(Encyclopedia) cryptographycryptographykrĭptŏgˈrəfē [key] [Gr.,=hidden writing], science of secret writing. There are many devices by which a message can be concealed from the casual reader, e.g.,…
How's That Again?Pronoun ReferenceIntroductionHow's That Again?It Just Proves There's Someone for EveryoneA Match Made in Writer's Heaven Read the following passage and summarize what it says.…
Copper MagicAdvanced-Level Science ProjectsChemistryWhat's in a Color?Copper Magic This is an easy experiment to conduct, but interesting because it involves several chemical reactions and you get…
The Question:
How long would it take to land a manned spacecraft on Mars?
The Answer:
According to NASA, a vessel with humans on it would take roughly six months to travel to Mars and another…
Intermolecular ForcesChemistryLiquids and Intermolecular ForcesWhat's a Liquid?Intermolecular ForcesThe Effects of Intermolecular Forces You may be familiar with the "ball pits" that can…
(Encyclopedia) Nadelman, ElieNadelman, Elieāˈlē nädˈəlmən [key], 1882–1946, Polish-American sculptor, b. Warsaw. He spent some time in Paris and is said to have influenced Picasso. Before he settled…
(Encyclopedia) American Medical Association (AMA), professional physicians' organization (founded 1847). Its goals are to protect the interests of American physicians, advance public health, and…
Dating a dinosaur skeletonRock layers of a cliff faceIndex fossilsRadiometric datingThe Age of Dinosaurs was so many millions of years ago that it is very difficult to date exactly. Scientists use…
Who Invented Chemistry?ChemistryWhy Study Chemistry?Why Do We Need Chemistry?What Have I Gotten Myself Into?This Stuff Is Really Fun!Who Invented Chemistry?Succeeding Where Others Have Failed If…
The Kinetic Molecular Theory of Gases: Why Gases Do What They DoChemistryThe Kinetic Molecular Theory of GasesWhat Are Gases?The Kinetic Molecular Theory of Gases: Why Gases Do What They DoWhy This…
