84 FROST 



SUPPLEMENTARY WORK 



What Frost is. — Frost is not frozen dewdrops, for dew 

 would freeze in solid balls. It does not fall from the air like 

 snow, for then it would cover everything alike, and would not 

 cling closely to things. It is made from vapor that becomes 

 ice when it touches anything freezing cold. Are the particles 

 of frost like needles of ice ? Are they like snowflakes ? 



Shapes of Frost. — Look at frost on different days. Have 

 its particles the same shape every day ? Does the frost on a 

 board look like the frost on the grass ? You may have seen 

 rosettes of frost on a tin roof. Are these rosettes like the 

 rosettes of ice that form on a wet board ? 



When it becomes cold while a fog is in the air, the trees 

 and weeds are often coated with a delicate white frost so that 

 each twig seems covered with downy feathers. This feathery 

 frost often forms on bushes that overhang a running stream. 

 What is the shape of its separate particles ? 



Plants in Frosty Weather. — How does freezing affect most 

 leaves and flowers ? 



What kinds of garden vegetables are not harmed by frost ? 

 What kinds of green leaves can you find in the middle of 

 winter on the school grounds ? What kind can you find in 

 gardens and fields ? How does a catnip plant look in winter ? 

 Does wheat keep green through the winter ? Do turnips 

 that have been left in the ground keep green tops ? Does 

 lawn grass show any living part above ground in winter ? 



In winter you may often see mullein plants with green 

 leaves spread out in rosettes on the ground. Notice the 

 thickness of these winter leaves. They contain food ready 

 made for new shoots to use on the first warm days of spring, 

 and next summer all that will be left of them will be dried 

 skins. What other rosettes of leaves have you seen in winter ? 



Notice a dandelion plant in winter. How large are its 

 winter leaves ? 



