Also, copper may leach from pipes, and it is deadly to marine invertebrates (Goldstein 8). This leaves very few options for water to the hobbyist. One of the last, and probably the best option for obtaining a pure water source is by using reverse osmosis water. Reverse osmosis is a process of filtering ... ... middle of paper ... ...k monitoring water conditions and lighting quickly becomes only a minor chore as the aquarium begins to regulate itself. Considering the amount of work and money a fireplace requires, the aquarium is a much easier and cheaper centerpiece that can be added to any room.
Bottlenose dolphins are not endangered but can become endangered. T... ... middle of paper ... ...ey are shaped with no drag and can cut through the water very fast (Monterey Bay Aquarium). Bottle nose dolphins can dive down to 150 feet to get their food but it really depends on where they live and in what ocean. When a dolphin dives their heart and brain get supplied with oxygen and blood more than the tissue or any other part of their body. Dolphins have a slower heart beat when diving so they can’t dive as deep and as fast as other mammals.
We then remove the supernatant into a beaker, and discarded the sediment. Using a 1:4 ratio mixture of the supernatant and deionized water, we made a stock solution. We then tested the stock solution’s absorbance with a spectrophotometer, and place 1 mL of the solution into separate test tubes. Next we added an additional 4 mL of pH solutions in the 2-11 range into each test tube. After mixing, we tested the absorbance for each solution using a spectrophotometer.
With paper, or plastic, or aluminium foil, , rays are used, because , will not go through the paper. We choose a source with a long half-life so that it does not need to be replaced often. Sterilising Even after it has been packaged, gamma rays can be used to kill bacteria, mould and insects in food. This process prolongs the shelf-life of the food, but sometimes changes the taste. Gamma rays are also used to sterilise hospital equipment, especially plastic syringes that would be damaged if heated.
The Ozone layer is depleting due to man made chemicals we use everyday; this depletion causes an increase in the risk of someone developing skin cancer, and is potentially life-threatening. The ozone layer is a gas that protects the earth from the dangerous UV rays emitted from the sun. (Freedman, page 2934) Due to man made chemicals, the ozone layer is depleting which causes many problems for sustainable life on earth. The rays entering the earth’s stratosphere without the ozone layer will cause damage to many things, such as someone’s eyes or immune system, aquatic life, or plants. Another one of the consequences of ozone layer depletion is that it will cause an increase in the risk of developing skin cancer.
Greater exposure to ultraviolet rays also affects the DNA of organisms. The radiation has the ability to reach the DNA and alter its structure. This can impair the organisms immune system, cause stunted growth, as well as increase the risk of cancer (Dolan 260). As well, micro-organisms in the soil which produce nutrients, can die from over-exposure to ultraviolet rays, resulting in soil infertility. The Ozone Layer The ozone layer shields the Earth and its inhabitants from the sun’s harmful ultraviolet rays.
The ozone layer is very small and society the way it is now will keep depleting this very small ozone layer. Today society tries to be more eco-friendly but it needs to change quickly before it is too late. This project shows also what can happen if society changed drastically to a more eco friendly solution like wind power, or solar energy. The depletion of the ozone can cause global warming, cancer, mutations, sun burn, melanoma and more. “Laboratory and epidemiological studies demonstrate that UVB causes melanoma skin cancer and plays a major role in malignant melanoma development.
The first is through ballast water, the water carried in the bellies of the enormous transport ships of intercontinental trade (Whitney, 2003). Larval lionfish have low oxygen and food needs which makes surviving movement in ballast water a possibility (Whitney, 2003). The second possibility is that a number of... ... middle of paper ... ...rough an attempt to overfish the species is unlikely due to their ability to quickly recover (Barbour, 2011). A substantial reduction of adult abundance will require a long-term commitment and may be feasible only in small, localized areas where annual exploitation can be intense over multiple consecutive years (Barbour, 2011). Lionfish are not currently listed as threatened in their native range.
As you begin to pour the test tube of Hydrochloric Acid contence into the beaker start the stop clock 6. When the cross on the paper becomes obscured stop the clock and record the result 7. Rinse out the beaker where the reaction took place 8. Repeat with five different temperatures, using ice to cool down the Sodium Thiosuphate, and repeat it all twice. The equipment I will use is: · Hydrochloric acid · Sodium Thiosuphate · 2 x Measuring cylinders · 2 x Test tubes · stop clock · 2 glass beakers · 2 thermometers · Bunsen burner · water · tripod · heat mat · gauge · paper with pencil cross I will make sure my results are accurate by referring to graphs, e.g.