Answer:
They consist mainly of iron-nickel metal with small amounts of sulphide and carbide minerals. During the decay of radioactive elements in the early history of the solar system, many asteroids melted and the iron they contained, being dense, sank to the centre to form a metallic core.
Explanation:
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D. fingernails
Skin, hair, and vertebrae are all the outer layer of the body and protect the body. The fingernails aren't part of that.
Similar results in multiple tests of the claim is an example of a scientific claim.
<h3>
What is Scientific claim?</h3>
These are referred to statements which are made based on experimental results in the field of science.
The results gotten must also be similar to a large extent when performed by others in order to ascertain its validity.
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The full question is:
Which factor is found in a scientific claim?
D. Phytoplankton are most efficient
