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Effects of pollution on marine ecosystems
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The hypothesis for this experiment is that if daphnia are exposed to ethanol, aspirin,
Introduction: Isopods are crustacean, which is split into smaller groups, called order. Scientifically Isopoda order is called isopods, which include pill bugs and sow bugs (Crustacean class). Most of the time isopods are mistaken for “bugs” since they look like insects.
Lab Report- Penny Drop Lab Abstract: This lab is called the Penny Drop Lab. In this lab, your goal is to find out how many drops of water you can fit on the top surface of a penny. You are trying to find the surface tension between two liquids. In this case, we used soapy water and plain water. Adding soap ends up reducing the surface tension of the water.
In this lab we were trying to figure out if Salt Creek and Barker Lake had the correct chemical balances to sustain catfish for the years coming. In order to find this out, we tested the water using a Hach Water Testing Kit. Inside were dissolved oxygen reagent powder pillows 1, 2 and 3 which we added and mixed into our sample water to prepare it for testing. Then we added droplets of Sodium Thiosulphate Solution into the prepared water too see how much dissolved oxygen parts per million were in the water. Our independent variable in this experiment was the 5 different testing sites that we went to for water samples.
In this week’s lab we had to determine the density of a quarter, penny, and dime. My question was “How does is each coin?” Density is the amount of mass in an object. To find the density of each coin in this lab, we used a triple beam balance to find each coin’s mass and a graduated cylinder to find their volumes. With all this information, I can now form a hypothesis.
Corotto, F., Ceballos, D., Lee, A., & Vinson, L. (2010). Making the Most of the Daphnia Heart Rate Lab: Optimizing the Use of Ethanol, Nicotine & Caffeine. The American Biology Teacher , 176-179. The purpose of this article was to test the effects of chemicals on Daphnia magna.
Upon completion of the experiments, Daphnia specimen exhibited extremely low heart rate while in its natural environment, which highlighted the negative effects of plant defense mechanisms on other
Introduction: All living organisms require oxygen to grow. Daphnia magna and Lemna minor (also known as Duckweed in its most common form) are no exceptions to this rule. Fertilizer is used to help plants, like Lemna minor grow. Plants give off the oxygen that other organisms, such as Daphnia magna, need. However, over-oxygenated environments can cause excess in the plant life.
Nonetheless, besides fish, many other kinds of poikilothermic animals, such as snakes and frogs, use lungs instead of gills to breathe, and further researches may be conducted to explore if caffeine has an effect on their metabolism. For example, forty northern leopard frogs with similar body size will be captured and divided into twenty trials, and each two frogs will be tested in the same control and experimental conditions as the goldfish metabolism experiment did. The collected slopes of oxygen concentration will then be converted into oxygen consumption rate and analyzed by the paired t-test. If the difference in the oxygen consumption rate between the control and experimental groups is statistically significant, this experiment will show that caffeine affects the metabolism of frogs, one kind of poikilotherms that use lungs to
daedalus was the greatest architect and sculptor of his time. Daedalus was sorely jealous of talus. One day they were standing on a height and daedalus was so jealous he pushed talus off to his death. Daedalus signed king minos labyrinth. The king was so scared daedalus was gonna reveal his secret he couldnt let daedalus leave.
A circular black pool (136 cm diameter, 60 cm height and 30 cm depth) was filled with water (24–26°C). A circular platform (10 cm diameter, 28 cm height) was placed within the pool and was submerged ∼2 cm below the surface of the water in the center of the southwest quadrant. Outside the maze, fixed visual cues (i.e. a computer, hardware, and posters) were present at various locations around the room. Before the experiment, each rat habituated to the water maze for 30 seconds without a platform. The animals performed four trials daily, for 5 days.
Daphnia Introduction: Daphnia is a large genus comprising over 200 species of small freshwater crustaceans that belongs to the family Daphniidae and the order “Cladocera”. The common name of Daphnia is water flea and this name is due to jerky-flea like swimming movement. Daphnia often live is freshwater bodies of relative different quality including swamps, lakes, streams and rivers. Description: Daphnia in general are small and may range from as small as 0.5 mm to as long as 5.0 mm in length, sometimes more; and hence some daphnia species can be seen by naked eyes (e.g. Daphnia magna) , while others must are microscopic (e.g. Daphnia pulex).
The purpose of this lab was to change pennies from copper to silver to gold, like alchemists have attempted to do in history. Through the data and observations gathered throughout this experiment, it can be concluded that the pennies were not changed into a different element. For example, the density of the penny from 2005; which was the penny that was experimented on to see whether or not it could turn into silver; was 4.62 g/cm3 before the experiment and 4.89 g/cm3 by the end of the experiment. If this copper penny really would have turned into silver, then the density of the penny would be 10.49 g/cm3; which is the density of silver; by the end of the experiment. The penny may have turned silver in color, but this was only because it was plated in the zinc that was added to the beaker of water in the experiment.
The sculpture Doryphoros or “Spear Bearer” was created by sculptor Polykleitos in the Early Classical Period around 450-440 B.C.E out of bronze but was later recreated out of marble material. The ancient Greeks thought the human body was perfect, not the body itself, but how the mathematical proportions of every part of the body were in perfect relationship to the others. Polykleitos set out to capture what would perfect ideal beauty be? The idea that you could create a perfect body based on math was part of a bigger set of beliefs for the Greeks.
Title: THE BALLOON INFLATION REACTION Introduction: Chemistry is one thing that makes us understand and gives us reasons of why certain reactions gives certain results. In this experiment we will be illustrating the reaction between baking powder and vinegar and see what happens to the balloon that is attached to it. Hypothetically the reaction of the vinegar and baking powder will produce carbon dioxide which will inflate the balloon. If the more vinegar may happen that when more vinegar is added to the baking powder it may produce more carbon dioxide thus the balloons diameter increases.
