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...
Sunday, May 23, 2010
change of plans...
URGENT NOTICE MISS ZHANG!
Actually I don't know how urgent it is but, my seedlings are not growing, and I have no idea why. That's why, today, instead of getting seeds to sprout, I bought from GardensR'Us some plants that are already growing. They are 15 purple violas, however they have not bloomed and are still very small.
So, if it is okay, I have decided to start off with those young plants :)
I don't know if that will affect anything though.
Will it affect anything, Miss Zhang?
Actually I don't know how urgent it is but, my seedlings are not growing, and I have no idea why. That's why, today, instead of getting seeds to sprout, I bought from GardensR'Us some plants that are already growing. They are 15 purple violas, however they have not bloomed and are still very small.
So, if it is okay, I have decided to start off with those young plants :)
I don't know if that will affect anything though.
Will it affect anything, Miss Zhang?
Tuesday, May 18, 2010
RAIN !!
Well, as you can see from today, the weather was POURING !
and today, as i was checking up on my plants and was getting ready to water them, i realised that the soil was SOAKING wet! not moist as I had left it a few days earlier...
Now I'm afraid that my seedlings will die or because the soil is drenched.
Can plants just drown like that? I'm really scared now.
:(
Let's just hope that the pouring rain just acted as the supply of water that they required for today.
and today, as i was checking up on my plants and was getting ready to water them, i realised that the soil was SOAKING wet! not moist as I had left it a few days earlier...
Now I'm afraid that my seedlings will die or because the soil is drenched.
Can plants just drown like that? I'm really scared now.
:(
Let's just hope that the pouring rain just acted as the supply of water that they required for today.
Wednesday, May 12, 2010
EXPERIMENT - Method.
Yes, I know I haven't been posting up blogs until today.
I shall make this months resolution to post a blog at least three times a week.
Sorry if I fail, but I'll do my best.
Oh, is the experiment meant to be third person past tense? Just a question.
Here's the experiment:
AIM: To determine whether water temperature affects plant growth.
HYPOTHESIS: When water is too hot or too cold, the plant will wilt or its growth rate will decrease.
EQUIPMENT:
- 15 pots
- flower seeds
- fertilised soil
- thermometre
- measuring cups
- tap water
- refridgerator
- kettle
METHOD:
Steps...
1. All 15 pots were filled with fertilised soil.
2. A single flower seed was buried in the fertilised soil in each of the 15 pots.
3. Each pot was watered with 5mL of tap water (all water temperatures remained the same)
4. Pots were placed outisde where shelter is available, therefore sunlight is able to reach it however, rainy weather will not affect it.
5. Step 3 was repeated every two days for two weeks.
6. After two weeks, the pots were organised into 5 groups - 3 pots each group.
7. A certain amount of tap water was attained and then put in the refridgerator so that the temperature lowers to 5 degrees celsius.
8. While waiting for the water temperature to lower in Step 7, another amount of tap water was attained and, with the use of the kettle, was boiled.
9. Thermometre was used to measure the temperature of the water amounts.
10. The first group was watered with very cold water, approximately 5 degrees celsius.
The second group received water approximately 10 degrees. (approx average temperature of tap water)
The third group received water approximately 35 degrees.
The fourth group received water approximately 50 degrees.
The fifth group received water approximately 80 degrees.
11. Steps 7-10 were repeated
12. Plant growth was examined and information was recorded.
I shall make this months resolution to post a blog at least three times a week.
Sorry if I fail, but I'll do my best.
Oh, is the experiment meant to be third person past tense? Just a question.
Here's the experiment:
AIM: To determine whether water temperature affects plant growth.
HYPOTHESIS: When water is too hot or too cold, the plant will wilt or its growth rate will decrease.
EQUIPMENT:
- 15 pots
- flower seeds
- fertilised soil
- thermometre
- measuring cups
- tap water
- refridgerator
- kettle
METHOD:
Steps...
1. All 15 pots were filled with fertilised soil.
2. A single flower seed was buried in the fertilised soil in each of the 15 pots.
3. Each pot was watered with 5mL of tap water (all water temperatures remained the same)
4. Pots were placed outisde where shelter is available, therefore sunlight is able to reach it however, rainy weather will not affect it.
5. Step 3 was repeated every two days for two weeks.
6. After two weeks, the pots were organised into 5 groups - 3 pots each group.
7. A certain amount of tap water was attained and then put in the refridgerator so that the temperature lowers to 5 degrees celsius.
8. While waiting for the water temperature to lower in Step 7, another amount of tap water was attained and, with the use of the kettle, was boiled.
9. Thermometre was used to measure the temperature of the water amounts.
10. The first group was watered with very cold water, approximately 5 degrees celsius.
The second group received water approximately 10 degrees. (approx average temperature of tap water)
The third group received water approximately 35 degrees.
The fourth group received water approximately 50 degrees.
The fifth group received water approximately 80 degrees.
11. Steps 7-10 were repeated
12. Plant growth was examined and information was recorded.
Climate Graph.
