Answer: The correct answer is iron and nickel.
Earth's core is the hottest and deepest layer. It is made of two layers The outer core which forms the border of mantle and inner core is spherical ball which is made up of metal. The outer core is about 1400 miles thick and it is made up of combination of alloys (iron and nickel). Some other metals are also found there in trace amounts like uranium, platinum and gold.In the outer core these metals are found in solid form.
The Earth's core is primarily composed of an alloy of iron and nickel. This combination is known as the "iron-nickel alloy" or sometimes referred to as "nickel-iron alloy."
The correct option is A .
In general ,The outer core is believed to be mostly liquid, while the inner core is solid, and both are predominantly made up of this iron-nickel alloy. This composition is based on scientific studies and evidence gathered from seismic waves, meteorite analysis, and other geological observations.
One key observation is the existence of primary (P) and secondary (S) seismic waves.P-waves are compressional waves that can travel through solid and liquid materials, while S-waves are shear waves that can only propagate through solid materials. By analyzing the behavior of P and S waves, scientists have determined that the Earth's core has an outer liquid layer and an inner solid layer.
Hence , A is the correct option
To learn more about Earth’s core, here
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During intense exertion or activity involving the muscles, there arises a need for a sudden short term burst of energy. This need for energy is so demanding that it cannot be satisfied through the normal mechanism whereby energy is supplied through aerobic respiration using oxygen.
Therefore the muscle cells must rely on other mechanisms that do not rely on oxygen to fuel muscle contraction and this is where they resort to anaerobic respiration which uses pyruvate to play the role of oxygen as the final electron acceptor. In the process, pyruvate accepts an electron and is reduced to lactic acid in the muscle tissues.
B)G0 phase
C)Anaphase
D)Meiosis II
The right option is; B) G0 phase
Neurons are in the G0 phase.
The G0 phase is a stage in the cell cycle in which cells do not divide or prepare for division but continue to carry out its normal functions for the rest of the organism's life. This phase is the resting phase of the cell and it is seen either as an extended G1 phase or a different stage that occurs outside of the cell cycle. Cells in the G0 phase include neurons, liver cells and heart muscle cells.
a long-sleeved shirt, safety glasses, protective gloves, and closed shoes
a lab coat, safety glasses, protective gloves, and sandals
a lab coat, safety glasses, protective gloves, and closed shoes
Answer: Option (d) is the correct answer.
Explanation:
In a laboratory, while performing an experiment it is necessary to follow necessary safety measures so that any misshapen may not result in a serious injury.
Therefore, when we pour chemicals into a beaker then it is advisable that we should be wearing safety glasses so that any spurting won't let the chemical to enter in our eyes. Protective gloves will save our hands from coming directly in contact with the acid.
Whereas a lab-coat and closed shoes will protect our rest of the body from the chemicals.
Thus, we can conclude that a lab coat, safety glasses, protective gloves, and closed shoes is the list of materials to be worn while performing an experiment.
it is the last one :) :) :)
The following statements about paper recycling is not true is Recycling paper can lead to 35% less water pollution.
The benefits of recycling cardboard and derivatives are numerous, these include a reduction in the consumption of water used in the production process, in addition, there is a reduction in energy, generating great savings for the company that recycles cardboard and its derivatives.
So the only alternative that is not true is Recycling paper can lead to 35% less water pollution.
See more about Recycling paper at brainly.com/question/9403211
A squirrel eating a nut is a example of a primary consumer gaining energy
Answer: increase understanding not only of the construction of individual genes but also of their relation to each other and to the entire chromosomal structure.
Explanation: The Human Genome Project is using primarily three levels of maps, each of which helps to increase understanding not only of the construction of individual genes but also of their relation to each other and to the entire chromosomal structure.