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FinnZ [79.3K]
1 year ago
14

continental drift was first proposed by a scientist named alfred . he theorized that the were once one large landmass that drift

ed apart very slowly over a long time.
Geography
1 answer:
asambeis [7]1 year ago
4 0

Answer: large-scale horizontal movements of continents relative to one another and to the ocean basins during one or more episodes of geologic time. This concept was an important precursor to the development of the theory of plate tectonics, which incorporates it.The idea of a large-scale displacement of continents has a long history. Noting the apparent fit of the bulge of eastern South America into the bight of Africa, the German naturalist Alexander von Humboldt theorized about 1800 that the lands bordering the Atlantic Ocean had once been joined. Some 50 years later, Antonio Snider-Pellegrini, a French scientist, argued that the presence of identical fossil plants in both North American and European coal deposits could be explained if the two continents had formerly been connected, a relationship otherwise difficult to account for. In 1908 Frank B. Taylor of the United States invoked the notion of continental collision to explain the formation of some of the world’s mountain ranges.

Explanation:

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Adam, who is 5'6" tall, notices his shadow on the sidewalk. If the angle of elevation from the tip of the shadow to the sun is 6
german
<h2>Answer:</h2>

This problem can be solved using trigonomtry, assuming that the figure formed by Adam's shadow and Adam himself is a Right Triangle (as shown in the figure attached).


According to this,  the distance from the tip of the shadow to the top of Adam's head is the hypotenuse H of the triangle, and we already know Adam's height and the angle of elevation. So, the trigonometric function that best works in this case is sine:


sen(angle)=\frac{Oppositeleg}{hypotenuse}  


Where the opposite leg is the side of the triangle that is opposite to the 60\º angle.

In this especific case:


sen(60\º)=\frac{5.6feet}{H}     (1)


In order to know the value of the hypotenuse we have to find  H from equation (1):

H=\frac{5.6feet}{sen(60\º)}



H=6.4663 feet



Rounding:

H=6.46 feet>>>>>This is the distance from the tip of the shadow to the top of Adam's head



8 0
2 years ago
Read 2 more answers
What would happen if a sedimentary rock was first exposed to energy from the sun and then millions of years later to energy from
abruzzese [7]

Answer: to me personally I think They would become igneous rocks

Explanation:

If originally, sedimentary rocks are exposed to energy from the sun, no changes will occur to them.

  1. The temperature of the sun does not change the materials of the earth substantially.
  2. There is a very significant effect of the heat from the interior on rocks, especially sedimentary rocks.
  3. Heat can hit a whopping 6000 ° C from the inside, which is more than enough to cause a metamorphic shift in a rock in the body.
  4. Actually, the igneous rock will be formed from the sedimentary rock at this temperature.
4 0
2 years ago
Over the course of 130 years, the lighthouse in the photo above "moved" closer and closer to the beach. Of course, the lighthous
postnew [5]
Most likely due to the movement of plate tectonics. They are plates of earth under the ocean that move occasionally, over the years this is probably what happened. Plate tectonics are also the cause of most earthquakes and even tsunamis. Erosion could also play a factor in this as well.
4 0
2 years ago
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Describe, step by step, how we can map the field of variable quantity
vampirchik [111]

her is this from google

"A system of temporary reference points established in the field allows users to move freely within the study area without losing the geo-referencing. It allows the user to perform the mapping of trees, deadwood, transects, repeated measurements and data verification."


7 0
2 years ago
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An archaeological team has been excavating three ancient village sites—Barras, Agna, and Cussaia—looking in particular at kitche
frutty [35]

Answer:

By excavating the kitchen area the archaeological team understands the ways of the ancient villages' consumption of food and the trading of the consumable items along with the potteries which can be found in the waste dump areas. By excavating these villages the pattern of growing crops can be understood if they cultivated or consumed wild crops, along with whether the society was agrarian or hunter-gathering. The dietary patterns of eating, drinking, and utensils with food residues can be examined.  

   

3 0
2 years ago
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