Sublimation is a process in which a solid turns directly into a gas without passing through the liquid state. It occurs when the particles of a solid absorb enough energy to break the bonds between them and enter the gas phase, bypassing the liquid phase entirely. Example :Naphthalene,iodine
When a substance is heated, its state changes. For example, when water is heated, it changes from a liquid to a gas (water vapour). As the temperature increases, the molecules of the substance gain more energy and move faster and faster. Eventually, the molecules move so quickly that they escape the attraction of the other …
Solids: Particles in a solid are packed together very tightly in a repeating pattern. Liquids: Particles in a liquid are packed together somewhat loosely and can move around each other. Gases: Particles in a gas are spread out and move around freely.
Yes, sugar (sucrose) can dissolve in water. When sugar is added to a glass of water, it will dissolve into the water molecules, forming a homogenous solution. The process is called “dissolving” and it happens because the molecules of the sugar are attracted to the molecules of the water. The molecules of the sugar are …
Solid : Mass, Volume, Fixed Liquid : Mass, Volume, Fluid Gas : Mass, Volume, Fluid
Would the reckless interference of intelligent human beings destroy the continuity of life on earth? Yes, reckless interference from intelligent human beings can and has had a devastating effect on life on Earth. Human activities such as deforestation, industrial pollution, and over-fishing have had a dramatic effect on the environment and biodiversity around the world. …
What are the features of modern man that differentiate him from other organisms included in the historical path of human evolution? Bipedalism: The ability to stand and walk upright on two feet is the defining feature of modern man and is a major factor in how our species has evolved. Larger Brain Size: Modern humans …
Homo sapiens is an extinct species of bipedal hominin of the genus Homo. The species is believed to have first evolved in Africa about 200,000 years ago and is the only extant species of its genus. Homo sapiens is characterized by its larger brain size and its ability to make and use complex tools, as …
Homo neanderthalensis, also known as Neanderthals, were a species of archaic human that lived in Eurasia during the Middle and Upper Paleolithic period. They are believed to have descended from Homo heidelbergensis and are the closest extinct relatives of Homo sapiens, the modern human species. Neanderthals are generally thought to have had a range of …
Homo erectus is an extinct species of the human genus which lived from about 1.9 million to 135,000 years ago. It is one of the earliest known species of the genus Homo. Homo erectus was the first human ancestor to have a larger brain than its predecessors, and was the first to migrate out of …