Question

brainpop / assignment / snowflakes
1.
2.
3.
4.
ice crystal
water molecule
snowflake
hydrogen atom

Explanation:

To solve this, we need to order the terms from the smallest (atom) to the largest (snowflake) based on their size and structural hierarchy:

1. Hydrogen atom: Atoms are the smallest units of matter here. A water molecule is made of atoms (hydrogen and oxygen), so hydrogen atom is the smallest.
2. Water molecule: A water molecule ($H_2O$) is made of hydrogen and oxygen atoms, so it’s larger than a hydrogen atom but smaller than an ice crystal or snowflake.
3. Ice crystal: Ice crystals are made of many water molecules arranged in a lattice. They are larger than individual water molecules but smaller than a snowflake (which is a collection of ice crystals).
4. Snowflake: A snowflake is a visible structure made of multiple ice crystals, so it’s the largest.

Answer:

1. Hydrogen atom
2. Water molecule
3. Ice crystal
4. Snowflake