- Gas
- (n.m.) One of the three states of matter. A gas occupies the entire volume available to it.
- Generator
- (n.m.) An element that transfers electrical energy to the rest of the circuit. The generator is the source of the electrical current flow.
- Gold
- (n.) Atom with atomic number Z equal to 79. It consists of 79 electrons orbiting a nucleus containing 79 protons and 118 neutrons. Symbol Au. Precious metal with a yellow and bright color. Gold is the most malleable and ductile of all metals. It can be reduced to sheets with a thickness of 1/1,000 of a mm. Its density is 19.3 kg/L. A good conductor of heat and electricity, it melts at 1063°C. Its boiling point is 2970°C. Unaffected by air, water, and acids, it is only soluble in a mixture of nitric acid and hydrochloric acid (aqua regia).
- Graduated Cylinder
- (n.) A graduated container used to precisely measure the volume of a liquid.
- Graphical Representation
- (n.) A curve in a coordinate system.
- Gravitation
- (n.f.) Attractive interaction between two objects possessing mass.
- Greenhouse Effect
- (n.) A natural phenomenon of planetary warming primarily due to water vapor, carbon dioxide, and methane present in the atmosphere.
- Grid
- (n.) A surface with fine lines used to decompose light.
- Haze
- (n.f.) (Old Provençal bruma, from Latin bruma, winter solstice) Light fog (horizontal visibility between 1 and 5 km).
- Hertz, Heinrich Rudolph (1857-1894)
- German physicist. Nobel Prize winner for his theory of luminescence.
- Hertz
- (n.m.) The legal unit of frequency, symbolized as Hz.
- Heterogeneous
- (adjective) Describes a mixture in which different liquids, solids, or gases can be distinguished with the naked eye or under a microscope.
- Hexamethylenediamine
- (n.m.) A colorless, harmful liquid. It is one of the reactants in the synthesis of nylon.
- Homogeneous
- (adjective) Describes a mixture in which only one liquid, solid, or gas is observed with the naked eye or under a microscope.
- Hydraulic Power Plant
- (n.) Plant that converts energy, generally accumulated by waterfalls at the foot of dams, into electrical energy.
- Hydrochloric Acid
- (n.) Colorless acidic solution with the formula (H+ + Cl-). It reacts with iron, zinc, and aluminum.
- Hydrogen
- (n.m.) An atom with an atomic number Z equal to 1. It is the smallest atom, consisting of one electron orbiting a nucleus that generally contains only one proton. Its symbol is H, and its model is represented as a white sphere.
- Hypermetropia
- (n.f.) A defect of the eye that results in blurry vision of nearby objects. It is corrected using a converging lens.
- Hypermetropic
- (adjective) Describes an eye that is not sufficiently convergent. Near vision is blurry.