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1. List any earth science topics you observe.
2. Are these facts, theories, hypotheses, or fiction?
In science, a new idea has the power to change everything we thought we knew about our world. But how do scientists prove that their new ideas are correct? What happens when other scientists disagree with the new idea?
Scientists collect evidence, including objects they have found and things they have observed, as part of their research. Then, based on this evidence, they come up with a theory that explains how something occurs—or has occurred—in the natural world.
Scientists use theories to explain everything from how the universe began to why objects fall to the ground. In 1915, German scientist Alfred Wegener published a book to present a theory he called "continental drift." Wegener believed that the large pieces of land we call continents move over long periods of time. Even though Wegener found strong evidence to support his theory, most scientists did not accept the theory.
It looks like South America and Africa could have fit together. Were they actually joined together at one time?
Wegener and His Evidence
Read the article on Alfred Wegener.
Place the puzzle pieces together properly.
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