Chemistry Parrus

Chemistry has never been more easy. Enrich your background with lectures, +30 quizes and assignments.

Worst Subject? Chemistry teachers will tell you that there is an experience they have all had many times. Someone will ask them, "What do you do for a living?" and when they reply, "I'm a chemistry teacher," the all-too-common response is: "That was my worst subject!" Why is that? Is high school chemistry just so intrinsically difficult that only students with great intellectual gifts are capable of succeeding without heroic efforts? Frank Cardulla doesn't believe that for a moment, and he will hopefully convince you, as he has thousands of high school students, that "chemistry is the easiest class in school."

Each topic is presented to the student using numerous example problems and a detailed lecture that is designed to supplement any Chemistry course. Chemistry seems challenging to most students because there are a great deal of foreign definitions introduced early in the course.

In the period 1700-1900, kings and empires rose and fell, but science conquered all, taking the world by storm. Yet, as the 1700s began, the mysteries of the universe were pondered by "natural philosophers"—the term "scientist" didn't even exist until the mid 19th century—whose explanations couldn't help but be influenced by the religious thought and political and social contexts that shaped their world.

All human beings, by nature, desire to know." —Aristotle, The Metaphysics. For well over 2,000 years, much of our fundamental "desire to know" has focused on the area we now call science. In fact, our commitment to science and technology has been so profound that these now stand as probably the most powerful of all influences on human culture.

The study of Electricity and Magnetism in Physics is challenging for most students because the concepts usually involve higher math that requires the problems to be fully understood prior to starting work. In addition, the concepts always involve invisible electric and magnetic fields which are hard to visualize for most students.

Introduction to Biology science and high school biology

Who has not gazed with wonder at the night sky, especially from a dark site far away from city lights? The great canopy of stars stretching overhead suggests that our world is part of a vastly larger cosmos. But how large is it? Where do we fit in? And how did it all begin? These questions have puzzled stargazers for thousands of years, and the search for answers helped spark the great advances of the scientific revolution in the 16th and 17th centuries. But only in our own time has the full picture of the true immensity, variety, and surpassing strangeness of the Universe come into focus.

One of the greatest scientific feats of our era is the astonishing progress made in understanding the intricate machinery of life. We are living in the most productive phase so far in this quest, as researchers delve ever deeper into the workings of living systems, turning their discoveries into new medical treatments, improved methods of growing food, and innovative new products.

One day in 1900, German physicist Max Planck told his son that he had made a breakthrough as important as Isaac Newton's discovery of the workings of the universe. Planck had reached the surprising conclusion that light behaves as if it is packaged in discrete amounts, or quanta, a seemingly simple observation that would lead to a powerful new field of physics called quantum mechanics.