Answer:
uh well i can guess for you because i think i know,
1. physical change
2. water if heated up can change into a gas.
3.yeah
4.because the two hydrogen or whatever mixed with the one oxygen or whatever created two whatever
im pretty big brain as you can tell.
Explanation:
The best answer that is being described above is the RODS. Along with cones, Rods are one of the photo<span>receptor cells in the retina of the </span>eye. Unlike the cones that help with color vision, the rods focuses more on the gray scale, the reason why we can see everything in a gray scale at night or in a dark environment. Hope this helps.