Answer first gets brainliest
1. h2o molecules temperatures drop below freezing.
a. bond
b. form crystals
c. create solids
d. all of the above
2. when the ice forms, the hydrogen atoms in a water molecule
a. bond with hydrogen atoms in other water molecules
b. bond together and release the oxygen atom into the air
c. bond with the oxygen atoms in other water molecules
d. combine to form a single, heavier hydrogen atom
3. why is ice less fence than liquid water?

1 is B

Explanation:

Ice is crystalline so when water drops below freezing it forms crystals, I don't know the rest.

1. D

2. C

3. Ice is less dense than water because the orientation of hydrogen bonds causes molecules to push farther apart, which lowers the density. More organized in the solid forms verse the liquid form.

Explanation:

1. When temperatures drop below freezing crystals are formed, and crystals = ice. Ice = solid and there are more bonds in ice than there are in water.

2. When ice forms the hydrogen atoms in a water molecule bond with the oxygen atoms in other water molecules.

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.