Points to Remember, Glossary, Concept Map

Points to Remember

• Anything which occupies space and has mass is called matter.

• Material which has a definite shape and definite volume at room temperature with any number of free surfaces is called solid.

• The molecule of a substance that contains two or more atoms of different elements combined together in a definite ratio, is said to be a molecule of a compound.

• Material which has a definite volume, but no definite shape and has one free surface, is called liquid.

• Material which has neither definite shape nor definite volume, is easily compressible and has no free surface is called gas.

• Metals are elements that are hard and shiny in appearance. Some metals used in our daily li fe are iron, copper, gold, silver, etc. Metals conduct heat and electricity.

• Elements that generally do not shine, that are neither too hard nor too soft are non-metals. All gases are non-metals. Some non-metals are sulphur, carbon, oxygen etc.

• Elements which have the properties of metal and non-metals are called metalloids. Some examples are arsenic, germanium etc.

• On being hit, metals produce a typical sound. They are said to be sonorous.This property is being made used in making temple bells.

• The easiest way to represent the element and to write the chemical formula is using symbols.

GLOSSARY

1. Disinfectant Chemical substance which kills or prevents the disease causing microorganism.

2. Semiconductor Substance which acts as bad conductor at low temperature and as good conductor at high temperature.

3. Reducing agent Substance which undergoes oxidation reaction.

4. Carbohydrate Compound which contains carbon, hydrogen and oxygen.

5. Bleaching agent Substance which is used to remove the colour.

6. Preservative Substance which prevents food being spoiled by microorganism.

Concept Map

REFERENCE BOOKS

1. Suresh S, Keshav A. “Textbook of Separation Processes”, Studium Press (Inda) Pvt. Ltd (ISBN: 978-93-80012-32-2) , 1-459, 2012.

 2. Biochemical Techniques Theory and Practice Paperback – 2005 by Robyt J.F. ISBN 10: 0881335568 / ISBN 13:9780881335569 Published by Waveland Press, Inc. , Prospect Heights, IL, 1990

 INTERNET RESOURCES

https://schools.aglasem.com/1747

https://www. chem1. com/acad/webtext/ pre/pre-1. html

ICT CORNER

Matter around us

This activity enables the students helps to know about the States of Matter

Steps

• Open the Browser and type the URL link given below (or) Scan the QR Code.

• Select the title “States of Matter: Basics”

• States of Matter: Basics display on the screen. Follow this Experiment

• Click the next and to know about this states of matter

Cells alive

URL:https://phet.colorado.edu/sims/html/states-of-matter-basics/latest/states-of-matter-basics_en.htm (or) scan the QR Code