astrobiologist: A person who scientific studies lifetime in all places in the universe, which includes on Earth and in area.

astronaut: An individual skilled to vacation into room for exploration and exploration.

germs: (singular: bacterium) Solitary-celled organisms. These dwell virtually in all places on Earth, from the base of the sea to inside of other residing organisms (these types of as vegetation and animals). Bacteria are a person of the three domains of daily life on Earth.

cell: The smallest structural and useful device of an organism. Generally as well little to see with the unaided eye, it is made up of a watery fluid surrounded by a membrane or wall. Relying on their dimension, animals are created of everywhere from countless numbers to trillions of cells. Most organisms, this sort of as yeasts, molds, microorganisms and some algae, are composed of only a person cell.

cell membrane: A construction that separates the inside of a mobile from the outdoors of it. Some particles are permitted to pass by way of the membrane.

colleague: Another person who operates with one more a co-employee or crew member.

degrade: To crack down into scaled-down, less difficult elements — as when wood rots or as a flag that is left outside in the temperature will fray, fade and drop apart. (in chemistry) To split down a compound into smaller elements.

dessication: A phrase for the condition of remaining very dry, in which all moisture has been taken off (deliberately or via purely natural procedures).

DNA: (brief for deoxyribonucleic acid) A very long, double-stranded and spiral-shaped molecule inside of most living cells that carries genetic guidelines. It is created on a backbone of phosphorus, oxygen, and carbon atoms. In all dwelling things, from vegetation and animals to microbes, these directions notify cells which molecules to make.

atmosphere: The sum of all of the factors that exist all around some organism or the course of action and the ailment these matters build. Surroundings may well refer to the climate and ecosystem in which some animal lives, or, possibly, the temperature and humidity (or even the placement of points in the vicinity of an item of interest).

industry: (in physics) A location in room where specific actual physical results function, this sort of as magnetism (produced by a magnetic industry), gravity (by a gravitational discipline), mass (by a Higgs field) or electrical energy (by an electrical subject).

genetic: Owning to do with chromosomes, DNA and the genes contained inside of DNA. The field of science dealing with these biological directions is acknowledged as genetics. Persons who get the job done in this subject are geneticists.

Intercontinental Room Station: An synthetic satellite that orbits Earth. Operate by the United States and Russia, this station supplies a investigate laboratory from which researchers can perform experiments in biology, physics and astronomy — and make observations of Earth.

Mars: The fourth planet from the sunlight, just just one world out from Earth. Like Earth, it has seasons and humidity. But its diameter is only about fifty percent as big as Earth’s.

membrane: A barrier which blocks the passage (or stream through) of some elements based on their dimensions or other features. Membranes are an integral section of filtration methods. A lot of provide that similar purpose as the outer covering of cells or organs of a system.

meteor: (adj. meteoritic) A lump of rock or metallic from area that hits the atmosphere of Earth. In place it is recognized as a meteoroid. When you see it in the sky it is a meteor. And when it hits the floor it is named a meteorite.

meteorite: A lump of rock or metallic from place that passes via Earth’s environment and collides with the floor.

microbe: Brief for microorganism. A dwelling issue that is also compact to see with the unaided eye, which include germs, some fungi and quite a few other organisms this kind of as amoebas. Most consist of a solitary mobile.

microbiology: The study of microorganisms, principally bacteria, fungi and viruses. Researchers who analyze microbes and the bacterial infections they can cause or techniques that they can interact with their atmosphere are acknowledged as microbiologists.

NASA: Shorter for the Countrywide Aeronautics and Space Administration. Made in 1958, this U.S. company has turn out to be a leader in space exploration and in stimulating general public interest in room exploration. It was through NASA that the United States sent men and women into orbit and finally to the moon. It also has despatched research craft to research planets and other celestial objects in our photo voltaic procedure.

panspermia: A concept that lifestyle on Earth progressed from microbes or from chemical creating blocks of uncomplicated daily life that rained down on to the planet from outer house.

earth: A huge celestial item that orbits a star but contrary to a star does not make any noticeable light-weight.

pressure: Power utilized uniformly around a area, measured as pressure for each device of region.

radiation: (in physics) A single of the three big means that electricity is transferred. (The other two are conduction and convection.) In radiation, electromagnetic waves carry power from a single place to an additional. Compared with conduction and convection, which have to have content to help transfer the vitality, radiation can transfer energy across vacant room.

stratosphere: The 2nd layer of the Earth’s ambiance, just earlier mentioned the troposphere, or floor layer. The stratosphere stretches from 10 kilometers to 50 kilometers (about 6.2 to 31 miles) higher than sea amount.

ultraviolet: A portion of the gentle spectrum that is close to violet but invisible to the human eye.

universe: The full cosmos: All points that exist through house and time. It has been growing because its development through an party regarded as the Big Bang, some 13.8 billion decades ago (give or just take a few hundred million decades).

void: An vacant area or cavity.