SIMPLE MACHINE
+3 305 ViewsSIMPLE MACHINE Definition of Simple Machine A machine is a tool or device that makes work easier. It…
OXYGEN (O2) PROPERTIES AND USES
+1 714 ViewsOXYGEN (O2) PROPERTIES AND USES Oxygen (O2) is an active, life-sustaining component of the atmosphere; making up 20%…
RUSTING OF IRON
+1 400 ViewsRUSTING OF IRON Corrosion The eating up of metals by the action of air and moisture on their…
WATER AND HYDROGEN
+1 415 ViewsWATER AND HYDROGEN Hydrogen is the simplest element. It is the first element in the periodic table, and…
AIR AND COMBUSTION
+2 277 ViewsAIR AND COMBUSTION Percentage of Oxygen in Air We have read that Air consists mainly of molecules of…
INDICATORS
0 219 ViewsINDICATORS Red cabbage juice solution works well instead of universal indicator solution. Making Cabbage Indicator Acid base indicators…
AN ALKALI
+2 293 ViewsAN ALKALI Alkali is pronounced like alcohol, with ‘lie’ at the end instead of ‘hol’. An alkali is…
ACIDS, BASES AND INDICATORS
+1 468 ViewsACIDS, BASES AND INDICATORS Introduction All the elements in nature fall into three classes: metals, non-metals and gases.…
COMPOUNDS AND FORMULA
0 239 ViewsCOMPOUNDS AND FORMULA A compound is a pure substance formed by chemically combining at least two different elements.…
CONSTITUENTS OF MATTER
0 252 ViewsCONSTITUENTS OF MATTER Atoms, Molecules, Elements and Compounds The Atom An atom is the smallest particle of a substance…