Meaning: The sentence describes how snowballs are thrown through the air.
Choice of Words: Snowballs are balls made of packed snow. "Fly" means to move quickly through the air. "Through" means from one side to the other.
Alternative Expressions
Snowballs are flying in the sky.
Meaning: This sentence means that snowballs are moving through the air up high in the sky.
Choice of Words: The word "are" indicates that something is happening right now. "Flying" means moving through the air, like a bird. "In the sky" means up high, where the clouds are.
Snowballs zoom through the air.
Meaning: This sentence means that the snowballs are moving quickly through the air.
Choice of Words: The word "zoom" means to move quickly. "Through the air" means that the snowballs are moving in the space around us, not touching the ground.
Snowballs sail through the air.
Meaning: This sentence means that the snowballs are moving smoothly and gracefully through the air.
Choice of Words: The word "sail" means to move smoothly and gracefully through the air, like a boat on water. "Through the air" means that the snowballs are moving in the space around us, not touching the ground.