Streak is tested by scraping a mineral across a streak plate.
Explanation:
Colour and streak are the properties of the minerals which describes the appearance. The colour of the mineral is not a reliable property because sometimes some minerals may have more than one colours. At times there may be situations where many minerals have same colour too. The colour of the minerals is due too the impurities present in the minerals.
Steak is also another reliable property can also be used to determine the appearance of the mineral. Steak is the colour of the powdered form of mineral. The check the streak of the material, scrape the mineral against the un-glazed porcelain plate. Minerals that have same colours have different streaks too.Steak is a reliable property than colour because steak does not change from time to time .
The most appropriate answer would be magma. Lava is a magma that reaches the Earth's surface, which is technically it is also a magma, and magma is located below the Earth's surface.
Lava at Earth's surface or magma below Earth's surface cools and harden to form mineral crystals.
As Brazil is the state that produces most of the coffee and is responsible for the two-thirds of the coffee plantation and it covers about 27,000 km square, mainly located n the southeastern states and thy provide and that ideal growing conditions and is coffee is native to the country as about 220,000 farms re involved on the coffee plantations most of them are harvested on the dry June to September.
In cases of the drought the price of the coffee is expected to grow with the increasing and growing demands this may lead to the increase of the coffee from the neighboring countries and increasing in the taxation of the coffee production and this may lead to the lowering of the quality of the product.
