As a bullet travels through the air it slows down due to the air resistance. How does the bullets momentum change as a result?

The momentum will decrease as a result of this.

Explanation:

When the bullet travels through the air, it is very fast when it is released from the gun but later on it slows down. This is because of the resistance of the air. The momentum of the bullet will also decrease since mass is constant so the velocity decreases.

Momentum refers to the quantity of motion that an object has. A sports team that is on the move has the momentum. Momentum can be defined as "mass in motion."