and Weed control experts. Hypothesis If home-made and commercial herbicides are sprayed on weeds then the commercial herbicides will be more effective, because the chemicals are made by experts who know what chemicals kill and prevent weeds. Experiment Fill 2 different boxes and fill then with soil make sure to use the same type and amount of soil. Measure around one cup of grass seed and sprinkle it on the soil. Water the seeds daily until the grass is at least 1.5 inches tall.
Using salt on roadways and driveways has become the norm, but as some people have discovered, using salt to clear driveways seems to be affecting the grass that grows next to it come spring time. Hypothesis If I put rock salt on a patch of new grass, then the grass will not grow normally. Controlled Experimental Method The constant variables in this experiment are; * The amount of water given to the grass (5cc) * The amount of soil in each cell (1ft by 1ft by 6in) * The type of soil * The amount of light given (13 hours) * The temperature the grass were grown at (70 F) * The depth of the grass seed (1cm) Step 1. Planting grass seeds A. Fill all of the cells in both trays ½ full with soil.
In Partial Fulfillment of the Requirements of Science 9 Submitted by: Macam, Victoria Liz C. Escabarte, Chrystine Hace A. Navarro, Carl Louie T. Abstract: The researchers came up with the problem, “Can vitamins affect the growth of plants?” Many investigations were made regarding this problem yet the researchers wanted to clarify everything and tested the effectiveness of the vitamins with their own eyes. The researchers arrived with this problem because they wanted to know if there is a difference between organic and inorganic fertilizer and human vitamins. Lastly, the researchers wanted to help the farmers in providing a safer and more effective way of having healthy plants. Vitamins are important for the growth of plants. Based on other investigations, vitamins which are made up of organic compounds can help plants grow by providing them with essential nutrients.
Enough water should be added so that the flask is full to the 250 ml mark Tightly wrap the top of the flask with a Parafilm when finished 2. Set up the titration apparatus 3. Fill a dry 50 ml buret with EDTA solution using a small
4. Record the pH measurements in your table. 5. Rinse the beaker thoroughly, and pour into it another 25ml of tap water, and add 0.1M NaOH drop by drop, recording the pH changes in exactly the same way as for the 0.1M HCl. 6.
The question asked for this experiment was at what concentration these harmful chemicals in hairspray would have an effect on plant growth, specifically Wisconsin fast plant radish seeds. It was previously found that concentration of a contaminant in a plant is determined by its equilibrium with its concentration in the soil interstitial water (Chiou, 2001). So, for this experiment, hairspray was mixed with water at a 5%, 10% and 15% concentration before the solutions were added to the plant containers. The growth of each seed was compared to the growth of the control plant that was indulged in only water. The hypothesis for this experiment was that the higher the concentration of hairspray added to the plant, the bigger the effect, and therefore the least amount of growth.
The other lab partner should add the 20 mL water to the 100 mL beaker and stir for one minute. 19. Measure another 20 mL water using the graduated cylinder. 20. Add another 20 mL water to the 100 mL beaker and stir for one minute.
For every 20 drops of solution you will add 0.1g of zinc to the new test tube. Repeat steps 3 and four until the solution is clear. If there ever exists too little of the solution to get enough drops, add up to 1mL of distilled water to the solution. 4. Once the solution is clear, retrieve at least ten drops of the solution and place them in a new test tube.
Twenty drops of bromothymol blue was also added to the 150mL beaker. The pH was then obtained using the Vernier pH probe and it read 6.68. The 5mL pipet was then used to transfer 5mL of the green solution to the three 50 mL beakers. A 100mL beaker was obtained and filled with 1.0 M HCl solution and the pipet was used to acquire 1mL of the 1.0 M HCl solution. The 1mL of HCl was then transferred to one of the 50mL beakers turning the color of the solution to yellow.
Read the absorbance at 20 second intervals from the start of the mixing. Then record your measurements on the table. After two minutes remove the tube from the spectrometer and visually note the color change. 6) Now mix the contents of tubes 4 and 5, transfer to a cuvette, and repeat your measurements for two minutes at 20 second