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Helium Definition Helium is a very lightweight, colorless, odorless element in the noble gas group. It is used as a component of artificial atmospheres and…

Calculating the Perimeter of a Parallelogram Perimeter of parallelogram means the total distance around the outside of a parallelogram. The perimeter of a parallelogram is…

Shoulder Girdle Definition Shoulder Girdle or pectoral girdle is the bony ring, incomplete behind, which serves for the attachment and support of the upper limbs.…

Psychotherapy Definition Psychotherapy is the treatment of mental and emotional disorders through the use of psychological techniques designed to encourage communication of conflicts and insight…

Rib Cage Definition Rib cage is the bony structure in the chest formed by the ribs and sternum (breastbone) that encloses and protects the heart…

About Carbon Definition Carbon is a naturally abundant, nonmetallic element that occurs in all organic compounds and can be found in all known forms of…

Health Geography Definition Health geography is the study of the distribution, diffusion, determinants, and delivery associated with health and health systems in human populations. It…

Calculating the Circumference of a Circle A circle is a shape with all points the same distance from the center. The distance around a circle…

Fossil Fuel Definition Fossil fuel is a hydrocarbon deposit, such as petroleum, coal, or natural gas, derived from the accumulated remains of ancient plants and…

About Petroleum Definition Petroleum is a thick, flammable, yellow-to-black mixture of gaseous, liquid, and solid hydrocarbons that occurs naturally beneath the Earth’s surface. Primary source…

Sulfur Definition Sulfur is a pale-yellow, brittle nonmetallic element that occurs widely in nature, especially in volcanic deposits, minerals, natural gas, and petroleum. It is…

About Neutron Definition Neutron is an electrically neutral subatomic particle in the baryon family, having a mass of 1.674 × 10-24 grams (1,838 times that…