Intelligence

For other uses, see Intelligence (disambiguation).
Intelligence is a property of mind that encompasses many related abilities, such as the capacities to reason, to plan, to solve problems, to think abstractly, to comprehend ideas, to use language, and to learn. There are several ways to define intelligence. In some cases, intelligence may include traits such as: creativity, personality, character, knowledge, or wisdom. However, some psychologists prefer not to include these traits in the definition of intelligence.

"Intelligence is what you use when you don't know what to do."

Ramez Khaled

Stupidity

Stupid" redirects here. For other uses, see Stupid (disambiguation).
Stupidity is the quality or condition of lacking intelligence, as opposed to being merely ignorant or uneducated. This quality can be attributed to both an individual or a person's actions, words or beliefs, or those of a group.
As an English word, it implies that the attributed party is not mentally retarded but rather is willfully ignorant and/or unintelligent, and displays poor use of judgement or insensitivity to nuances.
The adjective is also used as a general pejorative (e.g. I didn't borrow your stupid cap - go look for it yourself).

Food Web & Chain

Food chains, food webs and/or food networks describe the feeding relationships between species to another within an ecosystem. Organisms are connected to the organisms they consume by arrows representing the direction of biomass transfer. Typically a food chain or food web refers to a graph where only connections are recorded, and a food network or ecosystem network refers to a network where the connections are given weights representing the quantity of nutrients or energy being transferred.

Etymology

The word science comes through the Old French, and is derived from the Latin word scientia for knowledge, which in turn comes from scio, "I know". The Proto-Indo-European (PIE) root that yields scio is *skei-, and it means "cut, separate, or discern". Other words from the same root include Sanskrit chyati, "he cuts off", Greek schizo, "I split" (hence English schism, schizophrenia), Latin scindo, "I split" (hence English rescind).[7] From the Middle Ages to the Enlightenment, science or scientia meant any systematic recorded knowledge.[8] Science therefore had the same sort of very broad meaning that philosophy had at that time. In other languages, including French, Spanish, Portuguese, and Italian, the word corresponding to science also carries this meaning.
From classical times until the advent of the modern era, "philosophy" was roughly divided into natural philosophy and moral philosophy. In the 1800s, the term natural philosophy gradually gave way to the term natural science. Natural science was gradually specialized to its current domain, which typically includes the physical sciences and biological sciences. The social sciences, inheriting portions of the realm of moral philosophy, are currently also included under the auspices of science to the extent that these disciplines use empirical methods. As currently understood, moral philosophy still retains the study of ethics, regarded as a branch of philosophy.
Today, the primary meaning of "science" is generally limited to empirical science involving use of the scientific method.[9] Examples of the broader use include political science and computer science, which are named according to an older and more general use of the word "science".