as salt because it does a great job melting ice‚ but it also damages concrete surfaces over time. How does salt damage concrete surfaces? Salt lowers the pH balance in the concrete. Because it is acidic‚ it weakens the strength of the concrete and increases the sizes of the pores. This allows water and other elements to penetrate the surface. Salt also attracts and retains water‚ absorbing 10% more water into the concrete. When the water freezes in the concrete‚ the pressure of frozen water increases
Premium Water Oxygen Chemistry
Essays for Junior Classes 1. Contents 2. My Home 3. My Brother 4. My Mother 5. My Father 6. My Sister 7. My Bicycle 8. Our Television Set 9. My doll 10. My Room 11. My Class Room 12. My school 13. Our Home Garden 14. The Post Office 15. The Market 16. The Crow 17. The Dog 18. The Cat 19. The Parrot 20. The Peacock 21. The Ostrich 22. The Butterfly 23. The Railway Station 24. Street Beggars 25. Rice 26. Snakes 27. Hobbies 28. Rain 29. The Sea 30. The Rainbow 31. Deserts 32. The Moon 33. The Earth
Premium Snake Coconut Water
How Important is Water?As we all know‚ water is essential for mankind ’s survival. However‚ people seem to believe that our water supply is endless since there is more water than land on this Earth. Water regenerates and is redistributed through evaporation‚ making it seem endlessly renewable. So why worry?Actually‚ only one percent of the world ’s water has the capability of being used by us. About ninety-seven percent is salty seawater‚ and two percent is frozen in glaciers and polar ice caps.
Premium Water supply Water Drought
The short story Star Trek “Space Seed” and is by Gene Roddenberry. The definition for science fiction is fiction based on imagined future scientific or technological advances and major social or environmental changes‚ frequently portraying space or time travel and life on other planets (Homepage Bing). The story is based on a science fiction because it brings up so many different unique technologies. They use a spaceship‚ but it be used to travel at speed of light for a while. It created to be more
Premium Space exploration Mars NASA
Hard Water How can water be hard? Well‚ it can‚ but maybe not in the sense that one would think. Hard water refers to water with dissolved calcium and magnesium ions in it. Rainwater is naturally soft‚ but when the water runs through the ground or over rocks causing erosion‚ calcium and magnesium ions can be easily picked up. Most people prefer hard water to soft water for drinking‚ because the ions are good for you‚ and because soft water leaves a “dry” taste in one’s mouth (1‚2). Big businesses
Premium Water Calcium Soft water
Science 12:008/159:008 Spring 2002 Water Pollution July 22‚ 2005 Water Pollution Pollutant Any substance that does not belong in the natural system and disrupts the natural balance Water Pollution Degradation of water quality in a manner that disrupts/prevents its intended or original use. Surface Water Groundwater MCL and secondary MCL MCL=Maximum Contaminant Level The highest concentration of a pollutant allowed in drinking water by law Concentration above which adverse
Premium Water pollution Water Oxygen
Teaching English as a second language Teaching English as a second language (TESL) refers to teaching English to students whose first language is not English‚ usually offered in a region where English is the dominant language and natural English language immersion situations are adapt to be plentiful. In contrast‚ teaching English as a foreign language (TEFL) refers to teaching English to students whose first language is not English‚ usually in a region where English is not the dominant language
Premium Language acquisition Second language Learning
Introduction……………………………………………………………………..…………p2 What do we need water for………………………………………….………………p2 How much water do we use…………………………………………………………p2 What do we use water for…………………………………………….………………p2 Causes……………………………………………………………………………..……P3-4-5 Conclusion…………………………………………………………………………..………p6 References……………………………………………………………………………..……p6 Water: Why is it the most precious resource and what can be done to preserve and conserve it? Water is the world’s most precious recourse. We need water for everything. We need it to drink
Premium Water resources Water Water crisis
where does the water cycle gets its energy from? the water cycle gets the energy from the sun. why do we need the water cycle? since 97% of the earth is covered by salt water we can not drink it. we can remove salt from water but it could be very expensive. how does water get into oceans? when clouds can’t hold any more water it comes as precipitation and lands in the ocean. what is the water cycle made up of? it is made up of six different traits. condensation‚infiltration‚runoff‚ evaporation‚ precipitation
Premium Water Water cycle
Color Prediction - Alcohol Prediction - Salt Solution Red 30mm 18mm Orange 35mm 21mm Green 38mm 26mm purple 40mm 25mm Marker Color Actual Results - Alcohol Actual Results - Salt Solution Red 50mm 23mm Orange 50mm 41mm Green 26mm 43mm purple 43mm 29mm I saw that the water actually rose faster than the alcohol did through the paper slip. Discussion and Conclusion: A comparison of how each solution (salt water and alcohol) separated the pigments from each
Premium Color Pigment Purple