ClassVIII-2020-21

Dear students of class 8(1) I hope this will help you to know more about different types of changes.   When a candle is lighted, some of the solid wax first melts and turns into liquid, it is a physical change. Then it burns to produce a flame. New substances carbon dioxide and water vapour are produced along with the evolution of light and heat energy. this shows a chemical change.

Algorithm and Flowcharts

Chemistry / Matter and its Composition Matter :   Anything that has weight and occupies space and can be perceived by our senses is called matter. States of matter:   Solids: A solid has a definite shape and volume. Examples of solids include ice (solid water), a bar of steel, and dry ice (solid carbon dioxide). Liquids: A liquid has a definite volume, but takes the shape of its container. Examples of liquids include water and oil. Gases: A gas has neither a definite volume nor a definite shape. Examples of gases are air, oxygen, and helium. Plasma is recognized as fourth state of matter. Inter conversion of three states of matter: 1. Melting : Change of substance from solid state to liquid state. 2. Evaporation or boiling: Change of substance from liquid state to gaseous state. Transpiration is the evaporation of water into the atmosphere from the leaves and stems of plants 3. Condensation : change of substance from gaseous state to liquid state. 4.Freezin

Presentation on Earth Day 2020 https://drive.google.com/file/d/1VxrBw_eccQaorVUj23UviEguGKndFi38/view?usp=drivesdk

 Presentation on World Earth Day 2020 https://drive.google.com/drive/u/0/my-drive

World Earth Day video 2020 https://drive.google.com/file/d/1DPv9Qe9ACqdhtvSPWMQqLME9_sQ7ctXT/view?usp=drivesdk

What is  a Secular nation? 

https://youtu.be/4CwcT0y3XFo

    Dear students of class 8 (2) please go through all the problems and try to solve. Thank you. I hope you enjoy cube root  by solving .

Dear students of class 8 (2) are requested to solve all the problems.