What causes air masses to move? A: A difference in air pressure and temperature occurs.
B: Weather conditions change rapidly to produce storms.
C: A collision takes place bahween two natural wind patterns.
D: Long, narrow bands of wind blow in the upper atmosphere.

the answer is A the temperature effects the movement of air by if its warm air it moves up and colder moves down while the pressure effects how fast and the directions it moves

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.