Once the original chemicals are all used up, the battery is dead. If you could reverse the reaction or add more of the original chemicals, you may be able to keep the reaction going. A chemical ...

Students will be able to explain that the parts of an object can be rearranged to create a new object ... objects that can be built from five snap cubes and students build their object. After students ...

For example, we humans are thought to have between 25,000 and 30,000 genes that encode the proteins for all the parts of our bodies. On the other hand, the tiny roundworm Caenorhabditis elegans ...