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Leyes y Teorías Científicas
In science, a law is defined as a concise, verbal or mathematical, statement that summarizes a vast number of experimental observations. It…
El Método Científico
Chemistry is an empirical science. Scientists often pose questions to understand the chemistry in everyday life and seek answers to these questions.…
Clasificando la Materia por Estado
Chemistry is the study of matter and the changes it undergoes. Matter is anything that has mass and occupies space. Matter is all around us; the air,…
Clasificando la Materia por Composición
According to its composition, the matter can be classified into two broad categories — pure substances and mixtures.  A pure substance…
Propiedades Físicas y Químicas de la Materia
The characteristics that enable us to distinguish one substance from another are called properties. A physical property is a characteristic of…
¿Qué es la Energía?
The universe is composed of matter in different forms, and all forms of matter contain energy.  The different forms of energy on Earth originate…
Medición: Unidades Estándar
Every measurement provides three kinds of information: the size or magnitude of the measurement (a number), a standard of comparison for the…
Medición: Unidades Derivadas
The International System of Units or SI system, by international agreement, has fixed measurement units for seven fundamental properties: length,…
Incertidumbre en la Medición: Exactitud y Precisión
Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the…
Incertidumbre en la Medición: Instrumentos de Lectura
Counting is the type of measurement that is free from uncertainty, provided the number of objects being counted does not change during the process.…
Incertidumbre en la Medición: Cifras Significativas
All the digits in a measurement, including the uncertain last digit, are called significant figures or significant digits. Note that zero may be a…
Análisis Dimensional
Dimensional analysis, also known as the factor label method, is a versatile approach for mathematical operations. The main principle behind this…

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