A jet stream is a narrow variable band of very strong predominantly westerly air currents encircling the globe several miles above the earth.
Answer:
The "streak test" is a method used to determine the color of a mineral in powdered form. The color of a mineral's powder is often a very important property for identifying the mineral. The streak test is done by scraping a specimen of the mineral across a piece of unglazed porcelain known as a "streak plate."
Explanation:
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The circulation of water is called the water cycle
