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Science Review of More about Solar Eclipses 150 150 Deborah

Science Review of More about Solar Eclipses

Overview During solar eclipses, more is revealed about the features in the sun’s corona.  The corona is not normally visible to the naked eye, so scientists began studying it long before satellites were launched into space.  In addition, observations during a solar eclipse brought important early proof of Einstein’s theory of relativity. Ancient History of…

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Science Review of the Solar Eclipse 150 150 Deborah

Science Review of the Solar Eclipse

Overview On Monday, August 21, 2017, many people in North America will be able to see either a partial solar eclipse or a total solar eclipse, depending on where they live.  Parts of South America, Africa, and Europe will also see a partial solar eclipse. What Is an Eclipse? During a solar eclipse, the moon…

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Math Review of Multiplying and Dividing Rational Expressions 150 150 Deborah

Math Review of Multiplying and Dividing Rational Expressions

Overview The process of multiplying and dividing rational expressions is similar to multiplying and dividing rational numbers.  In order to multiply, first multiply the numerators, then the denominators, and then simplify the expression.  Division is the inverse of multiplication, so multiply by the reciprocal (or inverse) of the divisor, and then simplify the expression. Multiplying…

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Math Review of Simplifying Rational Expressions 150 150 Deborah

Math Review of Simplifying Rational Expressions

Overview A rational expression has one polynomial in the numerator and one polynomial in the denominator, which means that the numerator is divided by the denominator.  However, the denominator cannot be solved to zero, because division by zero is undefined.   Definition A statement such as (x2 +3)/(y +6) is a rational expression, because it…

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English Review of World Poetry 284 177 Deborah

English Review of World Poetry

Overview Forms of poetry exist all over the world, some predating writing. Poems are written in specific forms from the Far East through Persia and Arabia, using specific features of the culture and language. For example, the Epic of Gilgamesh, written in Sumeria in the third millennium BCE, uses common features of Sumerian language and…

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English Review of Types of Poetry 381 132 Deborah

English Review of Types of Poetry

Overview Poetry is based upon aesthetic and rhythmic qualities of language, and exists across all cultures of the world.  Some say that poems, like music, came before literacy, and poetic tales made important facts easier to remember.  There are hundreds of subtypes of poetry, and some types include narrative poetry, epic poetry, lyric poetry, and…

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Science Review of Jellyfish 299 168 Deborah

Science Review of Jellyfish

Overview Jellyfish are found in all the world’s oceans, from the surface to the deep sea.  Most live in saltwater, although there are a few species that live in fresh water.  Jellyfish have soft bodies and swim freely for much of their adult lives. Kinds of Jellyfish There are hundreds of different species of jellyfish. …

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Science Review of Rays 252 200 Deborah

Science Review of Rays

Overview Rays are fish that are close relatives of sharks.  There are over 600 species, and most live in tropical or subtropical marine environments.  Like sharks, their skeletons are made of cartilage rather than bone.  They live on the sea floor, and some species eat smaller fish, other bottom-dwellers such as crustaceans, and others eat…

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Math Review of Graphing Compound Inequalities 358 120 Deborah

Math Review of Graphing Compound Inequalities

Overview Inequalities can be graphed along the number line by solving the inequality and then graphing it.  Conjunctions are true when both statements of an inequality are true.  Disjunctions are true when either one or both statements of an inequality are true.  Both conjunctions and disjunctions can form the basis for truth tables. Review of…

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Math Review of Digit and Coin Problems 240 180 Deborah

Math Review of Digit and Coin Problems

Overview Some very common word problems are problems involving digits and problems involving coins.  Like motion problems, these word problems can also be solved using equations in two variables. Setting up a Digit Problem Any two-digit number can be written as 10x +y where x is the number in the tens column and y is…

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