He spilt it in the hedgerows and the trees without a sound He made a weddingcake 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 ID: 508118
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Slide1
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?Slide2
FROSTSlide3
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?Slide4
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. Slide5
Dew vs. Frost
Made from liquid dew droplets
Made from solid ice
c
rystals
Both come from the air and form on cold surfaces over nightSlide6
Making Frost
Materials: 1 tin can per group, water, ice, salt thermometer, craft sticks
Procedure:Fill the tin can halfway with cold water.
Measure and record the temperature in your science notebook.Fill the can with ice and pour in a handful of salt. Stir the mixture continuously with the thermometer.After a layer of ice forms on the can , record the temperature in your science notebook.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.Slide7
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?Slide8
Science Journal
Frost is a collection of ice crystals that comes from the water vapor in air and forms on the surface of the canDraw a picture that illustrates the above definition.Label your picture: water vapor
ice crystal,
thermometer temperature ice