The Atom We learned early that matter is made up of small, indivisible particles. Everything around us is ...
A fuel is a substance that can be combusted or burnt to release energy as a byproduct. The ...
Occurrence and Nature of Water The Occurrence and Nature of Water Describe the occurrence and nature of water ...
Hydrogen is the lightest of all the elements. There is very little hydrogen in the earth’s atmosphere. Hydrogen ...
Oxygen exists in air to an extent of 21% by volume (or 23% by weight). It is the ...
Composition of air Air is a mixture of different gases. The gases that make up the air include ...
Concept of matter Concept of Matter Explain concept of matter Matter is anything that has mass and occupies ...
Significance of scientific procedure The Concept of Scientific Procedure Explain the concept of scientific procedure The scientific method ...
Heat sources Most chemical reactions require heat to proceed. It is therefore important to have sources of heat ...
A laboratory is a room or building specially designed for conducting various scientific experiments. An appropriate school laboratory ...