Which is a difference between gross physical evidence and trace physical evidence?

a. gross physical evidence is easily seen, while trace evidence is very small.

b. gross physical evidence is only found at the scene of a crime, while trace evidence is found on the suspect.

c. gross physical evidence is always liquid, while trace physical evidence is always solid.

d. gross physical evidence is small or tiny, while trace physical evidence is easily seen.

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101