Question

1 multiple choice 1 point
in order to generate snow, there has to be moisture in the air that freezes. this is an example of what type of change?
physical change
nuclear change
atmospheric change
chemical change
2 multiple choice 1 point
in the article, it mentioned that snow is the result of frozen water vapor. the water vapor exists because of shared bonds between hydrogen and oxygen. this is what type of bond?
nuclear bond
atomic bond
covalent bond
ionic bond

Explanation:

Question 1

A physical change is a change in which the substance's chemical composition remains the same, only its physical state (like solid, liquid, gas) changes. When moisture (water vapor) freezes to form snow (solid water), it's a change from gas to solid (deposition, a type of physical change) as the chemical formula of water (\(H_2O\)) doesn't change. Nuclear change involves changes in atomic nuclei, atmospheric change is a broader term not specific to chemical/physical, and chemical change involves new substances forming (which isn't the case here as water remains \(H_2O\)).

A covalent bond is formed by the sharing of electrons between atoms. In a water molecule (\(H_2O\)), hydrogen and oxygen share electrons to form covalent bonds. Nuclear bonds are in atomic nuclei, atomic bond is not a standard term, and ionic bonds involve transfer of electrons (not sharing). So the shared bonds between H and O in water vapor are covalent bonds.

Answer:

A. Physical Change

Question 2