Why is it Called the Solar System? There are many planetary systems like ours in the universe, with planets orbiting a host star. Our planetary system is called “the solar system” because we use the word “solar” to describe things related to our star, after the Latin word for Sun, "solis."
A tag question is a small question that is attached , or "tagged", to the end of a sentence. Rather than repeat the main verb, a form of "be" or other auxiliary verb or modal is used in the tag. Below are a few examples. You came by train, didn’t you? It’s very windy today, isn’t it? You can meet me at the station, can’t you? You couldn’t give me a ride, could you?
STONE AGE. The Stone Age was a broad prehistoric period during which stone was widely used to make stone tools with an edge, a point, or a percussion surface. The period lasted for roughly 3.4 million years, [1] and ended between 4,000 BC and 2,000 BC, with the advent of metalworking . [2] Though some simple metalworking of malleable metals, particularly the use of gold and copper for purposes of ornamentation, was known in the Stone Age, it is the melting and smelting of copper that marks the end of the Stone Age. [3] In Western Asia , this occurred by about 3,000 BC, when bronze became widespread. The term Bronze Age is used to describe the period that followed the Stone Age, as well as to describe cultures that had developed techniques and technologies for working copper alloys (bronze: originally copper and arsenic...
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