We will then put one pipette full into a Petri dish (be sure NOT to mix up the pipettes with a different solution). Make sure you have two brine shrimp in each of the dishes. We will now record their behavior for 5 minutes, 10 minutes, and 20 minutes for all of the solutions. INDEPENDENT VARIABLE: In order to see if there is any change with the brine shrimps movement, we used a control solution to compare all the other solutions. DEPENDENT VARIABLE: Using the control solution showed that sometimes brine shrimp swim faster than other ones.
In the future, the experiment should be repeated with a larger sample size. Introduction: In a natural environment, fish have a lot of space to move around in, but sometimes humans force fish to live in artificial tanks. Fish farms and pet fish are placed in, small and sometimes crowded tanks, putting the fish in a more stressful environment than their natural one. This arrives to the question of how much space a fish needs to feel comfortable, and how it affects the fish behavior and physiology. The goal of this experiment is to see if putting two fish in a flask stresses out the fish by comparing the metabolic rate of a single fish in a flask to the metabolic rate of a fish when it shares the flask with another fish.
Younger lionfish have a unique tentacle above their eye sockets, which differs in appearance between species, but studies show that this tentacle has evolved over time in each species serving to attract new prey. Juvenile lionfish eat mostly invertebrates, but shift their diet to fish as adults and eat reef fish. Adult lionfish spread their pectoral fins and use them to "herd" prey. This is a very effective predatory style because it is unfamiliar to native Florida fish. However, Lionfish can have negative effects on the overall reef habitat as they can eliminate organisms which serve important ecological roles such as herbivorous fish which keep algae in-check on the reefs.
Features: Sea Tartlets has the savoury taste of the sea having the different kinds of seafood combined. Also, the creamy flavour of milk and cheese will appeal to the taste of all ages. V. Benefits: Seafood is a nutrient rich food that is a good source of protein, vitamins and minerals. Scientific studies continue to explore the relationship between the unique type of fat found in seafood, the omega-3 fatty acids DHA and EPA, in the prevention or mitigation of common chronic diseases. If you include one portion of seafood in your weekly diet, you may halve the chances of suffering a heart attack.
Topic 5: On the wild side 17. Describe how to investigate the effects of temperature on the development of organisms (eg seedling growth rate, brine shrimp hatch rates). Procedure You will need: • Brine shrimp egg cysts • 2g sea salt for each treatment • 100cm³ de-chlorinated water for each treatment • 40cm³ beakers (one for each temperature to be tested) • Water baths or incubators (one for each temperature to be investigated) • Stirring rod • Magnifying glass • Pair of forceps • Fine glass pipette • Bright light Experiment: 1. Decide on a range of temperatures from 5°C to 35°C to be tested. 2.
They respond quickly to a change in environment because they are such tiny organisms. They are often used to check the acidity of a chemical compound that may be found in water. One of the main types of zooplankton in freshwater temperate systems is Daphnia (Ziarek et al., 2011). Daphnia, also known as water fleas, are small crustaceans that live in fresh water. They serve as an important source of food for fish and other aquatic organisms.
Liz Somone Chem 112 TA: Meng Floating Egg Lab Report The goal of this experiment was to determine the density of a solution needed to float an egg, the freshness of an egg, and the way volumetric glassware affects the value and accuracy of density. The types of volumetric glassware used were a 25-mL buret, 25-mL Mohr pipet, 25-mL volumetric pipet, 25-mL volumetric flask and a 25-mL Erlenmeyer flask. I prepared a 1500 mL solution of salt and water in order for the egg to float. Using that same solution I filled a buret that was mounted vertically to the 0 and then drained the solution to nearest 0.00 mL. The solution was then drained into an Erlenmeyer flask and I recorded the weight of the flask before (W1) and after the solution (W2) and then subtract the weight of the flask with the solution from the weight of the flask alone in order to find the absolute mass of the solution (W3).
Construct a hypothesis – Based on your observation in question 1 and your background research in question 2, develop a hypothesis relating to the amount of dissolved oxygen measured in the water sample and the number of fish observed in the body of water? Answer = I would test the dissolved oxygen in different areas of water, keep track of the fish in those areas and compare the results. 4. Test with an experiment – Describe an experiment that would allow you to test your hypothesis from question 3. This description must provide ample detail to show knowledge of experimental design and should list the independent and dependent variables, as well as your control.
“Different Solutions Affect Cells” The purpose of this laboratory was to observe how a cell, in this case a chicken egg, reacted in different solutions. The solutions used in this experiment were: vinegar, syrup, and water. Depending on the solution, a cell will change in size. After being left in vinegar, the eggs calcium shell dissolved. This allowed the semi-permeable membrane to be exposed.
In this experiment, you will be looking at the movement of water. Your teacher has soaked the eggs in vinegar. This dissolves the hard shell and leaves a soft outer covering that acts like the cell membrane of a cell. Materials: Egg Plastic cup Water Vinegar Corn syrup Procedure: Day 1 1. Mark the cup with a sharpie with your period number, group initials, and the first soaking solution (water, vinegar, or corn syrup).