Questions

The skeleton of the Great White Shark is made up of cartilage and connective tissue. There are no bones in a white shark's body.

Crystal size in igneous rocks is determined by rate of cooling i.e, the time taken by magma to cool down. 

Hence, the slower the rate of cooling the larger the crystals. The faster the rate of cooling the smaller the crystals.

In an ideal gas, at any particular time, different particles in the gas have different speeds and hence different kinetic energies. This assumption is reasonable because as the particles collide, we expect their speed to change. Even if initial speed of all the particles was same, the molecular collisions will disrupt this uniformity.Hence statement 1 is incorrect and 2 is correct.

Disposable income is the amount of money that households have available for spending and saving after income taxes have been accounted for.

A decline in disposable income means a movement down along an economy's consumption schedule.