AnswersPBCSD_Grade_Forgiveness_2001310_Earth Space Science_S1_2019Unit Test — Unit testQuestion 7
7
QuizMultiple Choice

Unit Test — Unit test

Question 7 • PBCSD_Grade_Forgiveness_2001310_Earth Space Science_S1_2019

What must occur for air masses to form fronts?

Answer
A
They must increase in strength.
B
They must collide with each other.
C
They must move from west to east.
D
They must create air-pressure differences.
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