ICSE Class 7 Chemistry, Unit 3: Elements, Compounds and Mixtures
From the CISCE curriculum. 8 key concepts, about 4 days of study at 20 to 30 minutes a day.
What this unit aims at
(experimental techniques) This theme will enable children to understand that the earth mainly consists of mixtures containing elements and compounds. These are of different types and many a times the separation of components of mixtures is required for practical utility. They will also know about and discuss the different techniques for separation of the components of a mixture to get the pure components.
Your child should be able to
- identify elements and compounds on the basis of their properties and the type of atoms present in them
- differentiate between mixtures and compounds on the basis of their properties and composition of constituents
- provide examples of elements, compounds and mixtures from daily life
- discuss different techniques for separation of components of mixtures
- justify the reason for the use of a particular technique in separation of a mixture
- explain chromatography and its importance
Key concepts in this unit
- Identification of elements, and compounds from representation of their symbols and formulae.
- Mixtures and compounds: difference between mixtures and compounds on the basis of the chemical composition of constituents.
- Recall that a mixture is formed when two or more substances are mixed in any proportion such that their particles are in intimate contact with one another without
- undergoing a chemical change.: Types of mixtures: - Homogeneous & Heterogeneous mixtures
- undergoing a chemical change.: On the basis of State: Solid –solid; Solid-liquid; Liquid-liquid.
- undergoing a chemical change.: Separation techniques: evaporation, distillation, use of separating funnel, sublimation, fractional distillation.
- undergoing a chemical change.: Examine the principle behind each separation technique.
- undergoing a chemical change.: Chromatography as a separation technique; Paper chromatography.
Teach this unit at home
- A day-by-day plan from the CISCE concepts, so you know what to cover each day.
- A step-by-step script for each day, so you know what to say and ask (AI-written from the CISCE curriculum, so check it against your child's school book).
- A quiz at the end.
From the CISCE Curriculum for Classes I to VIII (2016). CISCE sets what is taught, not the textbooks, so schools use different books and there are no page numbers here. Adhian Gurus is not affiliated with CISCE.