WEATHER FOR SYDNEY
(Rainfall / MAX and MIN Temperature)
If it makes things easier, I'll also include the information that Ms Zhang gave us so, Ms Zhang, if you're checking it, you don't have to continuously press Alt + Tab to check the climate graph. :)
(I've also taken out the unnecessary information i.e. Daily Maximum and Minimum Farenheit, etc)
Changing flowers.
Well, it turns out that the fastest growing flowers grow in TEN weeks
(according to the flower shop assistant) so instead of Lilies, we've received another type of flower, but other than that, nothing has changed in this experiment.
Also, to water the seedlings, I will make sure that each flower receives the exact amount of water each time. However, for the first week or two, the temperature of the water being watered to each plant will be the same (tap water temperature). This is because I want to know whether the plant GROWTH will be affected, not whether a plant will sprout slower/quicker/not at all.
When the plants are around two weeks old, I shall start changing the temperature and examine the growth of the plants.
(according to the flower shop assistant) so instead of Lilies, we've received another type of flower, but other than that, nothing has changed in this experiment.
Also, to water the seedlings, I will make sure that each flower receives the exact amount of water each time. However, for the first week or two, the temperature of the water being watered to each plant will be the same (tap water temperature). This is because I want to know whether the plant GROWTH will be affected, not whether a plant will sprout slower/quicker/not at all.
When the plants are around two weeks old, I shall start changing the temperature and examine the growth of the plants.
Wednesday, March 10, 2010
blog submission - March 11th
there are several ways i can conduct this experiment.
one way (most likely way i'll be doing it)
is to put to gather 5 pots filled with soil and plant three seeds in each pot.
then, each pot will be watered with varied temperatures - possibly 15 degrees celsius apart
(e.g. 1st pot: water temperature 5'C, 2nd pot 20'C, 3rd pot 35'C, 4th pot 50'C, 5th pot 65'C)
should the temperature range increase?
i will water them probably a couple of times a week, depending how much water they need.
fertiliser will also be handy, as there is a disease called Rot which deteriorates the flower in a matter of hours. :(
another way to conduct this experiment is to place each individual seed in their own pots, then carry out the acitivities from the first method above. however, this was not advised, so i will not do this.
in this experiment, the independent variable is the temperature of the water being watered to the plants. the dependant variable is the plant growth of the lilies.
this experiment is reliable and will be conduct fairly, as the plants will be grown in same conditions (same place, same soil, same sized pot). the only difference will be the temperature of the water. also, it will be able to be completed within the time frame, as lilies take approximately 3 weeks to grow. normal household equipment will be used. (pots for plants, tap to supply water, fridge/ freezer / kettle to change the temperature of the water, etc)
after observing the growth of each plant, a conclusive result will be able to be determined whether or not the temperature of water will determine plant growth.
one way (most likely way i'll be doing it)
is to put to gather 5 pots filled with soil and plant three seeds in each pot.
then, each pot will be watered with varied temperatures - possibly 15 degrees celsius apart
(e.g. 1st pot: water temperature 5'C, 2nd pot 20'C, 3rd pot 35'C, 4th pot 50'C, 5th pot 65'C)
should the temperature range increase?
i will water them probably a couple of times a week, depending how much water they need.
fertiliser will also be handy, as there is a disease called Rot which deteriorates the flower in a matter of hours. :(
another way to conduct this experiment is to place each individual seed in their own pots, then carry out the acitivities from the first method above. however, this was not advised, so i will not do this.
in this experiment, the independent variable is the temperature of the water being watered to the plants. the dependant variable is the plant growth of the lilies.
this experiment is reliable and will be conduct fairly, as the plants will be grown in same conditions (same place, same soil, same sized pot). the only difference will be the temperature of the water. also, it will be able to be completed within the time frame, as lilies take approximately 3 weeks to grow. normal household equipment will be used. (pots for plants, tap to supply water, fridge/ freezer / kettle to change the temperature of the water, etc)
after observing the growth of each plant, a conclusive result will be able to be determined whether or not the temperature of water will determine plant growth.
LILIES !
okay. i have decided to grow red or pink lilies to determine whether the temperature of the water affects plant growth.
they have large petals, so change or difference in growth will be evident.
also, the colours are bright, so it'll be easier to determine which flower is experiencing the best growth.
they have large petals, so change or difference in growth will be evident.
also, the colours are bright, so it'll be easier to determine which flower is experiencing the best growth.
looking for a type of plant?
which seeds should i use to do this experiment?
i'm thinking of experimenting with daisy flower seeds
in memory of Daisy ♥
but unfortunately i cannot do daisies as they grow within 2-2 and a half months.
there's simply no time for that :(
i'm thinking of experimenting with daisy flower seeds
in memory of Daisy ♥
but unfortunately i cannot do daisies as they grow within 2-2 and a half months.
there's simply no time for that :(
Sunday, February 21, 2010
start up
i have started a new blog for science.
my experiment will determine whether the temperature of the water effects plant growth.
:)
that's all.
my experiment will determine whether the temperature of the water effects plant growth.
:)
that's all.
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