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- Does compost have any value as a fertilizer? Yes, because decomposed materials have some nitrogen, phosphorous, and potassium content even though in small amounts. The addition of garden fertilizers to speed up decomposition supplies some of the nutrients as well. Can compost be used as a substitute for fertilizer in the garden? It can be used as a source of nutrients, however, there are not enough nutrients present in the compost to supply the needs of vegetable crops and ornamental plants. The lack of large amounts of nutrients in compost is far outweighed particle size of the material being composted depends on the final use of the compost.Link: https://youtube.com/watch?v=Ehbpq56EvLk
- However, on farms and large gardens, it is doubtful whether the advantages of shredding will be sufficient to justify the additional cost and labor. In ordinary composting any particles that are too large can be forked or screened out and broken up when necessary. If the material is to be used on lawns or flower gardens, it can be screened after composting through a 1-inch or smaller screen to give it a better appearance and to make it easier to apply and work into the soil. The individual farmer or gardener may not be necessarily particular about the uniformity of the compost structure when preparing the compost. Nor is the uniformity as important for agriculture fields as for the hobby gardener. Initial shredding of all the material is not necessary in the composting operation. It is often the best practice to limit the initial shredding to large pieces of organic materials.Link: http://copa2019.saesp.org.br/cgi-bin/content/view.php?data=cxc_past_paper_questions_for_integrated_science&filetype=pdf&id=7c9062a65b29dd84af75de5590e51eba
- Some composters believe that permitting some larger irregular pieces to remain tends to create greater air spaces in the mass and entrap more oxygen. Undecomposed pieces can be screened out of the final compost and put back through the decomposing process. Vegetative and herbaceous matter should not be ground because it becomes soggy. The high moisture content of these materials makes them useful in small quantities throughout the composting process. Is it necessary to add lime calcium to the compost pile? It is not necessary, nor is it recommended. Too much lime may cause a loss of nitrogen from the pile. Most finished compost will have a near neutral pH without the addition of lime. Is it necessary to add inoculum to the compost pile to activate the composting process? Inoculation with prepared microbes may hasten the process. However, there are enough microbes present on the material being composted to initiate the process. What are the best materials for composting?Link: https://math.duke.edu/undergraduate/course-placement/faq
- Most plant material can be used for composting. Leaves are perhaps the best material because of their availability and organic content; however, other types of organic materials such as animal manures, grass clippings, vegetable refuse, small tree limbs and shrub trimmings, coffee grounds, and rotted sawdust are considered good composting materials. Do not compost diseased plants, weeds with seeds, or invasive weeds such as morning glory and nut grass; avoid composting feces, meat products, or materials contaminated with chemicals. Is it necessary to shred materials for the compost pile? The finer the material is that goes into the compost pile the quicker and more thorough the decomposition. Can a rotary mower be used to shred materials?Link: https://coursehero.com/file/23706613/Mock-Exam-2-Answers/
- Yes, it works best on dry materials that are not too woody. For example, leaves can be shredded effectively by a rotary mower. It is best to use it on a hard, level surface. What is meant by Carbon to Nitrogen ratios? When combining any organic materials to make compost, the concept of carbon to nitrogen C:N ratio is critical. The micro-organisms incompost use carbon for an energy source, and nitrogen for making proteins. The proportion of these two elements used by the micro-organisms averages about 30 parts carbon to 1 part nitrogen. Given a steady diet at this ratio they can work on organic material very quickly. The larger the number the greater the amount of carbon in proportion to nitrogen and the slower the decomposing process. Sawdust has a very high C:N ratio and decomposes fairly slowly unless some additional nitrogen is supplied.Link: https://msn.com/en-ie/lifestyle/style/svenja-moore-of-md7-talks-core-values-company-perks-and-more/ar-BB1flqWm
- How do you compost when you have too many materials that are high in nitrogen? Store high carbon materials sawdust, leaves, shredded newspaper and use them when needed. Buy peat moss and combine with the materials that are high in nitrogen. Can newspaper be composted? Yes, if shredded and mixed well with other materials. Newspaper is also a good mulching material and be placed beneath wood chips for a path. The inks used today are generally non-toxic. How do you know when compost is finished? Sifting out unfinished materials is helpful if the aesthetics are a problem. How are food scraps stored and used to make compost? Store them in sealable plastic containers and layer with sawdust to minimize odor problems. They can be used by burying them under at least eight inches of soil or turned in a hot compost. Can noxious weeds and thorny plants be composted? Yes, but care must be taken so the compost produced does not replant the weeds where they are not wanted.Link: https://jstor.org/stable/20156549
- How are noxious weeds such as morning glory, crabgrass, buttercup, ivy roots and blackberries composted? Plants that propagate vegetatively should be very thoroughly dried in the sun and then used as a compost ingredient. Or they should be composted alone and covered with black plastic to sit for as much as two years. A thorough composting in a hot system should kill most weed seeds. Can bones and meat scraps be composted? Yes, but there is too much potential for pest problems, so we do not recommend composting these materials. Can pet wastes be composted? Do not compost pet waste. Not only are they smelly, but they can be dangerous to your health. How do you balance carbon and nitrogen to make a hot pile? Learn C:N ratios of materials and balance mathematically. Learn C:N ratios of materials and balance intuitively.Link: http://scheduleit.io/interchange_3_final_exam_answers.pdf
