Researching for different ideas
2/3/11-Created my Blogger and g-mail accounts
5/3/11-Planted Sunflower seeds and watered them
6/3/11-Bought 3 plants for backup (cancelled)
Watered seeds and placed them in the same environment first to allow them to grow into seedlings
Wrote down the aim, hypothesis,equipment, safety measures, the 3 variables
Aim: To test which environment is best for sunflowers to grow
Hypothesis: That the most amount of sunlight is best for sunflowers to grow
Equipment: Sunflower seeds
Soil or potting mix
Water
Pots or cups
Ruler
Safety Measures: To handle with care with the sunflower seedlings and do not overwater or they will drown in the water and wouldn't grow
REMINDER: REMEMBER TO WATER YOUR SUNFLOWERS EACH DAY
Dependant variable: (Measure) The height of the sunflowers from the 3 different environments
Independent variable: (Change)The environment (Different amount of sunlight)
Controlled variable: (Same) The number of seeds in each
The amount of water for each sunflower
11/3/11- Method:
1. Fill up 3/4 of each of the 3 pots with the soil or potting mix
2. Make a hole in the soil about 2cm in depth and place 2 seeds in the hole and cover it up
3. Water your plants just enough to be moist
4. Allow the seeds to grow for a week and a half in the same sunlight condition
5. Water each sunflowers each day and measure the height of the sunflowers
6. Draw up 3 information table for your results, copy the table below for all three environments
EG. Height (cm)
Day Date Sunlight Average No sunlight Health Colour
1 8/3/11 5 5 5 VH Emerald
2 9/3/11 6 5.3 5.2 VH Emerald
3 10/3/11 7 6 5.5 VH Emerald
Key for health: P= Poor Health
H=Healthy
VH=Very Healthy
7. As the sunflowers turns into a seedling, start to record the height in centimetres (cm) and write down observations using a ruler.
Observe and record results for about 1 or 2 weeks
MY RESULTS
Change the results table to the one at the top
Environment Day/date Health Description Height (cm) Colour
Sunlight 1-8/3/11 VH Shed its shell 6 Emerald
Average Sunlight 1-8/3/11 VH Shed its shell 6 Emerald
No Sunlight 1-8/3/11 VH Shed its shell 6 Emerald
Sunlight 2-9/3/11 VH Moist leaf comes out 6.3 Emerald
Average Sunlight 2-9/3/11 VH Moist leaf comes out 6.2 Emerald
No Sunlight 2-9/3/11 VH Moist leaf comes out 6.1 Emerald
Sunlight 3-10/3/11 VH 1 leaf flowers 6.5 Emerald
Average Sunlight 3-10/3/11 VH 1 leaf flowers 6.4 Emerald
No Sunlight 3-10/3/11 VH 1 leaf flowers 6.3 Emerald
Sunlight 4-11/3/11 VH Leaf faces the sun 6.7 Dark green
Average Sunlight 4-11/3/11 VH Leaf faces the sun 6.7 Dark green
No Sunlight 4-11/3/11 VH Leaf faces tries to get sunlight 6.5 Dark green
Sunlight 5-12/3/11 VH Leaf faces the sun 7.3 Dark green
Average Sunlight 6-13/3/11 VH Turns light green 7.5 Green
No Sunlight 6-13/3/11 VH Slow grow increases 7.4 Green
Sunlight 7-14/3/11 VH Turns back to dark green 8 Dark green
Average Sunlight 7-14/3/11 VH Turns light green 7.8 Light green
No sunlight 8-14/3/11 H Turns light green 7.6 Light green
Sunlight 8-15/3/11 VH Leaves strout out 8.3 Emerald
Average Sunlight 8-15/3/11 H Leaf faces the sun 7.7 Dark green
No Sunlight 8-15/3/11 H Leaf faces tries to get sunlight 7.6 Dark green
20/3/11-Redone the results table and that I have also done it on NeoOffice
28/3/11-Repeating my experiment today, so I have replanted 3 more sunflower seeds and placed them in the same conditions until they are seedlings, then put them in their sunlight environments.
Did some research for the background information on plants and why they need the sun source to be able to be healthy and to survive.
WHY DOES PLANTS NEED THE SUN'S SOURCE?
Plants need the sunlight sources to be able to produce their own foods from the process of photosynthesis. The help of the sun also gives the pigment to the plant which enables the plants appearance colour. Plants need the sun in order to grow, provide its own way in synthesising (combining) glucose from water and carbon dioxide with the release of oxygen. Glucose is an important component in the beginning of every plant's life. It allows photosynthesis to use inorganic substances to build its own organic substances that are used for life of the plants. But animals can be partly helpful because they can be a organic material, such as an animal flesh and that this animal flesh to plant tissues can end up being used by the process of photosynthesis for the benefits of the plants life.
