An object is tossed upwards with the same inital velocity on the earth then on the moon. will the maximum height reached be: grater on the earth b) greater in the moon c) the same as on the earth and the moon.

The one tossed upward on the Moon will rise to a greater maximum height before starting to fall. (b)  

It'll also spend more total time in flight before returning to the hand that tossed it. (I almost said it'll spend "more time in the air".  That would be silly on the Moon.)

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =