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## The World of Snowflakes

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**The Water Cycle**evaporation**condensation**The Water Cycle evaporation**condensation**The Water Cycle precipitation evaporation**Snowflakes form at the condensation stage.**The Water Cycle**Snowflakes form at the condensation stage.**The Water Cycle The water vapor condenses directly into ice!**Snowflakes form at the condensation stage.**The Water Cycle This process is called “sublimation.” The water vapor condenses directly into ice!**Every snowflake starts out as the same basic shape.By the**time each snowflake touches the ground, it isunique. Why?**Weather conditions within the cloud...**temperature**Weather conditions within the cloud...**temperature Temperature: the measurement of how hot or cold something is.**Weather conditions within the cloud...**humidity Humidity: the amount of water vapor in the air.**Conditions in the atmosphere as the snowflakes**fall to the ground.**Properties of a Snowflake**• A snowflake is made of ice crystals.**Properties of a Snowflake**• A snowflake is made of ice crystals. • A snowflake is tiny.**Properties of a Snowflake**• A snowflake is made of ice crystals. • A snowflake is tiny.**Properties of a Snowflake**• A snowflake is made of ice crystals. • A snowflake is tiny. • A snowflake is symmetrical.**Symmetry – Two Dimensional Polygons**Key words:**Symmetry – Two Dimensional Polygons**Key words: A regular polygon is a polygon in which all sides are the same length.**Symmetry – Two Dimensional Polygons**Key words: A regular polygon is a polygon in which all sides are the same length. A line of symmetry for a polygon is any line on which the polygon can be folded so that one half of the polygon will fall exactly on the other half.**How many lines of symmetry does Snowflake 1 have?**__________ How many lines of symmetry does Snowflake 2 have? __________ What regular polygons are these snowflakes? __________________**Properties of a Snowflake**• A snowflake is made of ice crystals. • A snowflake is tiny. • A snowflake is symmetrical.**Properties of a Snowflake**• A snowflake is made of ice crystals. • A snowflake is tiny. • A snowflake is symmetrical. • A snowflake is 3 dimensional.**2-Dimensional & 3-Dimensional Objects**Circle Sphere**2-Dimensional & 3-Dimensional Objects**Square Cube**2-Dimensional & 3-Dimensional Objects**Triangle Triangular Prism**2-Dimensional & 3-Dimensional Objects**Rectangle**2-Dimensional & 3-Dimensional Objects**Rectangle Rectangular Prism**2-Dimensional & 3-Dimensional Objects**Hexagon Hexagonal Prism**Every snowflake starts out as the same basic shape – a**hexagonal prism. Why?