Repeated results
Height (cm)
Day Date Sunlight Average No sunlight Health Colour
1 9/4 5 5 5 VH Emerald
2 10/4 8 7 7 VH Emerald
3 11/4 10 10 10 VH Emerald
4 12/4 7.5 11.5 10 VH Emerald
5 13/4 7.8 12.5 10.3 VH Green
6 14/4 8 13 10.4 VH Green
7 15/4 8.5 13.5 10.5 VH Green
8 16/4 9 14 10.5 H Green
9 17/4 10 15 10.5 H Green
10 18/4 10.5 15.5 10.6 PH Yellow
11 19/4 10.5 16 11 PH Yellow
12 20/4 11 16 11 PH Yellow
13 21/4 11 16 11 PH Yellow
14 22/4 12 17 12 PH Yellow
22/4/11-My experiment results didn't turn out for the plant experiment so I am changing to 'Which freezes faster, hot or cold water?'
HOT VS COLD Experiment
Aim:
To test whether the “Mpemba effect”, hot water freezing before cold water, can in fact freeze before the cold water. To test if the temperature of the water will affect the speed of the freezing process.
Independent variable (What you change): Temperature of water (hot/cold)
Dependent variable (What you measure): Water and time it takes to freeze
Controlled variable (What you keep the same): The amount of water
Hypothesis:
The prediction of the cold water will freeze before the hot water.
Materials/equipment:
- 1x Ice tray >Ice water >Marker
- Stop watch or a clock >Warm water
- Freezer >Hot water
Safety precautions
When pouring in the hot water, be careful not to burn yourself with the water or the kettle and be caution of wet, slippery floors and other areas. Be careful with the peers around you with the water making sure you don't bump into others with hot water.
Method:
- Gather all your materials that are needed
- 1x Ice tray >Ice water >Marker
- Stop watch >Warm water
- Freezer >Hot water
- Using a marker, label the ice tray with “C” for cold, “W” for warm and “H” for hot.
- Pour in the ice water carefully in the column which is labelled “C” for the cold.
- Pour in the warm water carefully in the column which is labelled “W” for warm.
- Pour in the hot water in the column which is labelled “H” for hot.
- Carefully open up the freezer door and making sure not to tip the water into other sections of the try, place the try in the freezer on a flat surface.
- Check the ice tray every 30 minutes to see if it has been frozen, if not close the freezer door gently to avoid any spills. (It should take about 2 hours to see results)
- When the ice has frozen, record which temperatured water freezes first (cold water, warm water or hot water) by putting 1, 2 and 3, where 1 is the first to be frozen and 3 where it is last to be frozen.
- Repeat your experiment 6 more times to get an accurate result
- After recording your results, draw up a graph and graph your results.
- Remember to give your graph a name and that you label your x and y axis.
24/4/11-My Results from the experiment
Place it froze in
Hot water 2nd
Warm water 3rd
Cold water 1st
Place it froze in
Hot water 2nd
Warm water 3rdCold water 1st
Place it froze in
Hot water 1st
Warm water 3rd
Cold water 2nd
Cold water 2nd
Place it froze in
Hot water 1st
Warm water 3rd
Cold water 2nd
Cold water 2nd
25/4/11-Before i did my experiment, I have done these questions to help me further later when it comes to doing the conclusion and discussion.
Background information
Background information
My questions set:
1. why does hot water freeze faster than cold water?
2. Does hot water have any additives like chemicals or bacteria which makes it faster to freeze?
3. What is the process of hot water freezing before cold water called?
4. When did this experiment first discovered?
5. Who discovered the experiment process?
6. What could affect the process from happening?
7. What are something that could go bad/wrong?
Answers
1. By process of evaporation, dissolved gas, convection and surroundings.
2. No just the processes that are listed above.
3. This process where hot water freezing before cold water is called "Mpemba effect".
4. It was discovered in 1969
5. A Tarzanian high school student called Erasto Mpemba
6. Somethings that could affect the process from happening could be there is a large difference between the temperature each time when repeating the experiment/s
7. Somethings that can go bad could be: a) not putting into a cold enough freezer
b) not placing in the same conditions
c) not putting them in at the same time
These are the websites that I have used to do the researching
http://en.wikipedia.org/wiki/Mpemba_effect
