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Parallel and Perpendicular Lines 150 150 Deborah

Parallel and Perpendicular Lines

Overview:  Lines and Angles Lines in geometry exist in relationships to one another by the angles they form when they intersect.  Those lines that do not intersect at all are parallel to each other.  Those that intersect at one point or another form angles where they intersect.  Perpendicular lines intersect at right angles, and have…

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Analyzing Reading Passages for Strategy, Organization, and Style 275 183 School Tutoring

Analyzing Reading Passages for Strategy, Organization, and Style

Overview:  Critical Reading and Standardized Testing The communication skills of critical reading are tested by standardized tests like the ACT and SAT.  Those skills are essential to college success, as students are expected to read critically in every class they take. Analysis of reading passages depends upon use of strategy, organization, and style. What Is…

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Transformations in Geometry 150 150 Deborah

Transformations in Geometry

Overview:  What Are Transformations? Transformations in geometry occur when a figure (the preimage) is moved or changed into another figure (the new image, or image), such that all points in the preimage map onto the image, and all points in the image can be mapped back onto the preimage.  The figures correspond to each other,…

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Types of Quadrilaterals 150 150 Deborah

Types of Quadrilaterals

Overview:  What Are Quadrilaterals? Quadrilaterals are polygons with four sides.  They are classified according to measures of equal angles and equal sides.  There are seven different types of quadrilaterals: parallelogram, rhombus, rectangle, square, kite, trapezoid, and isosceles trapezoid.  Types of quadrilaterals often overlap, so that a figure that fits in one category may also fit…

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Organic Compounds 150 150 Deborah

Organic Compounds

Overview: What Are Organic Compounds? All organic compounds contain carbon.  This is because of the atomic structure of carbon such that it can bind with up to four other elements at once.  For example, in the compound methane, four hydrogen atoms form a ring around one carbon atom.  In addition, most organic molecules consist of repeating…

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Using Writing Prompts for SAT and ACT Essays 171 295 School Tutoring

Using Writing Prompts for SAT and ACT Essays

Overview: Following Directions Standardized tests such as the SAT and ACT allow a relatively small amount of time for students to develop meaningful responses on the essay portion.  Examiners expect students to follow their initial directions, such as writing in pencil rather than pen, writing in the provided space on the answer sheet, and paying…

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Chemical Bonds and Reactions in Living Things 150 150 Deborah

Chemical Bonds and Reactions in Living Things

Overview Chemicals form the basic building blocks of matter in living things as well as nonliving things.  Molecules are formed by chemical bonds that join elements and make substances.  Chemical reactions are the basis of transformations of molecules into entirely different substances, the release of energy, and the processes of life. Ionic Chemical Bonds Ionic…

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Mixtures and Compounds in Living Organisms 150 150 Deborah

Mixtures and Compounds in Living Organisms

Overview Mixtures and compounds are important combinations of elements.  They are essential to the chemical processes that support living things, as well as those that occur every day in nonliving objects.  The basic difference is that elements and molecules in mixtures remain the same substances, and compounds result from chemical reactions, forming chemical bonds. Solutions…

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Structure of Cells 150 150 Deborah

Structure of Cells

Overview:  What Are Cells? Most cells are too small to be seen without a microscope, so theories about them did not exist until after microscopes were in use.  A scientist named Hooke called the small structures in a thin slice of cork “cells”, but it wasn’t until the 1800s that cell theory was really put…

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Microscopes: From Light to Electron 150 150 Deborah

Microscopes: From Light to Electron

Overview:  The Microscope The microscope is a valuable tool in biology and other sciences.  It allows investigators to study many objects that are too small to be seen with eyes alone.  While many observations can be done with simple and compound light microscopes, the smallest details are shown with electron microscopes. Simple Light Microscopes The…

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