Inner core was found to be solid after observing the motion of P waves.
Explanation:
Seismologist Inge Lehmann, studied the seismic waves of an earthquake and discovered about inner core in the mantle layer of Earth. She States that there is a boundary of discontinuity between the outer and inner core of Earth.
She studied the travel of secondary and primary waves during an earthquake and how it flows at different shells of Earth's layer which helped her in finding about the inner core of mantle. She observed that the inner core is a solid layer inside the molten layer of outer core
Answer:
Too much cortisol can cause some of the hallmark signs of Cushing syndrome
The apple pudding which is prepared by the combination of the sugar, apples, lemon juice, and butter belongs to the category of mixture. Since, multiple substances are included in the apple pudding recipe, it falls under the category of elements. A mixture can be defined as the substance which is formed by the mixing of the two or more than two substances. A compound can be defined as anything which is composed of two or more than two elements. . On the other hand, an element can be defined as the substance which have the same atoms present in it. Atom is the smallest constituent having chemical properties. and a group of atoms is known as molecules. Hence, an apple pudding is a mixture.
The correct answer is d. 3.5 billion years.
Prokaryotes were the first forms of life on Earth long before simple multicellular life appeared because of their ability to withstand extreme conditions. It is believed that the first living forms were bacteria combined with archaea in the microbial mat (multi-layered sheet).
Answer:
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