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Sort by: Rating. Atoms and Static Electricity. I made this powerpoint to teach my grade six science class about atoms and static electricity.
After the lesson, students made their own atom diagrams. I highly recommend starting the lesson off with the "Swing cereal magic trick" on static electricity! I have a lesson plan that comes with the power. ScienceGeneral Science.
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Wish List. Choose to use the traditional printable version, or the paperless, digital Google Apps version. The slides are colorful and visually appealing.Hey buddy, if you are an 8th grader and looking for some revision material for your science subject, this quiz is designed for you and anyone who wants to test their knowledge on the same. Give it a try and remember to continue revising. Have a good time. Forgot your password? Speak now. Please take the quiz to rate it.
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Remove Excerpt. Removing question excerpt is a premium feature. Which type of star is the sun? In which ocean does the 'Mariana Trench' is located? The sun is the most giant star in the universe. A stethoscope is used by:. Back to top. Sign In with your ProProfs account. Not registered yet? Sign Up. I agree to the Terms of Services and Privacy Notice.Video Format solution is also available for this academic session Choose the correct statement with respect to unicellular organisms: a in unicellular organisms, tissues work in co-ordination to perform different functions.
Read the different combinations of terms given below: The correct combination of terms with reference to an animal cell is a cell wall, cell membrane, nucleus, plastid b cell wall, nucleus, ribosome, chromosome c cell membrane, mitochondria, ribosome, chromosome d cell membrane, ribosome, mitochondria, chloroplast.
The jelly-like fluid substance present in cells is called a protoplasm c chloroplast b chromosome d cytoplasm 4. Read the following terms and select the pair that is related to inheritance of characters. The most important function of cell membrane is that it: a controls the entry and exit of materials from cells. Of the following parts of a cell listed below, name the part that is common to plant cell, animal cell and a bacterial cell.
Identify the statement which is true for cells. Which of the following feature will help you in distinguishing a plant cell from an animal cell? Which of the following statements are true for eukaryotic cells? Join the Discussion Forum to ask questions or reply to the others questions. Class 8 Science Chapter 8 in English Medium.Microorganisms are classified into four major groups mainly bacteria, fungi, protozoa and some algae. Some of the microorganisms are unicellular like bacteria, while some have well developed, multi-cellular body like moulds.
They can survive under different types of climatic environment, ranging from ice cold climate to hot summers and deserts to marshy, muddy lands. They are also found inside the bodies of animals including humans, air, water, soil, food and other things. Virus: You may be surprised to know that the viruses can be crystallized and stored like some non-living things, such as common salt and sugar. On the other hand, they multiply like living organisms when they are within a living body.
Bacteria: Bacteria are single celled microorganisms. They are put under plant kingdom because they have rigid definite cell wall like plant cells. Bacteria can be seen under microscope which enlarges their image from a hundred to thousand times.
Fungi: Fungi are non-green plants. They cannot synthesize their own food. They have to depend for their food on others.
Most fungi take their food from dead organic matter. Some live on other organisms as parasites. Algae: Algae are green substances floating on the surface of a pond, lake, river, stagnant water, moist soil, stones. They tend to grow on wet surfaces. Therefore, they can synthesize their own food. They are found in water or in very moist places.
Protozoa: Protozoa are unicellular animals. Some are free-living, others are parasites. Several parasitic protozoans cause diseases in human beings, domestic animals and plants. For example, Plasmodium, a protozoan, causes malaria. Microorganisms are commercially used for the large scale production of alcohol, wine and acetic acid vinegarwhile has medicinal uses too. Microorganisms can harmful too.
Some of the microorganisms cause diseases in humans, plants as well as in animals. Such microorganisms which cause disease are known as pathogens. Some microorganisms spoil leather, food and clothing. Food Poisoning- Food poisoning can be caused as a result of consumption of food spoilt by some microorganisms. Microorganisms that grow on our food sometimes produce substances that are toxic in nature. These make the food poisonous and can cause serious illness to living organisms. Food Preservation- Microorganisms may grow on our food and spoil it.
Spoiled food emits bad smell,bad taste and changed colour.Use template. Bauer's Seventh Grade Science. Search this site. Class syllabus. About the teacher Teacher Schedule. The following links and files are of class notes or assignments.
Animal Cell Venn Diagram.COMPLETE: Sound Class 8
Genetics Notes. Handouts The following links and files are of class notes or assignments. Items are arranged by unit. Correct habitable worlds. Lab Report RubricGrade.
Open House, Fall semester review1 1. Spring semester review Adaptations within an Ecosystem HW. Adaptation natural selection and selective breeding notes. Human hand Adaptation lab. Natural selection.Copy embed code:. Automatically changes to Flash or non-Flash embed. WordPress Embed Customize Embed. URL: Copy. Presentation Description ppt on sources of energy.
The steam is condensed by evaporation in the cooling tower and pumped down an injection well to sustain production. PowerPoint Presentation: Like all steam turbine generators, the force of steam is used to spin the turbine blades which spin the generator, producing electricity. But with geothermal energy, no fuels are burned. PowerPoint Presentation: Turbine blades inside a geothermal turbine generator.
Turbine generator outdoors at an Imperial Valley geothermal power plant in California. Dry steam fields are rare. It is still the largest producing geothermal field in the world. PowerPoint Presentation: 20 plants are still operating at The Geysers. Wastewater from nearby cities is injected into the field, providing environmentally safe disposal and increased steam to power plants.
In flash plants, as hot water is released from the pressure of the deep reservoir in a flash tank, some of it flashes to steam. Flash steam plants are the most common, since most reservoirs are hot water reservoirs. This flash steam plant is in East Mesa, California. PowerPoint Presentation: In a binary cycle power plant binary means twothe heat from geothermal water is used to vaporize a "working fluid" in separate adjacent pipes.
The vapor, like steam, powers the turbine generator. PowerPoint Presentation: In the heat exchanger, heat is transferred from the geothermal water to a second liquid. The geothermal water is never exposed to the air and is injected back into the periphery of the reservoir.
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