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CBSE 9th Science | Matter around us: Concept review
CBSE 9th Science | Matter around us: Concept review QUICK CONCEPT REVIEW SUBSTANCE (OR CHEMICAL SUBSTANCE): A “substance” is a kind of matter that can not be separated into other kinds of matter by any physical process, e.g. gold, silver, iron, sodium chloride, calcium carbonate etc. [NOTE: Most of the naturally occurring materials on…
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Practice Exercise on Matter-Its Nature and Behaviour
Practice Exercise on Matter-Its Nature and Behaviour FILL IN THE BLANKS: 1. Matter is made up of…………………………… 2. Evaporation cause……………………………… 3. The smell of perfume gradually spread across a room due to ………………………. 4. …………………………..is the change of gaseous state directly to solid state without going through liquid state and vice-versa. 5. Rapid evaporation depends…