There are many ways to determine what minerals are present in a sample. You can observe its color, streak, luster, magnetism, cleavage and hardness. Obviously, you can see what color it is and whether it is metallic or cloudy, but other tests may be required. Streak is tested by rubbing the mineral onto a streak slab of concrete to see what color the powder is. Magnetism is determined by putting a magnet next to the sample, or placing it next to a dish of iron filings. Cleavage is determined by cracking the sample to see the way it fractures. Finally, to determine hardness, you scratch test rocks with the sample, like as controls. I hope this answered your question. (Also, questions like this would best fit under chemistry, because geography is the study of political land)
"Erratics" are large rocks that are not the same as the rock types found in the area and are deposited by the glaciers as they move or melt.
<h3>What are erratics?</h3>
Stones and rocks that were carried by a glacier and then abandoned after the glacier melted are known as glacial erratics.
Some characteristics of erratics are-
- The bedrock where the glacial erratic is deposited has a distinct lithology from the sort of rock that makes up the glacier erratic.
- A sandstone boulder moved by a glacier and placed on top of limestone bedrock would be an example of an erratic.
- Scientists can identify and locate the source outcrop of some erratics because they are made of a particular type of distinguishable rock.
- In order to recreate historical glacier flow directions, the timing of glacier retreat, and even the type of glacier flow, it is helpful to analyze glacial erratics.
- Large boulders, tiny stones, and pebbles can all be erratic. Every erratic is made of a unique sort of rock.
To know more about the formation of erratics, here
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<h3>Peruvian adaptations to their physical environment</h3>
Explanation:
The Peruvians adapted to their natural environment of high altitude mountains like the Andes. The mountains created environmental challenges like low temperature, decreased precipitation, poor thin soil etc.
The Peruvians utilized the mountains in the most sustainable and efficient way both for agriculture as well as irrigation purposes. They followed terrace agriculture along the high mountain regions and built aqueducts to supply water for drinking and irrigation.
The agricultural terraces were constructed in such a way it received a good amount of sunlight even though sunlight was blocked by the surrounding high mountains. The crops were spaced widely to ensure proper sunlight and crop growth.
The irrigation system through aqueducts was constructed to prevent flooding.
Answer:
As they descended the mountain, they burnt the forest trails in order for the paths up to the site to be completely destroyed
Explanation:
