atom: The basic unit of a chemical element. An atom consists of a dense nucleus containing positively charged protons and uncharged neutrons. A cloud of negatively charged electrons orbits the nucleus.
boron: A chemical element with atomic number 5. Its scientific symbol is B.
Chemicals: A substance formed by the combination of two or more atoms in a certain ratio and structure. For example, water is a chemical formed by two hydrogen atoms combining with one oxygen atom. Its chemical formula is H.2O. Chemical can also be used as an adjective to describe the properties of substances that result from various reactions between different compounds.
Chemical: The branch of science that deals with the composition, structure, properties, and interactions of matter. Scientists use this knowledge to study unknown substances, to reproduce useful substances in large quantities, and to design and create new, useful substances.
crystal: (adjective: crystalline) A solid consisting of a symmetrical, ordered three-dimensional arrangement of atoms or molecules. Most minerals have this organized structure; for example, apatite forms hexagonal crystals. The crystalline components of rocks are usually too small to be seen with the naked eye.
curator: A person who manages a collection of items in a museum, library, art gallery, etc. This person's main job is to design exhibits, organize and acquire collections, and research the artifacts in the collection.
Dehydrate: Losing a lot of fluid.
diamond: One of the hardest substances known on Earth and the rarest gemstones, diamonds are formed deep within the Earth when carbon is compressed under incredibly intense pressure.
Electronic: Negatively charged particles that usually orbit the outer regions of atoms and are also carriers of electricity in solids.
eye: (in atmospheric science) A roughly circular area of relatively weak winds surrounding the center of a severe tropical cyclone, which is completely or partially surrounded by eyewall clouds.
fluorescence: (verb fluoresce) adjective describing something that has the ability to absorb light and re-emit it. The re-emitted light is known as fluorescence.
green: (in chemistry and environmental science) an adjective describing a product or process that causes little or no harm to living organisms or the environment.
Hue: A colour or shade of a colour.
ion: (adjective: ionized) An atom or molecule that has become electrically charged by the loss or gain of one or more electrons. An ionized gas, or plasma, is one in which all electrons have been separated from their parent atoms.
mineral: A crystal-forming substance that makes up rocks, such as quartz, apatite, and various carbonates. Most rocks contain a mixture of several different minerals. Minerals are usually solid and stable at room temperature and have a specific formula or recipe (meaning the atoms are present in a specific ratio) and a specific crystal structure (meaning the atoms are arranged in a regular three-dimensional pattern). (physiology) The same chemicals the body needs to build and nourish tissues to stay healthy.
Nuclear power: Energy obtained from the process of producing heat by splitting atomic nuclei (fission) or combining them (fusion). Nuclear power plants use that heat to drive turbines and produce electricity.
peanut: Not true nuts (they grow on trees), these protein-rich seeds are actually legumes – related to the pea and bean family – that grow in underground pods.
planetThey are large celestial bodies that orbit stars, but unlike stars, they do not produce visible light.
Pressure: A force applied uniformly over an entire surface, measured as force per unit area.
radiation: (physics) One of the three main ways energy is transferred. (The other two are conduction and convection.) In radiation, electromagnetic waves carry energy from one place to another. Unlike conduction and convection, which require matter to transfer the energy, radiation can transfer energy into empty space.
Radioactive: Adjective used to describe an unstable element, such as certain forms (isotopes) of uranium or plutonium. Such elements are said to be unstable because their nuclei give off energy that is carried away by photons or one or more elementary particles. This energy release occurs through a process called radioactive decay.
tool: An object made or acquired by a person or another animal and used to serve some purpose, such as reaching for food, protecting oneself, or grooming oneself.
ToxicToxic: Poisonous, or capable of harming or killing cells, tissues, or whole organisms. A measure of the risk posed by such a toxin is its toxicity.
UV rays: That part of the light spectrum that is close to violet but is invisible to the human eye.
uranium: It is the heaviest naturally occurring element known. It is called element 92 after the number of protons in its nucleus. Uranium atoms are radioactive and decay into different atomic nuclei.
Visible light: A type of electromagnetic radiation with wavelengths ranging from 380 nanometers (violet) to 740 nanometers (red). Visible light has a shorter wavelength than infrared, microwave, and radio waves, but is longer than ultraviolet, X-rays, and gamma rays.
Source: www.snexplores.org
