Question

1. when are crystals formed?

○ when molecules or atoms are arranged in a regular repeating pattern
○ when lava cools very slowly below earths surface
○ when magma cools above earths surface
○ when molecules and atoms are randomly arranged

Explanation:

Crystals are defined by a regular, repeating arrangement of atoms/molecules. The other options describe specific cases (e.g., slow cooling of lava forms some crystals but is not the general condition for crystal formation; random arrangement forms amorphous solids).

Answer:

when molecules or atoms are arranged in a regular repeating pattern