Ms. Johnson tells the students to make sure they bring their jackets to school tomorrow. She knows that there will be a front of cold air moving in soon because of the change in low-
pressure system caused by jet streams. Which of the following best explains how jet streams influence local weather patterns?
They cause movements of ocean water in a continuous flow.
They can blow from north to south and form along the borders of masses of hot and cold air.
Their path fluctuates to the north or south depending on the location of hot and cold air masses.
They create a force (known as the pressure gradient force) that causes air to move.