Duckweed Experiment

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).

    One possible source of error that can affect the results was that a mercury thermometer was used instead of an electronic one. The use of a mercury

This lab will be driven by the research question, what is the effect of temperature (at 5oC, 15oC, 25oC, 35oC and 45oC) on the photosynthetic rate (measure of oxygen bubbles over a period of time) of Elodea (pondweed)?

This lab could have contained errors. The errors could have happened when performing the lab. Some of the possible errors in this lab are:

If I had lived during the Holocaust, the hardships would include lack of shelter, starvation, and survival. To start, people struggled to find a safe shelter. The book Milkweed is about a boy who has to change the locations of his shelter to be able to survive. I know that during this time period a lot of people who were jewish were taken to concentration camps were they were forced to work and were treated harshly. Because of this people had to change the location of their shelter to escape getting caught. Additionally, people also had to face the struggles of starvation. Since hitler and his nazis were killing off a lot of people, the people who owned food stores could no longer sell food. This meant that people couldn’t get the same amount

The purpose of this experiment was to investigate the effect that different liquids would have on gummy bears. To do this we brought in different liquids, such as Fanta soda, salt water, water, and baking soda water. My hypothesis is, If you put gummy bears in different liquids then they might dissolve or enlarge. This experiment was tested on 9-14-17 and my group and I started gathering data, we started with 1 minute, 5 minutes, and then 24 hours. There wasn’t much change in the 1 and 5 minutes, the real change happened overnight. The next day of this experiment the gummy bears had mostly enlarged and softened, there was one that accomplished to do the exact opposite, the salt water gummy bear decreased and hardened. I believe that the salt

These different mistakes during the lab caused the results to change during the

As with many experiments that are performed in a setting where we cannot be exact on every measurement, error could arise from it. For instance, from this particular experiment, we needed to measure 5mL of water and 5mL of the borax mixture after it had cooled. Measuring 5mL with the bulb pipet that we were provided was not an exact measurement tool. The pipets provided were not calibrated and/or could have contained pockets of air with the assumed 5mL of water or solution.

milkweed within its body and by eating the leaf in a circle it stops the thick liquid inside from coming out and overwhelming it.

In 1992, an amendment was made to the Clean Air Act in the US, aimed at reducing the

During this experiment many errors were made. The biggest error that was made was that we did not control the environment that the slime molds were in. We initially kept them at school in favourable conditions, where growth was good. We then took them home and moved them around the house, so the slime mold was constantly having to adapt to these environmental changes, until it could not withstand it anymore, and eventually died. Another error that was made was the fact that in transferring the slime molds, and feeding them we used only inoculating hoops, these inoculating

The original experiment was a failure, as the method of measuring duckweed by surface area was inefficient and inaccurate. The minimum amount of salt (2.5ml) added to the samples, turned out to be enough to kill all the duckweed, allowing no comparison to be made of the growth rate. In the second attempt I will count out a smaller, but exact, number of duckweed fronds which will make counting growth easier and more accurate. I will also use smaller amounts of salt (0.5-1.5 ml)

Thirty percent of Warsaw’s population were Jews prior to the Holocaust, which was a staggering 350,000. However, during the Holocaust 400,000 Jews were forced to live in grotesque conditions by the Nazi regime. In the novel Milkweed by Jerry Spinelli, Misha, a young orphaned boy, befriended a group of boys living in a barn. As turmoil spread in Europe about the Nazi reign, Jewish people were captivated and imprisoned in ghettos to be isolated from the rest of the population. Ensnared to stay with his “pseudo” family, Misha, lives with the Milgroms in a ghetto. As the story progresses, different themes such as famine, disease, and death, manifest throughout the novel resembling the annexation of the Nazi party and the captivity of millions

Have you ever wondered what would happen if plants grew in acidic water? What about bottled mineral water? Water with fertilizer? Well, now you can know! In my experiment, I will be testing which type of water will help the plant grow better. In this case, I will be using duckweed to test the water. Duckweed is a very small, green plant that floats on the water’s surface. My hypothesis is that the duckweed will grow best in fresh water because duckweed is usually found growing abundantly in freshwater ponds or lakes.

and reading the temperature on time could’ve been a difficulty. Another error could be not making the experiment a fair test by stirring or knocking over the beaker. Recording the temperature incorrectly could be an error due to this experiment because as the temperature increases, the red line can sometimes be in between a number and a number so the number has to be rounded off which isn’t very accurate. Using a stopwatch to time each minute that passed could’ve been a difficulty because when reading the temperatures, it can take a while to round off the nearest temperature and therefore, time has already passed a minute. In other words, when the time shows a minute, reading can already take up to a minute and ten seconds. Stirring the beaker of the melted ice could’ve been an error because to do this, it makes the experiment unfair because you have changed the temperature and making the ice melt faster. Knocking over the beaker could’ve also been an error because accidents happen when bodies are not careful of their surroundings.