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All Words (53 Words)

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Advanced Words (13 Words)

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Word List

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Word	Meaning	Advanced
ozone	n: a poisonous gas with the chemical formula O3, which has a strong smell
layer	n: a sheet, quantity, or thickness of the material, typically one of several, covering a surface or body; a level or part within a system or set of ideas
atmosphere	n: the mass of air that surrounds the Earth; the pervading tone or mood of a place, situation, or creative work
divide	v: to separate or cause to separate into parts or groups
troposphere	n: the lowest layer of the Earth’s atmosphere, extending from the surface to about 7 to 20 kilometers, where the majority of weather occurs
oxygen	n: the chemical element with the symbol O that is present in air and water and is necessary for people, animals, and plants to live
environment	n: the natural world such as air, water, and land in which humans, animals, and plants live
extend	v: to broaden in scope, range, or area
peak	n: the point to which something or someone is at its strongest, best, or most successful; the pointed top of a mountain
mount	v: to increase, go up, or advance gradually or continuously; to prepare and supply with the necessary equipment for execution or performance; to ride on something or someone
stratosphere	n: the second layer of the Earth’s atmosphere, extending from about 7 to 50 kilometers above the Earth’s surface, containing the ozone layer
molecule	n: a group of two or more atoms held together by attractive forces known as chemical bonds
concentration	n: the ability to focus all your time and energy on one thing without thinking about anything else.
approximately	adv: close to a specific number or time but not exactly that number or time
atom	n: the smallest unit of ordinary matter that forms a chemical element, composed of a nucleus and one or more electrons bound to the nucleus
norm	n: something that is regarded as usual, typical, or standard
absorb	v: to take in a fluid or other substance gradually
ultraviolet	adj: relating to or occupying the part of the spectrum beyond the violet end, especially radiation
radiation	n: the energy that comes from a nuclear reaction in the form of rays, waves, or particles and that can be hazardous to health
cataract	n: a clouding of the lens in the eye that affects vision; a large waterfall
sunburn	n: a painful reddening of the skin caused by overexposure to the sun’s ultraviolet rays
dam	n: a wall constructed over a river to block the flow of water, mainly used to generate energy
crop	n: a plant that is cultivated in large amounts, particularly for food
marine	adj: relating to the sea and the creatures and plants that live there
cycle	n: an interval during which a recurring sequence of events occurs; a bicycle or motorcycle
split	v: to divide, or to make something divide into two or more parts, especially along a particular line
unstable	adj: lacking solidity, persistence, or firmness and therefore not strong, safe, or likely to continue; lacking control of one’s emotions
bind	v: to tie or fasten someone or something tightly with rope, string, etc. so that they cannot move or are held together strongly
unfortunately	adv: by bad luck; unluckily
synthetic	adj: made by combining chemical substances as opposed to being naturally occurring
halogen	n: a non-metallic element from Group 17 of the periodic table, such as chlorine, bromine, or iodine, which has properties similar to those of the alkali metals
compound	n: an item composed of two or more distinct elements combined; a chemical formed by the combination of two or more elements
interfere	v: to get involved in and prevent a process or activity from continuing
release	v: to set free or allow to escape from confinement
invention	n: the creation of a new device or process resulting from study and experimentation; the act of inventing
miracle	n: an act or occurrence that is not explicable by natural or scientific laws and is therefore believed to be caused by God
stable	adj: firm and steady; not easily moved, disturbed, or changed
toxic	adj: of or relating to or caused by a poison; poisonous
substance	n: the real physical material of which a thing or person consist; the most important or main part of some idea or experience; an illegal drug
refrigerant	n: a substance used to transfer heat from one place to another in a refrigeration (the act of making or keeping things cold) system, usually in the form of a liquid or gas
propellant	n: a substance that provides the force to propel (= to cause something to move forwards) something, such as a rocket or spray can
spray	n: a fine mist of liquid that is dispersed into the air; flower arrangement consisting of a single branch or shoot bearing flowers and foliage
electron	n: a tiny particle with the negative electrical charge
sterilize	v: to make something free of all forms of life, especially bacteria or viruses, by using heat, chemicals, or radiation
metric	adj: using or relating to the meter as a unit of length; a system of related measures that facilitates the quantification of some particular characteristic
survive	v: to live or exist despite a dangerous event or period
chlorine	n: a chemical element with the symbol Cl and atomic number 17, a greenish-yellow gas that is highly reactive and used in a variety of applications, including as a bleach and disinfectant
destroy	v: to ruin or damage severely or completely; to eradicate or eliminate completely
depletion	n: the reduction of something, especially a natural resource, to a critically low level
protocol	n: a set of rules or procedures for transmitting data or conducting a process or activity, especially in computer networks or scientific experiments; the initial or original version of an agreement
ban	v: to officially or legally forbid or refuse to allow something
mend	v: to repair or fix something that is broken or damaged
volcano	n: a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are or have been erupted from the earth’s crust.