Overnight, a giant spilt icing sugar on the ground,He spilt it in the hedgerows,

and the trees without a sound,He made a wedding-cake of the haystack in the field,

He dredged the countryside and the grass was all concealed,

He sprinkled sugar on the roofs, in patches not too neat,

And in the morning when we woke, the world around was sweet.

Visualization:What do you see, hear, feel, smell,

taste?What is the poem about? How do you

know?

FROST

Questions:

• Where does frost come from?• What state of matter is frost?• How is frost different from dew?• What temperature does it need

to be outside for frost to form?

Vocabulary• Crystal: Solid material that forms in a very

regular pattern.

• Frost: Ice crystals that cover a cold surface when water comes out of the air.

• Deposition: A process when water vapor in the air bypasses the liquid dew phase and goes directly to the solid ice phase.

Dew vs. Frost

Made from liquid dew droplets

Made from solid ice crystals

Both come

from the air and form on

cold surfaces

over night

Making Frost• Materials: 1 tin can per group, water, ice, salt thermometer,

craft sticks• Procedure:1. Fill the tin can halfway with cold water.2. Measure and record the temperature in your science

notebook.3. Fill the can with ice and pour in a handful of salt. 4. Stir the mixture continuously with the thermometer.5. After a layer of ice forms on the can , record the

temperature in your science notebook.6. Use sticks to scrape off the frost and record observations in

your science notebook. Watch the frost slowly melt as the ice water warms up.

Reflect and Discuss (TM 202)

• What happened to the can?• Where did the ice on the outside of the can

come from?• How did the frost form?• What time of day or night is frost more likely

to form?• What time of year does frost occur?

Science Journal

• Frost is a collection of ice crystals that comes from the water vapor in air and forms on the surface of the can

• Draw a picture that illustrates the above definition.

• Label your picture: water vapor ice crystal, thermometer temperature ice