- Use brown and green materials in approximately equal proportions. Can wood ashes be added to the compost pile? Yes, but in limited quantities. Can sod be composted? Yes, stacked in a pile, grass side down, kept moist and covered with black plastic. It can take up to two years to fully compost. A sunny spot is best because the heat of the sun speeds decomposition. However, the pile also dries out faster and requires more frequent watering than a pile in the shade. When is a pile too small to heat up?Link: https://coursehero.com/file/p7fqv32/The-purpose-is-to-measure-against-an-annual-Performance-Ratio-guarantee-52/
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- Know the Science exam is complex and you'll generally have to dig deep into your studies and knowledge for the correct answers. NCERT solutions are the best study material for those students having trouble in finding the answers for different questions related to the This course is designed to prepare students for high The included softbound Apologia Physical Science Solutions and Tests Manual answer key contains answers to the study guides, tests, and Flag for Inappropriate Content.Link: https://brainly.in/question/37728330
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- Chapter-wise NCERT Solutions are provided everywhere on the internet with an aim to help the students to gain a comprehensive understanding. Class 7 Science Chapter 6 solution Hindi mediums are created by our in-house experts keeping the understanding ability of all types of candidates in mind. NCERT textbooks and solutions are built to give a strong foundation to every concept. Upon visiting the website, you have to register on the website with your phone number and email address. Then you will be able to download all the study materials of your preference in a click. You can also download the Class 7 Science Physical and Chemical Changes solution Hindi medium from Vedantu app as well by following the similar procedures, but you have to download the app from Google play store before doing that. The best feature of these solutions is a free download option.Link: https://quantifiedbob.com/water-fast-72-hours/
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- Reaction between vinegar and baking soda. Burning of a matchstick. Explosion of a cracker is a chemical change Explain. Answer: When we burn a cracker, it explode Explosion produces heat, light, sound and unpleasant gases that pollute the atmosphere. Many new products are formed. So, it is a chemical change. Question Why cannot a chemical change be normally reversed?Link: https://bowiestate.edu/academics/colleges/college-of-business/departments/management-marketing-and-public-administration/programs/mpa-program-student-guiderevision2011-revised-1.pdf
- It can also be prevented by galvanisation. Decaying of fruits causes health hazards. Due to decaying of fruits, there is a lot of monetary loss in food industry. Prevention Fruits can be preserved by keeping them at low temperature and by using some specific preservatives. What happens when an iron blade of a knife is dipped in a copper sulphate solution?Link: https://martinamatteo.it/neck-soap-note.html
- What kind of change takes place? HOTS] Answer: When an iron blade of a knife is dipped in a copper sulphate solution, then iron blade is coated with reddish brown deposits of copper. And the blue colour of copper sulphate solution changes to light green due to the formation of iron sulphate. Answer: a Chemical reaction between copper sulphate solution and iron metal. In this reaction, blue colour of copper sulphate solution changes to light green colour due to the formation of iron sulphate.Link: https://storage.googleapis.com/wzukusers/user-16668366/documents/59fb47004344fM8gfzAq/Midterm1-Mst109.pdf
- Explosion of a firework is a chemical change. Question 2. Rahul was a student of Class VII. His father purchased a new bicycle for him on his birthday. After few months, he found that the cycle chain and even the handle gets rusted. His father advised him to apply a coating of paint to the cycle and not to keep it in the open in future. Now, answer the following questions: a Why his cycle gets rusted? As air contains both oxygen and moisture. Thus, in the presence of oxygen and water, his cycle slowly gets rusted. This is called rusting of iron. Question 3. In the summer holidays, Karan went to Rann of Kutch in Gujarat with his parents. Karan was aware that in the coastal regions of India especially in the Rann of Kutch common salt is obtained from sea water.Link: https://muharrembalci.com/guide-Reliable-Test-Questions-516262/DA-100-exam.html
- Karan was very excited to see that place. He requested his father that he want to see the process of obtaining salt from sea. His father helped him and they went to see the place where common salt was collecting. And he also explained the whole process. Karan was very happy to see the process. Now, answer the following questions. It is then allowed to evaporate in the sun. As, the water evaporates, the salt solution becomes supersaturated concentrated. This supersaturated solution cannot hold the excess salt. Thus, it separates out in the form of salt crystals.Link: https://chs.org/event/coffee-hour-with-chs-can-you-pass-the-citizenship-test/
- These salt crystals are collected and are redissolved in water and filtered to remove insoluble impurities. The clear solution is again evaporated to obtain the crystals of pure salt. Question 4. When baking soda is mixed with vinegar, bubbles are formed with the evolution of a gas. Name the gas evolved. What happens when this gas is passed through lime water? The change in the test tube is as follows: Carbon dioxide gas produced in the reaction passing through freshly prepared lime water as shown in figure.Link: https://social.technet.microsoft.com/forums/exchange/en-US/cbf02315-75cb-4fb6-8863-3a82648e8f1a/exchange-ndr
- Lime water is calcium hydroxide solution. When carbon dioxide gas is passed through lime water, then calcium hydroxide combines with carbon dioxide to form a white solid substance, calcium carbonate which makes lime water milky. This chemical change can be written in the form of word equation as follows: The reaction between lime water and carbon dioxide gas is a chemical change because a new substance calcium carbonate is formed during this change. The turning of lime water into milky is a standard test of carbon dioxide. When baking soda NaHC03 reacts with vinegar which contains acitic acid carbon dioxide comes out, which turns lime water milky, therefore it is a chemical change.Link: https://ekg.academy/ECG-axis-determination
Tuesday 25 May 2021
Physical Science Chapter 6 Test B Answers
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