Answer:
F. The mesosphere contains fewer oxygen molecules than the stratosphere.
Explanation:
The layers of the atmosphere are divided into:
1. Troposphere
2. Stratosphere
3. Mesosphere
4. Thermosphere
5. Exosphere
The troposphere extends from the earth surface to about 10km upwards. This is the region of the greatest atmospheric pressure and where all weather conditions arises. In the troposphere, the higher one goes the cooler it becomes.
The stratosphere lies on the troposphere and it is about 50km from the top of the troposphere. The stratosphere is the region where ozone, an oxygen molecule, forms a layer. The higher you go in the stratosphere, the warmer it becomes.
The mesosphere is about 90km thick and it has less gas density. It extends from the top of the stratosphere upwards. The gases here are sparse and atmospheric pressure is lesser than that of the surface. Here, the higher you go in the mesosphere, the cooler it becomes.
Only option F is correct: the mesosphere contains fewer oxygen molecules than the stratosphere.
Answer:
Biodiversity decline continues due to a rapidly expanding human population. Habitat is damaged in order to meet growing needs for agriculture, urban development, water and materials. Fish, wildlife and plants are overharvested, despite mounting evidence that many harvesting practices are unsustainable.
What is the unit c denotes here
Answer: 3.2
Explanation:
pH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydrogen ion concentration.
![pH=-\log [H_3O^+]](https://tex.z-dn.net/?f=pH%3D-%5Clog%20%5BH_3O%5E%2B%5D)
Thus as pH and 
are inversely related, a solution having lower pH will have more amount of concentration. And a solution having more pH will have less amount of concentration.
Thus the solution with lowest pH of 3.2 will have highest hydronium ion concentration.
