Signed is the past tense of sign, but usually meaning signing your name as a signature. For example, "I signed for the parcel" or "I have a signed warrant".
Silence is the state of there being no noise. When it is very quiet you might say there is silence.
You may also use silence in terms of nobody talking about something for some time. For example "The celebrity is back in the media after a time of silence".
Sis forSilhouette
Scientific name: bombyx mori
Silkworms are caterpillars that grow up into silkmoths. They live almost entirely on mulberry leaves. The cocoon they make can be used to make silk, a very attractive cloth that has been valued for thousands of years. A silkworm cocoon is made from a single strand of silk 1000 to 3000 feet long, and it takes 2000-3000 cocoons to make a pound of silk. The caterpillar in the cocoon is not allowed to emerge by itself, as this would damage the silk. The cocoons are boiled with the caterpillar inside.
A silo is a large cylindrical structure for storing a large amount of something. Silos are most often seen near farms for storing grain, but can also be used to store coal, wood chips or even missiles.