The
two categories that are used to classify physical changes are Reversible and
Irreversible.
Reversible
means that the matter can convert to gas, liquid and solid and then convert
back to gas, liquid or solid. So it means it can convert back and forth.
<span>Irreversible
means that matter cannot be converted back as it is before.</span>
Answer:
The correct answer will be- Option-A
Explanation:
The Theory of Island Biogeography was proposed by the MacArthur and Wilson's in 1967 which proposed that the number of species-immigration and extinction rates are determined by the size of the island and distance of the island from the mainland.
The suggestions made by them are:
1. The islands which remain farther from the mainland receive very few species as compared to the closest mainland.
2. Smaller island shows a high rate of species extinction as compared to the larger island.
Thus, option-A is the correct answer.
Answer:
The Size of the Sun and the Moon
In absolute terms, the Sun and the Moon couldn't be more different in size. The Sun measures 1.4 million km across, while the Moon is a mere 3,474 km across. In other words, the Sun is roughly 400 times larger than the Moon
Explanation:
Answer:
Aquaculture and fishing are different from each other in many aspects.
Explanation:
Aquaculture can be defined as the process of cultivation of both the aquatic plants and animals, where as Fishing can be defined as catching or harvesting different fishes only. Aquaculture can be of two types- Marine water and fresh water aquaculture. Aquaculture increased the production of food for the consumption of human and also increase the national import level. Fisheries generally deals with catching and selling fishes. Main point that can be noted is- pearls can be gained only through the process of aquaculture not through fishing.
