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otez555 [7]
3 years ago
12

How do magnetic stripes on the ocean floor serve as evidence for seafloor spreading? A. Their symmetry on either side of the mid

-ocean ridge shows that new crust is created, then split. B. They show that island arc volcanism creates new oceanic crust at the mid-ocean ridges. C. Their symmetry on either side of mid-ocean ridges shows that transform boundaries are sliding boundaries. D. Their patterns show that the Earth's magnetic field reverses every few hundred years, on average. E. the magnetic stripes correlate with time.
Geography
1 answer:
Anestetic [448]3 years ago
5 0

Answer:

D. Their patterns show that the Earth's magnetic field reverses every few hundred years, on average

Explanation:

  • The seafloor spreading is a process of the mid-oceanic ridges where the oceanic crust is formed by volcanic activity and it gradually moves on both sides of the ridges.
  • The spreading takes place through the magma which are magnetized by the earth's magnetic field and spread in the direction of positive and negative properties.
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People living in the Sahel region in countries such as the Sudan, Chad, and neighboring Ethiopia suffer from undernourishment, d
olganol [36]

Answer: Please refer to Explanation

Explanation:

Undernourishment

This is defined as being unable to take the required amount of food and nutrients for energy that the body needs per day. This has to have gone on for a year for it to be classified as Undernourishment.

Desertification

This refers to a situation where land that was once fertile looses that fertility and instead begins to become more desert like. This is very prevalant in the Sahel region of Africa and can be caused by droughts and inefficient farming practices.

Food Security

This is defined as the access to sufficient, safe, and nutritious food at all times needed to be able to sustain the human body by meeting the minimum amount of recommended energy that the body requires to function.

The Sahel is an area immediately south of the Sahara Desert. It is semi-arid in nature and is prone to prolonged periods of drought.

When this drought occurs it tends to cause soil that was once fertile to begin to turn into a desert like soil due to the soil not getting water for such a prolonged period of time.

When there is a lot of fertile land used for farming lost to desertification then the people in those areas cannot farm and get food needed to survive. This causes Food Security issues because people do not have access to food that they require to survive.

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4 0
3 years ago
Why is understanding the human geography of Southwest Asia and North Africa important?
nataly862011 [7]
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8 0
3 years ago
BD is the angle bisector of ZABC
Thepotemich [5.8K]

Answer:

x = 7, y = 2

Explanation:

Two triangles are said to be congruent if all three sides and three angles of one triangle is equal to three sides and three angles of the other triangle.

From the question:

BD ≅ BD (reflexive property of equality)

Since BD is the angle bisector of ∠ABC, hence ∠ABD = ∠CBD

∠ABD = 2x + y, ∠CBD = 14 + y. Therefore:

2x + y = 14 + y

2x = 14 + y - y

2x = 14

x = 14 / 2

x = 7

Also, ∠BAD = ∠BCD = 90° (right angled triangle)

Since ∠BAD = ∠BCD, BD ≅ BD and ∠ABD = ∠CBD, therefore ΔABD is congruent to ΔCBD by angle-angle-side congruence theorem.

The angle-angle-side congruence theorem states that if two angles and one side of one triangle is equal to two angles and one side of another triangle the both triangles are congruent.

ΔABD is congruent to ΔCBD, therefore AD = CD

5x - y = x + 13y

13y + y = 5x - x

14y = 4x

14y = 4(7)

y = 4(7) / 14

y = 2

7 0
3 years ago
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