Question

রাসায়নিক পরিবর্তন ঘটলে কী কী দেখে / আনুভব করে তা বােঝা যেতে পারে ?​

Answer 1

Explanation:

good talk aa jao jaldi se ,✌️✌️✌️✌️✌️✌️

Answer 2

Answer:

Science is what we do to find out about the natural world. Natural sciences include, chemistry, biology, geology, astronomy, and physics. Science uses mathematics and logic, which are sometimes called "formal sciences". Natural science makes observations and experiments.