chemical change


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chemical change

A process in which molecular bonds break or form to create substances with new properties or characteristics. For example, oxygen and hydrogen combine to form water. Sodium (a metal) and chlorine (a gas) combine to form sodium chloride, or common salt. Glucose (C6H10O5) is metabolized to carbon dioxide (CO2) and water (H2O). Oxygen combines with hemoglobin to form oxyhemoglobin when the hemoglobin in the blood comes into contact with the oxygen in the air contained in the alveoli of the lungs. A chemical change is also known as a chemical reaction.
References in periodicals archive ?
According to their explanations, it is a chemical change because the acid gets ionised and a new product is formed.
3) The majority opinion, not yet a consensus, is that the chemical change was caused by some sort of radiation impinging on the Shroud as it enclosed the dead body of The Man in the Shroud.
c] as the variable product reflecting chemical changes that occur during the aging process.
Together, these chemical changes create a high risk for gallstone formation.
Identify when a chemical change is taking place by observing a change in temperature, the appearance of new substances or the disappearance of an original substance; and
2 When an enzyme and substrate combine, their interaction causes a chemical change within the substrate - in this case, for example, splitting it into two bits.
SMELTER--One who melts or fuses (as ore), often producing an accompanying chemical change usually to separate the metal.
The books have described a wide variety of experiments to illustrate the difference between physical and chemical change.
Cote, who has been a classroom teacher, community college instructor, and gifted and talented resource specialist, and Blauvelt, a teacher in various settings and gifted and talented resource specialist, provide teachers, gifted program directors, and resource specialists with nine science lessons for high-ability learners in grades six through eight that focus on the concepts and definitions of physical and chemical change.
He also said that the fish could have possibly fed on insects and might have detected a chemical change in the water before swimming up the urine trail and biting human genitals.
This has direct implications for teachers as the curriculum (Years 3-6) refers to the mixing of substances and chemical change.
And although polyunsaturated fats are healthier,it advises against heating them because the chemical change turns them into unhealthy transfats.