Let’s learn about sharks | Science News for Students

Let’s learn about sharks | Science News for Students

birds: Heat-blooded animals with wings that first confirmed up throughout the time of the dinosaurs. Birds are jacketed in feathers and produce younger from the eggs they deposit in some kind of nest. Most birds fly, however all through historical past there have been the occasional species that don’t.

carnivore: An animal that both solely or primarily eats different animals.

ecological: An adjective that refers to a department of biology that offers with the relations of organisms to at least one one other and to their bodily environment. A scientist who works on this subject is known as an ecologist.

electrical subject: A area round a charged particle or object inside which a power can be exerted on different charged particles or objects.

electrical energy: A circulate of cost, often from the motion of negatively charged particles, referred to as electrons.

extinct: An adjective that describes a species for which there aren’t any dwelling members.

subject: An space of research, as in: Her subject of analysis was biology. Additionally a time period to explain a real-world atmosphere by which some analysis is performed, corresponding to at sea, in a forest, on a mountaintop or on a metropolis avenue. It’s the reverse of a synthetic setting, corresponding to a analysis laboratory. (in physics) A area in area the place sure bodily results function, corresponding to magnetism (created by a magnetic subject), gravity (by a gravitational subject), mass (by a Higgs subject) or electrical energy (by {an electrical} subject).

fossil: Any preserved stays or traces of historic life. There are lots of various kinds of fossils: The bones and different physique elements of dinosaurs are referred to as “physique fossils.” Issues like footprints are referred to as “hint fossils.” Even specimens of dinosaur poop are fossils. The method of forming fossils is known as fossilization.

gel: A gooey or viscous materials that may circulate like a thick liquid.

Nice Dying: A time frame roughly 252 million years in the past when not less than 70 p.c of all land species and 96 p.c of ocean species went extinct. Ot was the best mass extinction in Earth’s historical past. These species fell sufferer to altering local weather and ecological modifications.

liver: An organ of the physique of animals with backbones that performs various necessary features. It could actually retailer fats and sugar as vitality, break down dangerous substances for excretion by the physique, and secrete bile, a greenish fluid launched into the intestine, the place it helps digest fat and neutralize acids.

megalodon: An extinct shark species, Carcharocles megalodon, that lived between the early Miocene (an epoch which began some 23 million years in the past) and the top of the Pliocene (roughly 2.6 million years in the past). Most scientists consider it was the most important fish to ever reside. Its identify comes from the Greek and means gigantic tooth. The typical grownup member of this species might have spanned greater than 10 meters (33 ft) and weighed 30 metric tons (66,000 kilos) or extra.

migratory: An adjective for species that journey lengthy distances every year, alongside pretty common paths, to to seek out meals or extra hospitable situations (corresponding to higher climate). Such travels are referred to as migrations.

area of interest: A small or slim pocket that units one thing aside, or maybe affords a area of safety. (In ecology) The time period for the function that an organism performs in its neighborhood.

plankton: A small organism that drifts or floats within the sea. Relying on the species, plankton vary from microscopic sizes to organisms concerning the measurement of a flea. Some are tiny animals. Others are plantlike organisms. Though particular person plankton are very small, they type large colonies, numbering within the billions. The most important animal on the planet, the blue whale, lives on plankton.

inhabitants: (in biology) A bunch of people from the identical species that lives in the identical space.

pore: A tiny gap in a floor. On the pores and skin, substances corresponding to oil, water and sweat move by these openings.

predator: (adjective: predatory) A creature that preys on different animals for many or all of its meals.

prey: (n.) Animal species eaten by others. (v.) To assault and eat one other species.

sensor: (in biology) The construction that an organism makes use of to sense attributes of its atmosphere, corresponding to warmth, winds, chemical compounds, moisture, trauma or an assault by predators.

sharks: A household of primitive fishes that depend on skeletons fashioned of cartilage, not bone. Like skates and rays, they belong to a gaggle referred to as elasmobranchs. Then are likely to develop and mature slowly and have few younger. Some lay eggs, others give delivery to reside younger.

species: A bunch of comparable organisms able to producing offspring that may survive and reproduce.

whale: A standard, however pretty imprecise, time period for a category of huge mammals that lives within the ocean. This group consists of dolphins and porpoises.


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