Answer:
Sheep shearing is the process by which the woollen fleece of a sheep is cut off.
Explanation:
The person who removes the sheep's wool is called a shearer.
Copper was discovered in North Africa.
Electrons in an atom are held there by the force of attraction exerted by the positive charge of the nucleus on the negative charge of the electron. Energy is required to remove an electron from atom to overcome this attractive force.
Answer:
Answer A
Explanation:
atmosphere is made up of approx 78% N and 21% O2
