Fluoride, a naturally occurring mineral, helps prevent cavities and can even reverse the earliest stages of tooth damage. Because of its benefits for teeth, fluoride is added to many public water supplies. It's also a common ingredient in toothpaste and mouth rinses
ANSWER: D (Stimulus)is the name for a change in the environment that causes an organism to change its activity
1. Chemical
2. Physical
1. Exothermic
2. Endothermic
1. Chemical
2. Physical
The electron configuration of Nitrogen is
1s ^2 2s ^2 2p^ 3
There are 3 electrons in the 2p sub level of nitrogen.
Inside the ground, different types of rocks and minerals are pressed together. The pressure causes the rocks to go together and form the sediments. Examples of sedimentary rocks are: sandstone, siltstone, and shale.
