Answer:
option B
Explanation:
The correct answer is option B
The earth system which includes oceans, rivers, lakes, and glaciers is known as Hydrosphere.
The troposphere is the first layer of atmosphere it extends up to 6 to 7 km.
The atmosphere is the layer of gases present on the earth. The atmosphere is divided into five layers the first layer of atmosphere is the troposphere and the last layer is Exosphere.
The biosphere is the area of the planet where the organism lives, it includes ground, air, water, etc. an example of the biosphere is Earth.
in 1950 there were 4.7 million people if thats' what your looking for
Answer:
3 half live have passed.
Explanation:
After 1 half-life , 500 g of the parent isotope will remain. After 2 half-lives , 250 g of the parent isotope will remain. After 3 half-lives , 125 g of the parent isotope will remain.
Answer:
<h2>Boric acid is considered as weak base because it cannot dissosiate H+ ion easily....</h2>
<h3>Hope it helps.....</h3>
