adolescent: Somebody in that transitional stage of bodily and psychological growth that begins on the onset of puberty, sometimes between the ages of 11 and 13, and ends with maturity.
astronaut: Somebody skilled to journey into house for analysis and exploration.
calorie: The quantity of vitality wanted to boost the temperature of 1 gram of water by 1 diploma Celsius. It’s sometimes used as a measurement of the vitality contained in some outlined quantity of meals. The exception: when referring to the vitality in meals, the conference is to name a kilocalorie, or 1,000 of those energy, a “calorie.” Right here, a meals calorie is the quantity of vitality wanted to boost 1 kilogram of water 1 diploma C.
chemical: A substance shaped from two or extra 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 formulation is H2O. Chemical additionally may be an adjective to explain properties of supplies which are the results of numerous reactions between completely different compounds.
despair: A low spot, akin to in a subject or the floor of a rock. (in medication) A psychological sickness characterised by persistent disappointment and apathy. Though these emotions may be triggered by occasions, such because the demise of a beloved one or the transfer to a brand new metropolis, that isn’t sometimes thought-about an “sickness” — except the signs are extended and hurt a person’s capacity to carry out regular each day duties (akin to working, sleeping or interacting with others). Individuals affected by despair typically really feel they lack the vitality wanted to get something carried out. They could have problem concentrating on issues or exhibiting an curiosity in regular occasions. Many occasions, these emotions appear to be triggered by nothing; they’ll seem out of nowhere.
intestine: An off-the-cuff time period for the gastrointestinal tract, particularly the intestines.
coronary heart charge: Coronary heart beat; the variety of occasions per minute that the center — a pump — contracts, shifting blood all through the physique.
lizard: A sort of reptile that sometimes walks on 4 legs, has a scaly physique and an extended tapering tail. In contrast to most reptiles, lizards additionally sometimes have movable eyelids. Examples of lizards embrace the tuatara, chameleons, Komodo dragon, and Gila monster.
microbe: Brief for microorganism. A residing factor that’s too small to see with the unaided eye, together with micro organism, some fungi and plenty of different organisms akin to amoebas. Most encompass a single cell.
muscle: A sort of tissue used to supply motion by contracting its cells, referred to as muscle fibers. Muscle is wealthy in protein, which is why predatory species search prey containing a lot of this tissue.
oxygen: A gasoline that makes up about 21 % of Earth’s ambiance. All animals and plenty of microorganisms want oxygen to gasoline their development (and metabolism).
bodily: (adj.) A time period for issues that exist in the actual world, versus in recollections or the creativeness. It might additionally seek advice from properties of supplies which are as a consequence of their measurement and non-chemical interactions (akin to when one block slams with power into one other).
respiration: (in cells) The method by which organisms produce vitality from sugars, often by taking in oxygen and releasing carbon dioxide. (in physiology) One full inhalation and exhalation cycle, which transfers oxygen from exterior the physique to inside cells, and the discharge of carbon dioxide from inside these cells to the surface world.
tween: A toddler simply approaching his or her teenage years. Tween is a time period often used for 11- to 12-years olds.