Answer:
C. Atoms can be used over and over in different molecules
Explanation:
When different compounds enter the stomach, they undergo a series of chemical reactions and are broken down. They are then used for new metabolic processes. For example, if glucose was broken down into pure Carbons, they could then react and form other molecules as needed by the body.
Answer:
A metallic bond of copper atoms with metallic bond of tin atoms to form metallic bond.
Explanation:
Metallic bond is a type of bond that is formed between positively charged atoms in which there is sharing of electrons between them.
Metallic bonds are formed between metal atoms. When metal atoms unite, they share electrons among themselves and each one of them has valence electrons.
Bronze is an alloy of metals and it consist of copper and tin which makes them to be bonded by metallic bond.
Answer:
Option (A)
Explanation:
Upwelling usually refers to the rising up of denser, deep-sea cold water to the surface of the ocean, replacing the less dense warm air.
It takes place both near the coastal areas and in the broad open ocean.
The deeper cold water is highly rich in the valuable nutrients, and as they rise up they carry these nutrients and distribute them in the upper region of the ocean water body. The marine organisms are directly dependent on these nutrients, thereby helps in biological productivity.
Thus, the intense upwelling occurring in a particular area in the ocean signifies the abundance of marine species.
Hence, the correct answer is option (A).
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Answer:
Big Bang, the universe is still expanding. Slowly the planets get further away from each other. It's the third planet from the sun, some believed that the earth was in the center of the universe and now we believe the sun is in the middle.Explanation:
