Our Environment Ppt Download For Mac
chapter 15 Our Environment notes download in pdf which has explanation of our environment essay, how to protect our environment, our environment wikipedia, about our environment, how to keep our environment clean, how can we protect our environment, protect our environment, our environment information, essay on our environment, our environment ppt, our environment class 10, how to conserve our environment, how can we keep our environment clean, how to clean our environment, importance of environ. Our Environment Notes For Class 10 Formulas Download PDF INRODUCTION The environment includes our physical surroundings like air (or atmosphere), water bodies, soil (land) and all the organisms such as plants, animals, human beings and micro organisms like bacteria and fungi (called decomposers).
Our Environment Ppt Download For Mac Windows 10
The waste materials produced by the various activities of man and animals are poisonous to some extent and can be divided into two main groups: 1. Biodegradable wastes, and 2. Non-biodegradable wastes. Ecosystem.An ecosystem is a self-contained unit of living things (plants, animals and decomposers), and their non-living environment (soil, air and water). A forest, a pond, a lake, a greenland etc.?There are two components of an ecosystem: biotic component and abiotic component.?Biotic component: It includes three types of organisms:.Producer.Consumer.Decomposer/saprophyte.Abiotic component?Consumers can be further divided into three groups: herbivores, carnivores and omnivores.Planktons are very minute or microscopic organisms freely floating on the surface of water in a pond, lake, river or ocean. Planktons are of two types: Phytoplanktons and Zooplanktons.The microscopic aquatic plants freely floating on the surface of water are called phytoplanktons.The microscopic aquatic animals freely floating on water are called zooplanktons.
The freely floating protozoa are an example of zooplankton.The micro-organisms which break down the complex organic compounds present in dead organisms like dead plants and animals and their products like faeces, urine, etc. Into simpler substances are called decomposers.
Food Chains and Webs The sequence of living organisms in a community in which one organism consumes another organism to transfer food energy, is called a food chain. A food chain is unidirection where transfer of energy takes place in only one direction. In aquatic ecosystem of the biosphere, like fresh water ponds, lakes or sea, the food chain starts with microscopic free floating plants (phytoplankton) The various steps in a food chain at which the transfer of food (or energy) takes place are called trophic levels. The inter-connected food chains operating in an ecosystem which establish a network of relationships between various species, is called a food web. How do our activities affect the environment Global Warming The addition of certain pollutants like the carbon dioxide gases increases the temperature of the earth. The reduction in the forest cover also contributes to the heating of earth.
This is called global warming. Ozone Layer formation and importance Ozone (O3) is a molecule formed by three atoms of oxygen. Ozone, is a deadly poison. It shields the surface of the earth from ultraviolet (UV) radiation from the Sun. This radiation is highly damaging to organisms. Ozone at the higher levels ofthe atmosphere is a product of UV radiation acting on oxygen (O2) molecule. The higher energy UV radiations split apart some molecular oxygen (O2) into free oxygen (O) atoms.
The deplation of ozone layer is due to CFC (chloro fluorocarbons). SOME IMPORTANT POINTS Flow of materials in an ecosystem is cyclic but flow of energy is unidirectional. There is a continuous transfer of energy from one trophic level of organisms to the next in a food chain. Ten percent law states that only 10 percent of the energy entering a particular trophic level of organisms is available for transfer to the next higher trophic level. The increase in concentration of harmful chemical substances like pesticides in the body of living organisms at each trophic level of a food chain is called biological magnification. The disposal of waste should be done in a scientific way. There are different methods of waste disposal.
The method to be used depends on the nature of the waste. Some of the important modes of waste disposal are: (i) Recycling (ii) Preparation of compost (iii) Incineration (iv) Landfill (v) Sewage treatment.
Hi MSFT guys, You guys are really good at making a mess. After you fixing some old issues for PDF exporting in latest PowerPoint for Mac version (07), you create new issues as always. Issue 1: Gradient is not properly displayed please take a look at the comparison between the PDF created by latest version 16.20 and the one by version 16.15. the desired output. It's exported with Version 16.15 - the bad output from version 16.20 Issue 2: SVG's color properly rendered - the original SVG file in the design time (namely in the powerpoint authoring environment) - the bad exported PDF from version 16.20. Its color is darker than the original color.
Issue 3: picture pasted into the powerpoint has a gray outline. the expected output. It's exported with Version 16.15 - the bad output from version 16.20. There is gray box around the picture. I strongly suggest MSFT Office's QA team should conduct a serious internal investigation about these quality issues.
After every updates of Powerpoint for Mac, new issues are created. This is really annoying and frustrated. Regards, Jim. Hi Jim, Thank you for sharing detailed issue description in this thread, and we apologize for all the inconvenience caused by these issues. As for issue 1:Gradient is not properly displayed & issue 2: SVG's color properly rendered, there are some users reflecting they are experiencing the same situation: add the related thread here.
Issue symptom: When using a Picture or texture background for a slide and giving it transparency, the resulting PDF becomes grey even though the slide is not. Related thread: About your issue 3: picture pasted into the PowerPoint has a gray outline. We also receiv e some similar threads in this community: add the related thread here. Issue symptom: When export to pdf, there will be a border around PNG and GIF pictures on MacOS 10.14 and 10.14.1 Mojave. Related thread: We’ve confirmed that these issues can be reproduced in version 14), 29) and 03) under Mac OS Mojave and the related team has been involved for further investigation.
We will post back and keep you informed as soon as possible once we receive any updated information. Best Regards, Alex Chen.