Even carbon dioxide can dissolve in the groundwater, causing the water to be naturally carbonated. This water is sometimes sold as mineral water. Groundwater can be heated by magma below the Earth's surface. The heated water can create hot springs, springs with water that is naturally hot (Figure 13.23). Some hot springs are used as natural hot tubs and are considered therapeutic and spiritual by some people. However, hot springs can be dangerous, too.
We used a level tablespoon of salt in a cup of water. The batteries we have shown here are more correctly called cells. An actual battery is made up of two or more cells. The zinc-air cell produces about three quarters of a volt.
It is from morphine that heroin is made. Morphine is made into heroin with a chemical reaction containing the chemical compound acetic anhydride. The heroin is then purified using chemical or mechanical means.pium and morphine, from which heroin is made, come from a variety of sources: 1  Afghanistan-leading illegal opium and heroin exporter producing up to 82% of the world's supply. 2  Pakistan, Southeast Asia, South America-other illegal sources.