What causes air masses to move? A.) A difference in air pressure and temperature occurs.
B.) Weather conditions change rapidly to produce storms.
C.) A collision takes place between two natural wind patterns.
D.) Long, narrow bands of wind blow in the upper atmosphere.

Correct Answer is D.

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.

the objects have the same charge is correct.

nathan lee