Atoms are the structural and functional unit of matter and a group of atoms is called molecules. Through this concept, the students will be introduced to atoms and molecules and their patterns of organisation in different state matters.
After reading the concept, students will be able to:
Each concept is explained to class 5 students using descriptions, illustrations, and concept maps. After you go through a concept, assess your learning by solving the two printable worksheets given at the end of the page.
Download the worksheets and check your answers with the worksheet solutions for the concept of Atoms and Molecules provided in PDF format.
Example:Wood, plastic, rubber, fabrics etc.
Examples:By looking, we can say that an apple is round and red whereas a chilli is green and long.
Feel: By feeling an object, we can analyse whether it is smooth, soft, hard or rough.Examples:Cotton feels soft, whereas a rock feels hard.
Smell: Every material has a unique smell that help us distinguish them.Examples:Cotton feels soft, whereas a rock feels hard.
Taste: We can also identify certain things by their tastes. However, one cannot taste all types of things.Examples:A chocolate tastes sweet, whereas a lemon tastes sour.
Density: The density of an object varies. It depends on the type of material used to make that object.Examples:A plastic ball of the same size as a wooden ball will be less dense.
Solubility: Solubility varies from substance to substance. Some substances completely dissolve in the solvent, whereas some do not dissolve instead they settle at the bottom.Examples:Salt and sugar are soluble in water, whereas chalk powder and sand are insoluble.
Density:It is the ratio of mass and volume of an object. Mass is defined as the amount of matter present in an object. Volume is defined as the amount of space occupied by an object.
Solubility: It is the ability of a substance to dissolve in a solvent.
Solvent: A solvent is usually a liquid in which other materials dissolve. Water is the most commonly used solvent.