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Monitoring living organismsthe more concentration of salt there is, the less growth of the seeds will happen, but if there is less concentration of salt, then the seeds.

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Unit 3 - Monitoring living organisms Salinisation Risk assessment: For this experiment, there are no real dangers or hazards that have to be identified, as I am only monitoring the growth of seeds. This experiment involves no harmful substances that I would have been aware of. Provided that I take care of how I conduct and monitor this experiment, there should be no problems. Method: To start the experiment, I had to get an egg box that had six holes, so that I could plant the seeds in each 1. In each egg hole, I had planted 10 seeds to make to a fair test. For each egg hole, I had numbered them one to six, so them I would know which one is which when it came to the monitoring. In all of the egg-holes, I had put cotton wool. When those were placed into the egg holes, then I put the ten cress seeds on top of them. When I had done that, I measured out 1 litre of tap water and poured it into a measuring jug. Then, I had added 50 grams of salt to the tap water and stirred it thoroughly until all of the salt had dissolved. ...read more.


No growth. Day 7: Wet in the morning, sunny in late morning and remaining dry throughout the day. Growth occurring. Egg-hole 4 with the most growth of 1 cm, egg-hole 3 with 0.7cm of growth, egg-hole 5 with 0.6cm of growth, and egg-hole 2 with 0.2cm of growth. Egg-holes: 6 and 1 with no growth. Day 8: Cloudy in the morning, sunshine in the afternoon, then cloudy in the evening. Growth occurring. Egg-hole 1 = No growth, egg-hole 2 now 0.4cm, egg-hole 3 now 1.4cm, egg-hole 4 now 2cm, egg-hole 5 now 1.1cm and egg-hole 6 = No growth. Day 9: Rain in the morning, then sunshine throughout the day. Growth occurring. Egg-hole 1 = No growth, egg-hole 2 now 0.6cm, egg-hole 3 now 1.8cm, egg-hole 4 now 3.5 cm, egg-hole 5 now 1.5cm and egg-hole 6 = No growth. Day 10: Damp and cloudy in the morning, but clearing up with sunshine for the rest of the day. More growth occurring. Egg-hole 1 = No growth, egg-hole 2 now 0.8cm, egg-hole 3 now 2.4cm, egg-hole 4 now 4.2cm, egg-hole 5 now 1.8cm and egg-hole 6 now 0.2cm. Day 11: Cloudy and dry throughout the day. More growth occurring. Egg-hole 1 now 0.1cm, egg-hole 2 now 1cm, egg-hole 3 now 3.2cm, egg-hole 4 now 5cm, egg-hole 5 now 2cm and egg-hole 6 now 0.4cm. ...read more.


This is the same for necrosis, as the seeds would start to swell up and burst, or go black. Evaluation: Although the experiment has finished, there could have been a few alteration to have made the experiment more reliable. Firstly, I could have used tissue paper, or soil to then show what effects would happen if it was in a different type of 'environment'. By doing this, this would show the different type of germination of which type of material that would have been used. If 4 was used for soil, 4 used for tissue paper, and 4 used for cotton wool, then, I would have definitely got a more reliable and clearer result of the effects of different concentration of salt would do to different materials. Monitoring is important to measure the rate of germination of plants because; this then allows people and me to have accurate results, by it showing the progress of the seeds at certain times when the monitoring is taken place. If the monitoring is taken after every 48 hours, this is then unreliable results, as this wouldn't give a clear reading of how much it had growth at a certain time. Whereas if the monitoring takes place after every 12 hours, this then allows us to have more reliable results, as it would show us the germination after a certain period of time, and allows us to compare the seed germination to the other seeds. ...read more.

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