Crossword 3

1. apparatus: Equipment used in chemical experiments, including beakers, flasks, and test tubes3.
3. Bases that dissolve in water to produce hydroxide ions (OH-) and have a pH greater than 73.
5. Substances that release hydrogen ions (H+) in water and have a pH less than 73.
7. fuels: Hydrocarbons derived from ancient organic matter, including coal, oil, and natural gas3.
8. The application of chemistry to industrial processes, especially the production of food, fuels, and other products1.
10. rocks: Minerals and rocks with high resistance to weathering and erosion3.
11. chemistry: The study of chemical processes in soil, including nutrient availability and pollution1.
15. The study of chemical reactions occurring at specific sites within minerals or crystals1.
17. The study of enzymes and their role in chemical reactions1.
18. scale: A measure of acidity or alkalinity, ranging from 0 to 14, with 7 being neutral3.
20. The systematic study of the natural world, including chemistry1.

2. Ionic compounds formed by the reaction of an acid with a base, consisting of positive and negative ions3.
4. families: Groups of elements with similar properties, such as the alkali metals or halogens3.
6. The study of chemical reactions within cells, often involving staining techniques to visualize cellular components1.
9. The study of the chemical composition of the Earth’s crust and the processes that shape it1.
12. A mystical and ancient practice that aimed to transform base metals into gold or discover the elixir of life1.
13. The study of chemicals produced by animals and their interactions with the environment1.
14. The study of chemical processes and substances that occur within living organisms2.
16. The branch of applied chemistry that deals with fermentation processes, especially in brewing and distilling1.
19. subject: Chemistry is a common subject taught in schools, covering various aspects of matter and its interactions1.