Answer:
Quantitative observation is an objective collection of data which is primarily focused on numbers and values.
Viscosity is basically how thick a liquid is so pancake syrup would be the answer
A colored line, as long as it is one single piece, not broken
Amplitude is the awnser glad I could help you
Pushing down a piston in an airtight cylinder would tend to increase the pressure in the system since the particle collision and collisions with the walls are now more frequent. Also, pushing further, the gas would undergo a phase change from gas to a liquid.
