The Water Cycle

Each snowflake begins as a single snow crystal.

 A snow crystal forms in one of two ways, depending on the temperature within the cloud.

Each snowflake begins as a single snow crystal.  A snow crystal forms in one of two ways, depending on the temperature within the cloud. 1.At warmer temperatures, between 32˚ F and -40˚ F, a dust particle within the cloud attracts a water droplet and then the water droplet freezes into a snow crystal.

Each snowflake begins as a single snow crystal.  A snow crystal forms in one of two ways, depending on the temperature within the cloud. 1.At warmer temperatures, between 32˚ F and -40˚ F, a dust particle within the cloud attracts a water droplet and then the water droplet freezes into a snow crystal. 2. At colder temperatures, below -40˚ F, the water vapor condenses into an ice crystal without liquefying.

How is this possible?

Temperature

The warmer the air inside the cloud, the smoother the tips of the snow crystal will be.

Temperature The colder the air inside the cloud, the sharper the tips of the snow crystal will be.

Humidity

The dryer the air inside the cloud, the simpler the snow crystal will be.

Humidity The more humid the air inside the cloud, the more complex the snow crystal will be.

8” x 8” Paper Scissors Standard Ruler Pencil

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Hexagon

Line of Symmetry: a line that cuts an object in half so that the two halves are mirror images of each other.

Material Size Dimension

2-Dimensional & 3-Dimensional Objects

Circle

2-Dimensional & 3-Dimensional Objects CircleSphere

2-Dimensional & 3-Dimensional Objects Square

2-Dimensional & 3-Dimensional Objects SquareCube

2-Dimensional & 3-Dimensional Objects Triangle

2-Dimensional & 3-Dimensional Objects TriangleTriangular Prism

2-Dimensional & 3-Dimensional Objects Rectangle

2-Dimensional & 3-Dimensional Objects RectangleRectangular Prism

2-Dimensional & 3-Dimensional Objects Hexagon

2-Dimensional & 3-Dimensional Objects HexagonHexagonal Prism

18 magnetic bars 12 magnetic balls

Does a hexagonal prism have a line of symmetry?

Why?

1 oxygen molecule 2 hydrogen molecules

Do you see the similarities in shape? crystal lattice formed by frozen water molecules snowflake

Do you see the similarities in shape? crystal lattice formed by frozen water molecules snowflake

a process by which materials build themselves without assistance.

the manipulation of materials at the atomic or molecular level

1 nanometer = 1 billionth of a meter OR 1 nanometer = meters

the manipulation of materials at the atomic or molecular level 1 nanometer = 1 billionth of a meter OR 1 nanometer = meters Example: a strand of hair is 100,000 nanometers across

Example 7

tennis balls Example 7

tennis balls car wax Example 7

tennis balls car wax stain-resistant clothes Example 7

tennis balls car wax stain-resistant clothes Game Boys Example 7

cell phones Example 7

cell phones flexible electronics Example 7

cell phones flexible electronics bandages Example 7

All snowflake images courtesy of