Question

1. explain how deposition helps a snowflake begin to grow.

Explanation:

Deposition is the phase change from gas (water vapor) to solid (ice) without passing through the liquid phase. In the atmosphere, when water vapor is present and the temperature is below freezing, water vapor molecules can undergo deposition onto a tiny ice crystal (the initial nucleus of a snowflake). These water vapor molecules directly turn into ice, attaching to the ice crystal. As more and more water vapor deposits onto the crystal, the snowflake gains mass and starts to grow in size and develop its intricate, symmetrical structure. The deposition process adds more ice molecules to the existing crystal lattice of the snowflake, allowing it to increase in size as it moves through regions with sufficient water vapor in the atmosphere.

Answer:

Deposition is the phase change of water vapor (gas) to ice (solid) without becoming liquid. In the atmosphere, when water vapor is present at sub - freezing temperatures, it directly deposits onto a tiny ice crystal (the snowflake's nucleus). As more water vapor molecules deposit and attach to the ice crystal, the snowflake gains ice mass, increasing in size and starting its growth.