Acids and bases, Students will learn about acids and bases through a class discussion and then test a dilute acid and dilute base with neutral litmus paper to learn how the paper indicates something is acidic or basic.
Universe II Large Sized Chart, 59 x 42 Inch, The poster sized chart is good fit for bulletin boards and walls, Illustrates major stages in the evolution of the universe starting with the Big Bang, Provides a summary of modern cosmology
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