What is the difference between hypothesis and theory in scientific research?
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A hypothesis is a specific, testable prediction made before conducting an experiment, whereas a theory is a well-substantiated explanation for a set of phenomena. A hypothesis is often developed into a theory if it is consistently supported by evidence. In scientific research, a theory is a more comprehensive and broadly applicable explanation.
What is the definition of pH in chemistry?
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pH is a measure of the concentration of hydrogen ions in a solution, with a pH of 7 being neutral (neither acidic nor basic), and pH values below 7 being acidic and above 7 being basic.
What is the term for the process of evolution through the natural selection of genetic variations?
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The term for this process is natural selection. It is the driving force behind the evolution of species over time, as individuals with advantageous traits are more likely to survive and reproduce.
What is the difference between an element and a compound in chemistry?
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An element is a pure substance consisting of only one type of atom, whereas a compound is a substance formed by the chemical bonding of two or more different elements. Compounds have properties that are different from those of their individual components.
What is the term for the movement of water molecules from an area of high concentration to an area of low concentration?
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The term for this process is diffusion. It is a fundamental concept in chemistry and biology, and is essential for many biological processes, including the transport of nutrients and waste products within living organisms.
What is the definition of entropy in thermodynamics?
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Entropy is a measure of the disorder or randomness of a system, with higher entropy indicating greater disorder. In thermodynamics, entropy is often used to describe the amount of thermal energy unavailable to do work in a system.
What is the term for the process of radioactive decay, in which unstable atoms lose energy and stability by emitting radiation?
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The term for this process is radioactivity. It is a fundamental process in nuclear physics, and is responsible for the decay of unstable atomic nuclei into more stable forms.