OSPREYS Essays - Birds Of Prey, Accipitriformes, Osprey, Biota

OSPREYS My report is about the osprey. The osprey is a carnivore , it eats mostly fish. Ospreys have another name, fish hawk. It has that name because ninety per cent of their diet is fish. They have long, curved talons and scaly feet to help grip the fish. They have been seen swimming low over water after eating, perhaps to clean their talons after eating. Ospreys live in four continents, North America, Europe, Asia, and Australia. Ospreys begin nesting in early springtime. Their nests can weigh up to half a ton! When the babies are growing, the dad has to work very hard. He has to spend one fourth of the day getting food for babies. To be able to do that he has to eat twice as much as usual. When the male bird brings a fish, the female pecks at it and rips it apart so the babies can eat it. When the babies are a month old they are already 70 to 80% of their adult weight. The osprey doesn't have very many enemies because not very many birds or animals can beat the osprey in a fight. Eggs are sometimes eaten by hawks, eagles, or owls, but flying predators are not a big threat to the osprey. In North America, the greatest enemy of the osprey is the raccoon. The raccoon is very smart so it can get to the eggs and steal them. To help save the eggs people are now putting steal platforms on the tree or pole to trick the raccoons. If the osprey builds its nest on a tree that is sticking out of the water, it won't be as easy for the raccoon to get to the nest. The osprey is a unique bird. It is related to the hawk and eagle, but scientists put it in it's own special group. The underside of an osprey is white, while the feathers on the back are very dark brown. There heads are white, with black marks across the cheeks and on the crown.

163482-635 Essays - Chemical Elements, Reducing Agents, Free Essays

163482-635 Essays - Chemical Elements, Reducing Agents, Free Essays 163482-635 Nam e Ali Alkhaja Grade 8(s ) MYP Science Title: Periodic table Key concept: Change Related concepts: Form, change function Global contexts: Scientific and technical innovation Topic : Reactivity series of metals Statement of inquiry: Knowledge - challenging discoveries evolve the periodic table's form to enhance its function of showing trends in the physical and chemical properties of elements. Inquiry questions: Factual : What do atoms look like? Conceptual : How do atoms can be structured? Debatable: What are the limits of scientific understanding in building periodic table? Mr.Nithin MYP Assessment Criteria Criterion B : Inquiring and designing Criterion C : Processing and evaluating Writing a lab report about " Reactivity of metals with water HCl" Due date is on Tuesday 1/Dec/2015 late submission will get zero mark Theory: The Reactivity Series of Metals is an arrangement of the metals in order of their reactivity starting with the most reactive metal at the top and ending with the least reactive metal at the bottom. The reactivity of a metal is determined by its ability to do a chemical reaction. Some metals are strongly reactive with water or HCl like potassium; some metals are weakly reactive such as copper. The reactivity series of metals was deduced by performing several experiments in the lab which enabled scientists to arrange metals according to their reactivity with HCl and water. The reaction of metals with HCl can be described in chemical formula: Metal + HCl Metal Chloride (salt) + Hydrogen e.g. Mg + 2HCl MgCl 2 + H 2 The reaction of metals with water can be described in chemical formula: Metal + water Metal Hydroxide + Hydrogen e.g. 2K + 2H 2 O 2KOH + H 2 The Hydrogen gas is flammable . A lighted wooden splint or lighter makes a popping sound in a test tube of hydrogen. Aims : In this investigation you will be able to: Draw reactivity series for different metals Test for hydrogen gas. Explain the reaction between metals and acid. Explain the reaction between metals and water. Compare the reactivity series for both metals with water and metals with acid. Describe the chemical reaction of metals with HCl and water. Materials 10 test tubes Test tube rack Thermometer 25 mL HCl (0.5 M) [ 5 mL for each test tube] 25 mL distilled water [ 5 mL for each test tube] Stopwatch Same size d pieces of metals ( Magnesium "Mg" , Calcium "Ca" , Aluminum "Al", Zinc "Zn" , Copper "Cu") Procedure : Follow the safety rules in the chemistry lab. Gather the following metals: metals ( Magnesium "Mg" , Calcium "Ca" , Aluminum "Al", Zinc "Zn" , Copper "Cu" ) Measure the acid's temperature (T i ) by using thermometer before you drop the metal into it. Remove thermometer then drop the metal into the test tube and start the stopwatch for 2 min. then observe and write your notes about the reaction.(e.g. number of bubbles, change the color, the metal disappears, smell .etc). [Hint: some reactions are instant you have to measure the final temperature directly no need to wait two minutes] U se thermometer to record the highest temperature (T f ) for each reaction . Record your measurements and observations in a suitable table. Repeat the same steps for each metal. Repeat the same steps (1 to 7) by using water. Record your measurements in another table. Work with your partner. Note as many changes as you can and discuss what you think is causing them. Communicate scientific information effectively using scientific language correctly. Present all the information appropriately using symbolic and/or visual representation accurately according to the chosen application . D escribe a problem or question to be tested by a scientific investigation O utline and explain a testable hypothesis using correct scientific reasoning D escribe how to manipulate the variables, and describe how sufficient, relevant data will be collected Design a logical, complete and safe method in which he or she selects appropriate materials and equipment. D iscuss the validity of the method based on the outcome of a scientific investigation D escribe improvements or extensions to the method that would benefit the scientific investigation . Part 1 : Introduction Problem statement: Which metals have a higher