c would be your answer i just took the test
It is known as ISCHEMIA.
Ischemia occur when there is an hindrance in the flow of blood to a particular organ in the body. Because it is the blood that carry oxygen round the body, such an organ will not get adequate supply of oxygen. Ischemia is usually caused by blockage or narrowing of the arteries.
Answer:
Friction: Rubbing your hands together to create heat
Conduction: Putting your body parts over something warm, for example a fire
Radiation: Laying in the sun to soak up the warmth
Answer: Estrogen
Estrogens are hormones also referred to as female sex hormones because these hormones are primary in women. They are produced in the ovaries, adrenal glands, and fat tissues. The function of estrogen in the body is complex—it is essential in the growth and development of female breasts, pubic and armpit hair, and the regulation of the menstrual cycle and reproductive system. It also prepares the reproductive organs for conception and pregnancy. Women have wider hips because of estrogen, too.
A. Earth's magnetic field reverses over time; the changes show that seafloor spreading has taken place over time.
Explanation:
The pattern of the magnetic minerals in seafloor ridges are aligned in a repeating pattern because the earth's magnetic field reverses overtime.
This provides evidence because the changes shows that the sea floor spreading has taken place over time.
- The concept of sea floor spreading was first suggested by Harry Hess in the early 1960's.
- Using sophisticated tools, he was able to discover stripe patterns of magnetic minerals in rocks.
- The earth can be likened to a giant bar magnet
- The geomagnetic field originates from the core where the movement of molten metals induces magnetism.
- In a fresh cooling magma, the metallic minerals are able to align their domains with the prevailing magnetic field.
- At some point the magnetic field is normal with a very strong intensity. At other times the intensity is low and it reverses.
- The minerals keeps track of the changes.
- This leads to striped pattern that has been used to suggest sea floor spreading.
learn more:
Sea floor spreading brainly.com/question/9912731
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