'''Grade 1''' is silk yarn reeled from the inner layers of the cocoon. It is even in structure, size and color, round, clean and free from adulterated materials. '''Grade 2''' is silk yarn reeled from a combination of the inner and outer layers of the cocoon. It is not even in structure, but is even in size and color, round, clean and free from adulterated materials. '''Grade 3''' is the silk yarn reeled from the outer layer of the cocoon with the addition of the floss from the innermost layer. It may contain some knots. It is round, even in size and color, clean and free from adulterated materials.
three grades of silk are 1 reeled silk 2spun silk 3 nail silk
You need to explain why you have the poor grades in school. You should be very truthful about your poor grades that you received.
add up the three grades then divide by three
Explain to them that grades are a completely inaccurate measurement of how much you know and/or have learned.
This link may help to explain why people don't use spider silk commercially: http://www.articlealley.com/article_756038_54.html
Silk spices and gold
Think about it...When you get F on your grades, your choices, either do your work to get to A..B..C..D on your grades or your teacher will suspended you and you will get in trouble by your parents and explain why you got an F on your grades
The grades that Free Science Fair Projects Network offer for are the elementary grades. These are the grades in public school, from grades three to eight.
it created an electrical charge
porcelain, rice, silk.
The wheel,paper,and silk
trade route