Five major.
From lowest to highest, the major layers are the troposphere, stratosphere, mesosphere, thermosphere and exosphere. Troposphere.
They occur in patterns because certain features are formed at the site of the three types of plate boundaries.
Answer: 4.56 Joules
Explanation:-
The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

Q = Heat absorbed = ?
m= mass of substance = 2.5 g
c = specific heat capacity = 
Initial temperature =
= 25.0°C
Final temperature =
= 29.9°C
Change in temperature ,
Putting in the values, we get:


The heat absorbed by gallium must be 4.56 Joules
Its doesn't dissolve in water!
Answer:
No more than 0.1 mL of hydrochloricton acid