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Covid-19 a serious, sometimes fatal, disease caused by a certain type of virus called a "coronavirus." This particular coronavirus broke out for the first time in 2019, and the disease spread all over the world in 2020. "Co" in Covid stands for "corona," "vi" stands for "virus," and "d" stands for "disease." The number 19 refers to the year 2019. The name "Covid-19" is oftened shortened to "Covid."
supercontinent a giant piece of land that scientists believe existed a very long time ago on the earth. It is thought that this piece of land broke into parts which drifted away from each other. The smaller pieces of land are the seven continents that we have now on the earth. These are Africa, Antarctica, Asia, Australia, Europe, North America, and South America.