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antiseptic1488 [7]
3 years ago
7

3. Youve seen that it's possible for sound to break a car's windshield. Why do you

Geography
1 answer:
Shalnov [3]3 years ago
4 0
The vibrations in the air caused by the sound flexes and bends the glass to a breaking point.
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earth science question, 3) Meat production has _____ in the last 40 years. decreased tripled doubled quadrupled
kobusy [5.1K]

Answer: doubled

Explanation:guessing

7 0
3 years ago
Explain how looking at the magnetism of certain rocks helps support the idea that the continents have moved and changed over tim
enyata [817]

Twenty years ago geologists were certain that the data correlated perfectly with the then-reigning model of stationary continents. The handful of geologists who promoted the notion of continental drift were accused of indulging in pseudoscientific fancy. Today, the opinion is reversed. The theory of moving continents is now the ruling paradigm and those who question it are often referred to as stubborn or ignorant. This "revolution" in our concept of the earth's character is a striking commentary on the human nature of scientists and on the flexibility that scientists allow in use of the geological data.

Plate Tectonics

The popular theory of drifting continents and oceans is called "plate tectonics."1 (Tectonics is the field of geology which studies the processes which deform the earth’s crust.) The general tenets of the popular theory may be stated as follows. The outer lithospheric shell of the earth consists of a mosaic of rigid plates, each in motion relative to adjacent plates. Deformation occurs at the margins of plates by three basic types of motion: horizontal extension, horizontal slipping, and horizontal compression. Sea-floor spreading occurs where two plates are diverging horizontally (e.g., the Mid-Atlantic Ridge and East Pacific Rise) with new material from the earth's mantle being added between them to form a new oceanic crust. Transform faulting occurs where one plate is slipping horizontally past another (e.g., the San Andreas fault of California and the Anatolian fault of northern Turkey). Subduction occurs where two plates are converging with one plate underthrusting the other producing what is supposed to be compressional deformation (e.g., the Peru-Chile Trench and associated Andes Mountains of South America). In conformity with evolutionary-uniformitarian assumption, popular plate tectonic theory supposes that plates move very slowly — about 2 to 18 centimeters per year. At this rate it would take 100 million years to form an ocean basin or mountain range.

Fitting of Continents

The idea that the continents can be fitted together like a jigsaw puzzle to form a single super continent is an old one. Especially interesting is how the eastern "bulge" of South America can fit into the southwestern "concavity" of Africa. Recent investigators have used computers to fit the continents. The "Bullard fit"2 gives one of the best reconstructions of how Africa, South America, Europe, and North America may have once touched. There are, however, areas of overlap of continents and one large area which must be omitted from consideration (Central America). There are a number of ways to fit Africa, India, Australia, and Antarctica (only one can be correct!). Reconstructions have been shown to be geometrically feasible which are preposterous to continental drift (e.g., rotation of eastern Australia fits nicely into eastern North America).3

Those who appreciate the overall fit of continents call the evidence "compelling," while others who note gaps, overlaps, or emissions remain skeptical. It is difficult to place probability on the accuracy of reconstructions and one's final judgment is largely subjective.

Sea-Floor Spreading

Evidence suggesting sea-floor spreading is claimed by many geologists to be the most compelling argument for plate tectonics. In the ocean basins along mid-ocean ridges or rises (and in some shallow seas) plates are thought to be diverging slowly and continuously at a rate of several centimeters yearly. Molten material from the earth's mantle is injected continuously between the plates and cools to form new crust. The youngest crust is claimed to be at the crest of the ocean rise or ridge with older crust farther from the crest. At the time of cooling, the rock acquires magnetism from the earth's magnetic field. Since the magnetic field of earth is supposed by many geologists to have reversed numerous times, during some epochs cooling oceanic crust should be reversely magnetized. If sea-floor spreading is continuous, the ocean floor should possess a magnetic "tape recording" of reversals. A "zebra stripe" pattern of linear magnetic anomalies parallel to the ocean ridge crest has been noted in some areas and potassium-argon dating has been alleged to show older rocks farther from the ridge crest.

There are some major problems with this classic and "most persuasive" evidence of sea-floor spreading. First the magnetic bands may not form by reversals of the earth's magnetic field. Asymmetry of magnetic stripes, not symmetry, is the normal occurrence.4 It has been argued that the linear patterns can be caused by several complex interacting factors (differences in magnetic susceptibility, magnetic reversals, oriented tectonic stresses).5

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7 0
3 years ago
Describe TWO characteristics of limestone which make it susceptible to chemical weathering​
NeTakaya

Answer:

Limestone areas are predominantly affected by chemical weathering when rainwater, which contains a weak carbonic acid, reacts with limestone. This causes the limestone to dissolve. Carbon dioxide from the respiration of animals (and ourselves) is one cause of increased carbon dioxide in the atmosphere.

5 0
3 years ago
What determines how fast sea cliffs form? Select all that apply.
mario62 [17]
The frequency and speed of the wind

The energy of the waves hitting the shore

The hardness of the rock that makes up the shoreline

All of these will determine the shape and how fast a cliff is formed, such as the speed of the wind and water, as well as how hard a rock is, will shape how the rock looks like.

For example, if the wind and waves are traveling extremely quickly, and the rock is made of sand, the rock will break much quickly.

Hope this helps
8 0
3 years ago
Which country has adopted the euro as its currency
horsena [70]
States of the european union
3 0
3 years ago
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