Answer:
the ethmoidal sinus is one of the four ethmoidal sinuses
Answer:3 molecules or mass.
Explanation:
The amount of light. He is testing the effects of light, which implies there will be different amounts of light tested to reach a conclusion.
When an atom transfers/ gains a valence electron, it gains either a positive or negative charge. in the Proces, becoming an ion. because of the negative/positive charge the two ions are now attracted to each other.
