Earth scientists have identified four distinct layers of the atmosphere. Which of the following defines the layers of the atmosphere? Their density

Their altitude

C. Their temperature

Their air pressure

Most ionic compouds are crystalline solids at room temperature. true falseionic compounds are electrically neutral. true falseionic compounds generally have low melting points. true falsewhen melted, ionic compounds do not conduct electricity. true falsethe electrostatic attraction between an anion and a cation is an ionic bond. true false