This fact sheet answers the most frequently asked health questions (FAQs) about perchlorates. For more information, call the ATSDR Information Center at 1-800-232-4636. This fact sheet is one in a series of summaries about hazardous substances and their health effects.erchlorates are colorless salts that have no odor. There are five perchlorate salts that are manufactured in large amounts: magnesium perchlorate, potassium perchlorate, ammonium perchlorate, sodium perchlorate, and lithium perchlorate. Perchlorate salts are solids that dissolve easily in water.
Instructions. 1  1. First of all, start with few and easy sign languages. Introducing too many signs at one time will be a useless effort. 2  2. Introduce the signs to your children in such a way as âyou say the word.â It helps in associating the word with the sign language.
Video: Tree in Baby Sign Language. Signing: The sign for tree looks like a tree waving above the ground. To make the tree sign, take your weak hand and extend it flat across your body to make the ground. Then take your strong hand and stand it up at right angles, with your fingers extended and shaking them back and forth. Figure: Tree in Baby Sign Language. Usage: When you go out and look out onto the garden, make the tree sign when showing your baby a tree. Help make the experience more vivid by letting your baby feel the bark of the tree and play with some leaves.