adolescent: Someone in that transitional stage of bodily and psychological improvement that begins on the onset of puberty, sometimes between the ages of 11 and 13, and ends with maturity.
astronaut: Someone educated to journey into the area for analysis and exploration.
calorie: The quantity of power wanted to boost the temperature of 1 gram of water by 1 diploma Celsius. It is usually used as a measurement of the power contained in some outlined quantity of meals. The exception: when referring to the power in meals, the conference is to name a kilocalorie, or 1,000 of that energy, a “calorie.” Here, a meal’s calorie is the quantity of power wanted to boost 1 kilogram of water 1 diploma C.
chemical: A substance fashioned from two or more atoms that unite (bond) in a set proportion and construction. For instance, water is a chemical made when two hydrogen atoms bond to at least one oxygen atom. Its chemical method is H2O. Chemicals additionally may be an adjective to explain properties of supplies which can be the results of varied reactions between totally different compounds.
melancholy: A low spot, comparable to in a discipline or the floor of rock. (in medication) A psychological sickness characterized by persistent unhappiness and apathy. Although these emotions may be triggered by occasions, such because the dying of a cherished one or the transfer to a brand new metropolis, that isn’t sometimes thought of an “illness” — until the signs are extended and hurt a person’s capacity to carry out regular everyday duties (comparable to working, sleeping or interacting with others). People affected by melancholy usually really feel they lack the power wanted to get something finished. They could have issues concentrating on issues or exhibiting curiosity on regular occasions. In many instances, these emotions appear to be triggered by nothing; they’ll seem out of nowhere.
intestine: An casual time period for the gastrointestinal tract, particularly the intestines.
coronary heart fee: Heartbeat; the variety of instances per minute that the guts — a pump — contracts, transferring blood all through the physique.
lizard: A sort of reptile that sometimes walks on 4 legs, has a scaly physique, and a protracted tapering tail. Unlike most reptiles, lizards additionally sometimes have movable eyelids. Examples of lizards embrace the tuatara, chameleons, Komodo dragon, and Gila monster.
microbe: Short for microorganisms. A residing factor that’s too small to see with the unaided eye, together with micro organism, some fungi, and lots of different organisms comparable to amoebas. Most encompass a single cell.
muscle: A sort of tissue used to provide motion by contracting its cells, generally known as muscle fibers. Muscle is wealthy in protein, which is why predatory species search for prey containing numerous this tissue.
oxygen: A fuel that makes up about 21 % of Earth’s environment. All animals and lots of microorganisms want oxygen to gasoline their progress (and metabolism).
bodily: (adj.) A time period for issues that exist in the true world, versus in recollections or the creativeness. It may also discuss with properties of supplies which can be as a result of their measurement and non-chemical interactions (comparable to when one block slams with pressure into one other).
respiration: (in cells) The course by which organisms produce power from sugars, often by taking in oxygen and releasing carbon dioxide. (in physiology) One full inhalation and exhalation cycle, which transfers oxygen from outdoors the physique to inside cells, and the discharge of carbon dioxide from inside these cells to the skin world.
tween: A toddler simply approaching his or her teenage years. Tween is a time period often used for 11- to 12-years olds.