Answer:
It forms from the surface downward toward the parent rock.
Explanation:
A typical soil does not form from the surface downward toward the parent rock.
Soil is formed by the weathering of the parent rock. During weathering, a rock is broken down into smaller fragments by chemical and physical means.
- From the bedrock, as the disintegration proceeds, fine particles of earth are formed.
- This in turn gets mixed with organic matter, water and air to form a full soil profile.
- Soil takes a very long time to form.
Answer: A) Two atoms share electrons so they can fill their outer shells
Explanation: A covalent bond is a type of bond formed by sharing equal number of electrons between two non-metal atoms so that both of them can attain a stable octet or duplet structure of noble gases.
In covalent bonding, there is no loss or gain of electrons between atoms. For example, the formation of chlorine molecule, chlorine atom has seven electrons in its outermost shell, remaining one electron to attain an octet structure of noble gases. Two chlorine atoms share one pair of electron, each chlorine atom donating one electron to form a pair so that each atom in the chlorine molecule attains an octet structure..
Lava is above Earth's surface, magma is below.
