1. Explain polarity.
2. How is polarity related to surface tension ?
3. What does soap do to the surface tension of water?
4. How is polarity related to capillary attraction?
5. Give two examples of places where water moves upward by capillary attraction in nature.
6. Why does water rise higher in thinner capillary tubes?
7. How does polarity affect solubility?
8. Give examples of nutrients that are dissolved in lakes, rivers, and the ocean.
9. Describe a soap molecule's ability to dissolve water and oil.
10. Describe the phase changes that occur in the water cycle
11. How does freezing water contribute to the weathering of rocks?
12. Define density.
13. What causes ocean currents?
14. How does a fish's swim bladder affect its ability to change depths?
15. Why does ice float?
16. In which phase is water the most dense? the least dense?
17. Explain how detergents are related to eutrophication.
18. Why is water called the "universal solvent"?
2007-08-07 16:15:51 · 5 answers · asked by monkey 2 in Science & Mathematics ➔ Earth Sciences & Geology
1.Explain polarity.
Polarity is also related to solubility. Polar substances can dissolve other polar substances. Non-polar substances dissolve other non-polar substances. Polar substances and non-polar substances, however, do not mix.
2.How is polarity related to surface tension?
Cohesion of water also causes surface tension, water's invisible skin which allows water striders to walk on water. Polarity is also related to solubility. (This is the best I can do with this)
3.What does soap do to the surface tension of water?
While one end of a soap molecule dissolves in water, the other dissolves in oil. This special dual ability of soap permits it to break up dirt so it can be removed easily. The polar end of the soap molecule dissolves in the water while the non-polar end dissolves in the oil. In this way, the oil is broken into droplets, surrounded by soap molecules, and dispersed. The droplets of oil do not merge together because the polar ends of the soap molecules have similar charges and repel each other. Because soap does not work very well in hard water, phosphates are often added to laundry detergents.
4.How is polarity related to capillary attraction?
Cohesion of water causes capillary attraction, the ability of water to move uphill in small spaces. Water will move up the fibers of a plant because of cohesion. This force helps plants get the water they need to survive. In addition, it moves water upwards in soil. Cohesion of water also causes surface tension, water's invisible skin which allows water striders to walk on water.
5.Give two examples of places where water moves upward by capillary attraction in nature. Cohesion of water also causes surface tension, water's invisible skin which allows water striders to walk on water.
6.Why does water rise higher in thinner capillary tubes?
it is less dense
7.How does polarity affect solubility?
Polar substances can dissolve other polar substances
8.Give examples of nutrients that are dissolved in lakes, rivers, and the ocean.
Phosphates and nitrates are nutrients that algae use for growth.
9.Describe a soap molecule's ability to dissolve water and oil.
While one end of a soap molecule dissolves in water, the other dissolves in oil. This special dual ability of soap permits it to break up dirt so it can be removed easily. The polar end of the soap molecule dissolves in the water while the non-polar end dissolves in the oil. In this way, the oil is broken into droplets, surrounded by soap molecules, and dispersed. The droplets of oil do not merge together because the polar ends of the soap molecules have similar charges and repel each other. Because soap does not work very well in hard water, phosphates are often added to laundry detergents. The addition of phosphates to lakes can initiate the process of eutrophication.
10.Describe the phase changes that occur in the water cycle
Sublimation, the phase change between solid and gas
11.How does freezing water contribute to the weathering of rocks?
When water is trapped in small cracks in rocks, it will expand as it freezes and break up the rock causing weathering
12.Define density.
is a physical property of matter, as each element and compound has a unique density associated with it. Density defined in a qualitative manner as the measure of the relative "heaviness" of objects with a constant volume.
13.What causes ocean currents?
When the algae bloom dies off, it will sink to the bottom of the lake because it is more dense than water. In the same way cold water and salty water tend to sink to the bottom because of their density. This is a major cause of deep ocean currents. When ice freezes near the poles, the salt concentrates in the liquid water of the ocean. The remaining water becomes more salty and therefore more dense. The dense, salty water sinks deep into the ocean and creates a current. The density of water increases with depth
14.How does a fish's swim bladder affect its ability to change depths? When the bladder is full which is less dence the fish will rise towards the surrface. when it is empty it will sink. Most fish have a swim bladder, a special sac that is filled with gases from their blood
15.Why does ice float?
it is less dense than water.
16.In which phase is water the most dense? liquid form
the least dense? Solid form (ice)
17.Explain how detergents are related to eutrophication.
eutrophication, is set in motion when excessive amounts of phosphates and nitrates enter the natural ecosystem. Some sources of these dissolved nutrients include raw sewage, fertilizer run off, detergents, and animal wastes
18.Why is water called the "universal solvent"?
able to dissolve a wide variety of substances
I wish you luck
2007-08-07 16:23:56 · answer #1 · answered by Kristenite’s Back! 7 · 5⤊ 0⤋
1
2017-03-01 04:55:24 · answer #2 · answered by ? 3 · 0⤊ 0⤋
omfg, so easy!
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2007-08-07 16:33:41 · answer #3 · answered by Anonymous · 6⤊ 2⤋
wow. Ten points for answering for one question with 18 parts. or i could go answer 18 questions separately, earning 2 pts each, for 36 points.
2007-08-07 16:19:43 · answer #4 · answered by jawajames 5 · 5⤊ 2⤋
do you're own homework
2007-08-07 16:23:58 · answer #5 · answered by Anonymous · 3⤊ 3⤋