Science

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Science Review of Stellar Structure and Nuclear Reactions inside Stars
Science Review of Stellar Structure and Nuclear Reactions inside Stars 150 150 Deborah

Overview The nuclear energy that powers stars depends upon the core temperature and the available fuel. During the main-sequence phase for most stars, nuclear fusion of 4 hydrogen atoms to…

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Science Review of White Dwarfs, Neutron Stars, and Black Holes
Science Review of White Dwarfs, Neutron Stars, and Black Holes 150 150 Deborah

Overview When hydrogen fuel is exhausted within a stellar core, rapid changes take place within the star depending upon its mass and temperature. Some of these nuclear reactions result in…

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Application of Binary Math to Computers
Application of Binary Math to Computers 150 150 Deborah

Overview The binary (Base 2) system is based upon powers of 2. It has many applications to situations that have only two alternatives, such as off and on, 0 and…

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Science Introduction to the Life Cycle of Stars
Science Introduction to the Life Cycle of Stars 150 150 Deborah

Overview Stellar evolution is the theory of the life cycle of stars. Scientists observe many different stars at various stages, starting with the earliest condensations from clouds of nebular gas…

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Science Review of the Supernova
Science Review of the Supernova 150 150 Deborah

Overview A supernova (plural supernovae) occurs when a star over twice the mass of the sun explodes. It is theorized to occur near the end of the huge star’s life,…

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Review of Alchemy to Chemistry
Review of Alchemy to Chemistry 150 150 Deborah

Overview Before there was a science of chemistry, there was alchemy. It was practiced in China, India, Mesopotamia, and Europe. The alchemists from ancient times performed experiments to transform base…

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Scientific Measurement of Length, Mass, Volume, and Temperature
Scientific Measurement of Length, Mass, Volume, and Temperature 150 150 Deborah

Overview Accurate observations of phenomena are one of the keys to success in lab sciences such as chemistry, physics, and biology. The metric system, or international system (SI), is used…

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Science Review of Mass and Weight
Science Review of Mass and Weight 150 150 Deborah

Overview Mass and weight define distinct but related concepts. Mass refers to the quantity of matter an object contains, is measured by a balance, and is invariant no matter where it…

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ACT Science: Data Representation
ACT Science: Data Representation 425 282 School Tutoring

The ACT science exam does not require students to have in-depth understanding of biology, chemistry and/ or physics. It simply tests students on how to read and analyze  scientific passages.…

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Stoichiometry: Dealing with Excess and Limiting Reactants
Stoichiometry: Dealing with Excess and Limiting Reactants 3867 2578 School Tutoring

Overview: In many chemical reactions there is an excess reactant a limiting reactant. The amount of product produced is determined by the stoichiometric calculations using the amount of limiting reactant…

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