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Sciences Naturelles SAT - Substances Chimiques et Propriétés

Ici, vous apprendrez quelques mots anglais liés aux substances et propriétés chimiques, tels que "salin", "tampon", etc., dont vous aurez besoin pour réussir vos SAT.

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SAT Vocabulary for Natural Sciences
catalyst

(chemistry) a substance that causes a chemical reaction to happen at a faster rate without undergoing any chemical change itself

catalyseur

catalyseur

Ex: Enzymes are naturally occurring biological catalysts that allow complex metabolic reactions to proceed efficiently in living cells. 
buffer
buffer
[nom]

a solution containing a weak acid and its conjugate base, or a weak base and its conjugate acid, which maintains a stable pH when small amounts of acid or base are added

tampon, solution tampon

tampon, solution tampon

Ex: The buffer solution in the lab kept the pH steady even after the addition of a strong acid. 
reactant

a substance that takes part in and undergoes a chemical reaction, leading to the formation of new products

réactif

réactif

Ex: In photosynthesis, carbon dioxide (CO₂) and water (H₂O) are the reactants that, in the presence of sunlight, produce glucose (C₆H₁₂O₆) and oxygen (O₂). 
reagent
reagent
[nom]

a substance or compound used in a chemical reaction to detect, examine, or produce other substances

réactif

réactif

Ex: The chemist carefully measured the reagent before adding it to the reaction flask. 
noble gas

any of the elements in Group 18 of the periodic table, including helium, neon, argon, krypton, xenon, and radon, characterized by their inert nature and stable electron configurations

gaz noble, gaz rare

gaz noble, gaz rare

Ex: Helium, a noble gas, is known for its low density and is often used in balloons to make them float. 
inert gas

a group of non-reactive gases that typically exhibit low chemical reactivity due to their stable electron configurations

gaz inerte, gaz noble

gaz inerte, gaz noble

Ex: Inert gases like helium and argon are commonly used in welding to shield the molten metal from reacting with oxygen in the air. 
halogen
halogen
[nom]

a type of chemical element found in Group 17 of the periodic table, known for being highly reactive and commonly used in disinfectants and lights

halogène, élément halogène

halogène, élément halogène

Ex: Chlorine is a halogen commonly used in water treatment for its disinfectant properties. 
polythene

a durable plastic material used for packaging, bags, and various applications

polyéthylène, plastique

polyéthylène, plastique

Ex: Supermarket shopping bags are often made of polythene material. 
polystyrene

a lightweight and versatile synthetic polymer used in packaging, insulation, and disposable products

polystyrène, styromousse

polystyrène, styromousse

Ex: The food industry favors polystyrene containers for their excellent insulation and cost-effectiveness. 
phosphorous
phosphorous
[Adjectif]

referring to the essential chemical element phosphorus, which is vital in biological processes and various industrial applications

phosphoreux, phosphorique

phosphoreux, phosphorique

Ex: Plants require phosphorous for healthy growth and development. 
acetone
acetone
[nom]

a colorless, volatile liquid solvent commonly used for removing nail polish and other substances from surfaces

acétone, propanone

acétone, propanone

alginate

a naturally occurring polysaccharide derived from brown seaweed, commonly used in various industries for its thickening, gelling, and stabilizing properties

alginate, algin

alginate, algin

silicate

a compound containing silicon and oxygen atoms, often forming minerals or glasses, with diverse applications in industry and nature

silicate, composé silicaté

silicate, composé silicaté

Ex: Quartz is a common silicate mineral found in many types of rocks. 
graphene

a single layer of carbon atoms arranged in a two-dimensional honeycomb lattice, known for its exceptional strength, electrical conductivity, and flexibility

graphène, une couche unique d'atomes de carbone disposés en un réseau hexagonal bidimensionnel

graphène, une couche unique d'atomes de carbone disposés en un réseau hexagonal bidimensionnel

malic acid

a naturally occurring organic compound found in many fruits that contributes to their sour taste

acide malique

acide malique

citric acid

a weak organic acid found naturally in citrus fruits like lemons, oranges, and limes, commonly used as a food additive for flavoring and preserving

acide citrique, acide de citron

acide citrique, acide de citron

Ex: Lemon juice contains citric acid, giving it its characteristic tart flavor. 
phosphate

a chemical compound that contains phosphorus and oxygen atoms, commonly found in salts or esters of phosphoric acid, important for biological processes and industrial applications

phosphate, un composé chimique contenant des atomes de phosphore et d'oxygène

phosphate, un composé chimique contenant des atomes de phosphore et d'oxygène

Ex: Plants absorb phosphates from the soil to promote healthy root development and flower formation. 
charm quark

a type of elementary particle that is one of the six types, or flavors, of quarks that has an electric charge of +2/3 and participates in strong and electromagnetic interactions

quark charm, quark de charme

quark charm, quark de charme

Ex: Physicists at the Large Hadron Collider study collisions to observe the behavior of charm quarks in high-energy experiments. 
disinfectant

something that has specific chemicals or causes a chemical reaction that destroys harmful microorganisms such as bacteria

désinfectant

désinfectant

bicarbonate

a chemical compound important for regulating pH balance, found in baking soda and crucial for bodily functions

bicarbonate, hydrogénocarbonate

bicarbonate, hydrogénocarbonate

Ex: Baking soda contains bicarbonate, which helps baked goods rise when mixed with acidic ingredients. 
solute
solute
[nom]

a substance that is dissolved in a solvent, resulting in a solution

soluté, substance dissoute

soluté, substance dissoute

Ex: In saltwater, salt (NaCl) is the solute that dissolves in water, the solvent. 
saturated
saturated
[Adjectif]

having absorbed as much of a substance as possible at a given temperature, reaching its maximum concentration

saturé, imbibé

saturé, imbibé

Ex: The saturated sugar solution had reached its limit and could not dissolve any more sugar crystals. 
ethereal
ethereal
[Adjectif]

(of a solution) containing volatile or highly flammable substances, such as diethyl ether

éthéré, éthérique

éthéré, éthérique

Ex: The reaction mixture was distilled under vacuum to remove the ethereal solvent. 
inorganic
inorganic
[Adjectif]

describing chemical compounds that do not contain carbon-hydrogen bonds and are typically derived from minerals or non-living matter

inorganique

inorganique

Ex: Sodium chloride (table salt) is an inorganic compound widely used in cooking and food preservation. 
solvent
solvent
[nom]

a liquid that is capable of dissolving another substance

solvant

solvant

Ex: Ethanol is commonly used as a solvent to dissolve oils and perfume essences for the production of aftershaves and colognes. 
alkaline
alkaline
[Adjectif]

refering to substances that have a pH greater than 7, indicating a basic or non-acidic nature

alcalin

alcalin

Ex: Soap is often alkaline, making it effective for cleaning grease and oils. 
saline
saline
[Adjectif]

containing or relating to salt

salin

salin

Ex: The doctor administered a saline solution to rehydrate the patient. 
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