Why does the troposphere vary in thickness? A.) Warmer air dissipates into the stratosphere. Cooler air is trapped in the troposphere.

B.) Cooler air contracts lowering the height, warmer air expands raising the altitude.

C.) Water vapor weighs down troposphere and less water vapor cause it to rise higher.

D.) Air turbulence in the troposphere varies the altitude.

helloi think dog cat bunny dog cat bunny dog cat bunny

1 a

2 d

3 a

4 c

explanation:

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.