ICTS Science-Chemistry 106 Teacher Certification Test Prep by Sharon Wynne

By Sharon Wynne

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Extra info for ICTS Science-Chemistry 106 Teacher Certification Test Prep Study Guide, 2nd Edition (XAM ICTS)

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SCIENCE: CHEMISTRY 24 TEACHER CERTIFICATION STUDY GUIDE Lise Meitner and Otto Hahn discovered nuclear fission in the 1930s. Glenn Theodore Seaborg created and isolated several elements larger than uranium in the 1940s. Seaborg reorganized the periodic table to its current form. James Watson and Francis Crick determined the double helix structure of DNA in the 1950s . Neil Bartlett produced compounds containing noble gases in the 1960s, proving that they are not completely chemically inert. Harold Kroto, Richard Smalley, and Robert Curl discovered the buckyball C60 in the 1980s.

Modeling and simulation may also reveal potential problems that scientists can address prior to full-scale implementation of the solution. Experimentation allows for evaluation of proposed solutions in a controlled environment where scientists can manipulate and test specific variables. 1 UNDERSTAND AND APPLY KNOWLEDGE OF ACCEPTED PRACTICES OF SCIENCE. , tentative, replicable, historical, empirical) and recognize how scientific knowledge and explanations change over time. Probably one of the best examples of the progressive development of science would be the development of atomic theory.

Other craft traditions in brewing, tanning, and dyeing led to many useful empirical ways to manipulate matter. Ancient philosophers in Greece, India, China, and Japan speculated that all matter was composed of four or five elements. The Greeks thought that these were: fire, air, earth, and water. Indian philosophers and the Greek Aristotle also thought a fifth element—"aether" or "quintessence"—filled all of empty space. The Greek philosopher Democritus thought that matter was composed of indivisible and indestructible atoms.

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