so i've conducted an experiment to determine whether or not water temperature affects plant growth, and if it does affect plant growth, which temperature is the most effective to increase the growth rate of a plant. it was predicted that the warmer the water, the more effective it will be, however if the water is too hot or too cold, the growth rate will decrease.
to do this, i tested 16 violas, categorised into 4 groups. each group received water with a different temperature. the first group received water measuring 45 degrees celsius, the second 35, the third 25 and the fourth 15. the plants were watered for a period of 14 days. after 14 days, the results were observed and recorded. it was found that the plants which received water measuring 35 degrees celsius had grown the most whilst the plants which received water measuring 15 degrees celsius had grown the least. it was then concluded that warmer water temperatures were the most effective and that very cold water temperatures had little effect.
Wednesday, June 16, 2010
Risk Assessment
HAZARDOUS OR DANGEROUS CHEMICALS TO BE USED:
N/A
SOURCE/S OF SAFETY INFORMATION:
N/A
IDENTIFY THE RISKS:
1. inhalation of soil particles
2. ingestion of soil and/or soil particles
3. slight burn from hot water
ASSESS THE RISKS:
1. when soil is inhaled, it may be lodged in airways, causing breathing problems
2. when soil is ingested, fungi and/or bacteria may accumulate causing health problems.
3. burns may cause redness in skin, and (depending on the sensitivity of the skin) may cause it to peel.
CONTROL THE RISK:
1. wear a mask when handling soil. if possible, wear goggles for extra safety and care.
2. wear a mask and thoroughly wash hands and even fingernails to prevent ingestion of soil
3. wear dish-washing gloves or any water proof gloves and protective facial gear. also, avoiding turning the tap on too fast or too high, as this results in hot water splashing.
DISPOSAL:
1. all materials that are no longer needed can be placed into a garbage bag and be disposed of. For the disposal of water, simply drain the sink.
N/A
SOURCE/S OF SAFETY INFORMATION:
N/A
IDENTIFY THE RISKS:
1. inhalation of soil particles
2. ingestion of soil and/or soil particles
3. slight burn from hot water
ASSESS THE RISKS:
1. when soil is inhaled, it may be lodged in airways, causing breathing problems
2. when soil is ingested, fungi and/or bacteria may accumulate causing health problems.
3. burns may cause redness in skin, and (depending on the sensitivity of the skin) may cause it to peel.
CONTROL THE RISK:
1. wear a mask when handling soil. if possible, wear goggles for extra safety and care.
2. wear a mask and thoroughly wash hands and even fingernails to prevent ingestion of soil
3. wear dish-washing gloves or any water proof gloves and protective facial gear. also, avoiding turning the tap on too fast or too high, as this results in hot water splashing.
DISPOSAL:
1. all materials that are no longer needed can be placed into a garbage bag and be disposed of. For the disposal of water, simply drain the sink.
Friday, June 11, 2010
re-writing the method.
AIM: To determine weather water temperature affects plant growth .
HYPOTHESIS: When water is too hot or too cold, the growth rate will decrease.
EQUIPMENT:
- 16 violas (flowers)
- fertilised soil
- 4 rectangle pots
- thermometre
- tap water
- ice cubes
- 20mL measuring cup.
- sink hole blocker.
METHOD:
Steps taken:
1. 6 holes were poked through the 4 pots to allow excessive water to escape the pot.
2. 4 pots were filled up with fertilised soil.
3. 16 violas were planted in the pots - 4 in each pot.
4. Pots were placed in an atmosphere with a temperature or 20 degrees Celsius.
5. First pot was named number 45; second pot was named number 35; third pot was named number 25 and the fourth pot was named number 15.
5. Using the thermometre to measure the temperature, tap water of 45 degrees celsius was obtained.
6. 20mL of 45 degrees celsius tap water was taken using the 20mL measuring cup, and one plant in pot number 45 was watered.
7. Step 6 was repeated with all four of the plants in pot number 45.
8. Using the thermometre to measure the temperature, tap water of 35 degrees celsius was obtained.
9. 20mL of 35 degrees celsius tap water was taken using the 20mL measuring cup, and one plant in pot number 35 was watered.
