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Changes of State: A Simple Guide

Matter can exist in three main states: solid, liquid, and gas. But did you know that matter can change from one state to another? This process is called a "change of state."

When you heat a solid, like ice, it melts and becomes a liquid (water). If you heat the water further, it evaporates and turns into a gas (steam). These changes happen because heat energy makes the particles in matter move faster and spread apart.

But what happens when you cool the steam? It condenses back into water, and if you cool it even more, it freezes into ice again. So, changes of state can go both ways: heating causes melting and evaporation, while cooling leads to condensation and freezing.

Can you think of an everyday example where you see a change of state happening?

Send me your answer to be checked.
Atai rabby

AS level question. Answer if you can.

O level, A Level chemistry in Chittagong.

15 years of teaching experience plus working school teacher for 10 years as senior teacher. Cambridge trained teacher with online question bank and notes.

Are you a candidate for Chemistry in 2023? Do you want an A* in your upcoming exam? Have you think of doing a better preparation ?

If your answer is yes then this course is for you!

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Preparation for O Level exam is easier when you solve past papers and give mock test with custom questions. It is essential if you are in class 10, It makes you far more confident with boosting your class result if you are in class 9. Even if you are in class 8 you should solve topic wise all relevant past paper questions.

❏ Parents Guide:
আপনি কি আপনার সন্তানের রেজাল্ট নিয়ে চিন্তিত ? আপনার কি মনে হচ্ছে তার প্রিপারেশনে ঘাটতি রয়েছে ?তাহলে অবশ্যই আপনার সন্তানকে পাস্ট পেপার সলভের এই কোর্সটি করান। কোর্স শুরু হলেই বুঝবেন আপনার সন্তানের জন্য এবং তার রেজাল্টের জন্য কত জরুরী ছিল এই কোর্সটি কারণ ও লেভেল পরীক্ষায় টপিক বোঝার মতই প্রশ্ন বোঝাও সমান গুরুত্বপূর্ণ এবং তার জন্য অবশ্যই পাস্ট পেপার সলভ করতে হবে।

Solving topical past questions along with topics is the most effective preparation method.

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