Task: Design and carry out a scientific experiment that investigates a topic from either the life,
earth or physical sciences and uses appropriate methods, tools, technologies, and quantitative
Problem statement= Given sand, rich soil regular soil, and water, which of them will be more effective
for a pineapple to regenerated from its crown?
Relevance of testable question= Humans wonder about living organisms and plants happen to be
essential when it comes to survival, so knowing what is more conducive to growth is important.
Literature review = I took a look at past experiments done by others, and in many ways they were alike
and in few ways they were different, in one experiment completed by Levins Hogg, Levins concluded
that a pineapple is not a seasonal fruit and can be grown anytime, during the winter the pineapple is to
be kept on the window seal during the day, in the night hours remove from the window seal to prevent
the frost from destroying it and in the summer months the pineapple can be kept outside in a shaded
area. In the second experiment done by Barthomew D, he agrees that a pineapple can be grown
anytime however he says that domesticated pineapples can be grown from its crown or slips and takes
about two years to grow.
The experimental design utilized in this project were, the same amount of light the plants were exposed
to, the size of the pot and the amount of sand, water and soil were also equal. The amount of pineapple
crowns and the temperature the crowns were exposed to were of equal value as well. Lastly the
pineapples were exposed to the same environment and planted 7cm deep. The variable of response is
decided when the root lengths were measured every three days. The materials used in this experiment
was six five inch plant pots, a log book, one measuring cup, six pineapple crowns, measuring tape,
fertilizer containing 14% solube potash, 8% phosphate, and 18% nitrogen, gallon of water, 6pd bag of
sand, sun lamp, 14pd bag of potting soil containing small amounts of phosphate, nitrogen and solube
potash. The steps needed to carry out the experiment are as follows, Step 1, gather all necessary
materials for project, Step 2 label pots, “soil”, “soil with fertilizer”, “sand”, “sand with fertilizer”,
“water”, “water with fertilizer”. Step 3, place 400 ml of soil, 3 tblspns of fertilizer in pot (respective to
label). Step 4, place 400ml of soil (no fertilizer) in pot. Step 5, place 400 ml of sand and 3 tblspns of
fertilizer in pot. Step 6, place 400 ml sand ( no fertilizer) in pot. Step 7, place 400 ml water in pot,
Step 8, place 400 ml of water and 3 tblspns of fertilizer in pot. Step 8 place one pineapple crown in
each pot 7cm deep into soil. (The water pots, place one pineapple crown in each let sink to bottom).
Step 9, make sure room temperature is 80 degrees farenheit. Step 10, turn lamp on, then turn off when
day turns to night. (to give effect of sunlight, night and day). Step 11, 3rd day of experiment, water the
sand and soil pots (just enough to moisten the soil/sand). Step 12, take measurements with
measuring tape of all six pots, log results into log book. Repeat step 10, daily, and repeat steps 11-12
every three days for the next four weeks of the experiment totaling 5 weeks.
A dependent variable is something that depends on other factors and has the ability to change; in this
experiment the dependent factor is the pineapple plant which is what I observe meaning the growth
measured in millimeters. A independent variable is what I can physically change such as in this
experiment the amount of water, soil , fertilizer and sand are all examples. The controlled variable is
the same amount of soil, fertilizer, sand and water used in each pot. It also would include the depth that
I planted the crowns; in this case it is 7 cm deep...
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