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The Rockfinder shares some tips for rock hunting.
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A brief review of important safety guidelines
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The Supreme Court declares bus segregation illegal, propelling events toward the Civil Rights Act of 1964.
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Learn how to maintain healthy respiratory and circulatory systems
Learning Objectives
- Know the functions of the respiratory system. There are actually two major types of respiration. One type, inhalation and exhalation, brings oxygen into the lungs and forces out carbon dioxide. The second type of respiration occurs inside the body’s cells, where oxygen combines with food to produce energy.
- Identify and describe ...
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Supporting Activities
- Blood flow: Give a copy of a heart cutaway to each student (the picture should show each of the four chambers and the veins and arteries that enter and leave the heart). Each student should also have a red crayon (oxygenated blood) and a blue crayon (deoxygenated blood). Have your students trace the flow of blood through the heart (from the...
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