Answer:
Physical change
Any change to the physical properties of a substance is called a physical change.
Physical changes are usually reversible as no new substance is formed. It is the same substance but with changed physical properties.
Chemical change
A change in which one or more new substances are formed is called as a chemical change.
Usually a chemical change involves a chemical reaction, which forms new products.
Example : Rusting of Iron, or burning wood.
Explanation:
have a good day <3 sorry i could answer q1 only ill think baout the others..
Chewing bread, tearing paper, breaking rocks
Answer:
A. Nitrogen, Oxygen, and Argon
Explanation:
Hope this helps!
If not, I am sorry.
Answer:
A watershed is a region obtaining both land and water. This is a shallow land region which accumulates water from drainage obtain from different sources like lake, river and pond. A watershed may also develop in a forest ecosystem. The clear cutting of forest will result expose more amount of soil nutrients for erosion by water as compared to natural forest. Therefore, nutrient loss will be higher in clear- cut watershed than natural forest watershed.
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.