10. Step 9 was repeated with all four of the plants in pot number 35.
11. Using the thermometre to measure the temperature, tap water of 25 degrees celsius was obtained.
12. 20mL of 25 degrees celsius tap water was taken using the 20mL measuring cup, and one plant in pot number 25 was watered.
13. Step 12 was repeated with all four plants in pot number 25.
14. USing the thermometre to measure the temperature, tape water of 15 degrees celsius was obtained (N.B. since the tap water used had a minimum temperature of 17 degrees celsius, ice cubes were used to lower the temperature in order to obtain water of 15 degrees)
13. 20mL of 15 degrees water temperature was taken using the 20mL measuring cup, and one plaint in pot number 15 was watered.
14. Step number 13 was repeated with four plants in pot number 15.
15. Steps 5-14 were repeated everyday for one week.
16. Plants were observed and results were recorded.
HYPOTHESIS: When water is too hot or too cold, the growth rate will decrease.
EQUIPMENT:
- 16 violas (flowers)
- fertilised soil
- 4 rectangle pots
- thermometre
- tap water
- ice cubes
- 20mL measuring cup.
- sink hole blocker.
METHOD:
Steps taken:
1. 6 holes were poked through the 4 pots to allow excessive water to escape the pot.
2. 4 pots were filled up with fertilised soil.
3. 16 violas were planted in the pots - 4 in each pot.
4. Pots were placed in an atmosphere with a temperature or 20 degrees Celsius.
5. First pot was named number 45; second pot was named number 35; third pot was named number 25 and the fourth pot was named number 15.
5. Using the thermometre to measure the temperature, tap water of 45 degrees celsius was obtained.
6. 20mL of 45 degrees celsius tap water was taken using the 20mL measuring cup, and one plant in pot number 45 was watered.
7. Step 6 was repeated with all four of the plants in pot number 45.
8. Using the thermometre to measure the temperature, tap water of 35 degrees celsius was obtained.
9. 20mL of 35 degrees celsius tap water was taken using the 20mL measuring cup, and one plant in pot number 35 was watered.
10. Step 9 was repeated with all four of the plants in pot number 35.
11. Using the thermometre to measure the temperature, tap water of 25 degrees celsius was obtained.
12. 20mL of 25 degrees celsius tap water was taken using the 20mL measuring cup, and one plant in pot number 25 was watered.
13. Step 12 was repeated with all four plants in pot number 25.
14. USing the thermometre to measure the temperature, tape water of 15 degrees celsius was obtained (N.B. since the tap water used had a minimum temperature of 17 degrees celsius, ice cubes were used to lower the temperature in order to obtain water of 15 degrees)
13. 20mL of 15 degrees water temperature was taken using the 20mL measuring cup, and one plaint in pot number 15 was watered.
14. Step number 13 was repeated with four plants in pot number 15.
15. Steps 5-14 were repeated everyday for one week.
16. Plants were observed and results were recorded.
Change in a LOT of things.
I know it's very last minute, and I haven't been posting much...
so much for my blogging resolution.
Anyway, the changes I have made are the following:
- the number of groups of plants.
- number of plants per group
- water termperatures. (temperatures are as follows: 15, 25, 35, 45)
sorry for the last minute change. I wasn't able to receive my thermometre until Tuesday.
And because of this, I did not realise how very HOT 50 degrees is, and I was planning on using water temperatures up to 80 or so. My mistake.
I shall re-write my method in the next post, which may take some time.
okay, here it goes...
so much for my blogging resolution.
Anyway, the changes I have made are the following:
- the number of groups of plants.
- number of plants per group
- water termperatures. (temperatures are as follows: 15, 25, 35, 45)
sorry for the last minute change. I wasn't able to receive my thermometre until Tuesday.
And because of this, I did not realise how very HOT 50 degrees is, and I was planning on using water temperatures up to 80 or so. My mistake.
I shall re-write my method in the next post, which may take some time.
okay, here it goes...
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