Environmental Science Lab Report

In this experiment we are testing the effect of fertilizer on the speed of plant growth. We prepared a 4 quad cell, 1 control group and 3 experimental groups. So, we had one with no fertilizer, one with three seeds of fertilizer, one with six seeds of fertilizer, and lastly, one with nine seeds of fertilizer. The plants that we grew were called Wisconsin Fast Plants, members of the crucifer family. These plants are small and easy to grow, but for optimal growth they require continuous fertilizer, water, fluorescent light, and temperature between 18 degrees Celsius and 26 degrees Celsius 24 hours a day. Fertilizers are substances that are put into soils to increase the growth of the plant. There are two different types of fertilizers, synthetic

The hypothesis behind this experiment is that the Gibberellic acid has a positive growth effect on the plant and causes it grow larger in height.

The average population count for duckweed in the treatment groups was lower than that in the control groups for each day data was recorded (Table 1). By day fourteen, the average population size of the control group reached 307 individuals, nearly twice that of the treatment group (Table 1).

The results observed do not correspond with the outcome predicted by the hypothesis. Despite the nature of the subjects of the experiments, no substantial growth was observed. Only one seed of the 36 planted germinated, and it could only survive for a period of a week. The one seed that germinated reach a height of 1.2 cm. Table 1 presents the average growth observed in each quad. Each quad had a total of 12 seeds. No seeds were removed during the course of the experiment.

• Design a scientific experiment to determine the effect of the variable on the rate of photosynthesis for the organism

On October 6th 2015, the students of Mattawan’s AP Environmental class took a trip to the local stream of the Mattawan Consolidated Schools area. The purpose of this trip was to conduct a stream study to determine the health, conditions, and pollution levels of this small body of water. A multitude of factors came into play when making a judgement on the stream’s health, and making sure to take all of these essential points was crucial to the study. A variety of thorough experiments were conducted to help make this overlying conclusion, as many students adopted many roles in the study. Students used a physical survey form, water test data sheet, and taxa recording sheet to record their findings. Teamwork was essential in making sure all of this information could be found accurately and efficiently. The combination of all of the final results allowed the class to make a judgement of the stream’s state.

The objective of Day 2 of this lab was to remake the fertilizer from Day 1 with the given mass percentages of phosphorus, nitrogen, and potassium, this time adding 20% sulfur by mass. For this experiment it was necessary to adjust the pH of the final solution so that it was within pH 6 and 7 with sodium hydroxide and/or nitric acid.

This science fair project will test which antacids are most potent in neutralizing lemon juice. When an acid and a base combine the base will neutralizing the acid in a chemical reaction; this is how antacids work as well. Antacids are substances that will neutralize stomach acidity which in return relieves heartburn, indigestion, or stomach pain.

Hypothesis: The duckweed will show a small growth increase with very low levels of salinity and then will show a decline in growth rate as the levels of salinity increase.

The specific challenges of such a life to animals are food resources and healthy body. To survive, an animal has to ingest and digest foods in order to provide energy for daily activities. Moreover, on the quality aspect of animals’ life, animals have to live healthy without illness.

What water level did you select for plant growth during your first attempt? Describe the observations of your plants at this water level. Based on your data, was the level you picked the best choice for optimum

The third source of uncertainty would be the ruler used to measure the seeds. The uncertainty of the ruler used was ±.05 cm. The next step for this experiment would be to allow more time for the growth of the seeds. Therefore, instead of focusing on the germination of the seeds, one could also study the flowering of the plant and observe whether the value of pH continues to affect the growth. To ensure less uncertainty, the 2 batches of seeds could start on the same day to allow the same allow the same amount of sunlight.

Aquatic plants are an important component of lake systems. These plants may be totally submerged beneath the lake surface, floating, or growing along the shoreline. They provide food and shelter for bugs, fish and other organisms, prevent shoreline erosion, filter pollutants from adjacent shoreline activities, and provide oxygen to the surrounding environment.

Digging through the recycling bin of the math supervisor's office, I pull out an old piece of paper with typed font on one side, and blankness on the other -- perfect. “Mom,” I say, looking up with my four-year old eyes, “Do you have a pencil?” She goes into her purse to retrieve one, eager to see what simple drawing I could create as we waited for my dad (who was a math teacher at the time) to come out of his meeting. However, as she is searching, I waddle right up to the bookshelf and pursue my options. A vast array of different grade-level textbooks were laid out before me; the third-grade option seemed most suitable. I took my pencil, the book, and the paper, and sat sat down at the table to see what I could make of the advanced problems.

The overall purpose of the lab is to have the students practice designing an experiment, gathering data, and then analyzing that data to form a conclusion using the scientific method. It also served to understand key terms such as hypothesis, dependent variable, and independent variable. The specific objective of this lab is to determine whether certain human body parts experience allometric or isometric growth. Allometric growth defines when certain parts of an organism grow at unequal rates in comparison to its whole, while isometric growth is when all parts of an organism grow at the same rate in comparison to the entire organism. The specific purpose of the lab is to determine whether or not specific human body parts experience allometric or isometric growth by comparing the ratios of height to two specific body parts, in the students’ case the right hand length and head circumference, in students and newborns. The students formulated the tentative answer that if a team of four compared their height to right hand length ratio, as well as, their height to head circumference ratio, to those of a newborn’s, then the students will discover that the right hand and head experience allometric growth in humans.