TED-Ed: The science of snowflakes - Maruša Bradač

The video explores the unique structure and formation of snowflakes, highlighting their symmetrical six-sided shapes. Unlike ice cubes, snowflakes form directly from water vapor turning into ice. The video delves into the physics of water molecules, explaining covalent and hydrogen bonds that lead to snowflakes' hexagonal structure. It discusses how atmospheric conditions like temperature and humidity influence snowflake growth and their impact on activities like skiing. Despite their symmetry, no two snowflakes are identical due to varying environmental factors, a mystery still being studied by scientists.

What distinguishes a snowflake from an ice cube in terms of formation?

• Ice cubes form from water vapor condensing into liquid.

• Ice cubes form from water vapor turning directly into ice.

• Snowflakes form from water vapor turning directly into ice.

• Snowflakes form from liquid water freezing.

What type of bond is formed between the oxygen of one water molecule and the hydrogen of another?

• Covalent bond

• Hydrogen bond

• Metallic bond

• Ionic bond

What is the angle between the hydrogen atoms in a water molecule?

• 180 degrees

• 120 degrees

• 104.5 degrees

• 90 degrees

How do atmospheric conditions influence the shape of a snowflake?

• They determine the symmetry and branching of snowflakes.

• They cause snowflakes to melt before reaching the ground.

• They have no effect on snowflake shape.

• They make all snowflakes identical.

Why is completely dry snow difficult to ski on?

• It is too soft and powdery.

• It is too slippery.

• It melts too quickly.

• It creates too much friction with the ski surface.