Revision Notes for CBSE Class 6 Science Chapter 6 - Free PDF Download
FAQs on Changes Around Us Class 6 Notes CBSE Science Chapter 6 [Free PDF Download]
1. What are the changes around us?
A change is implied as to any transition or modification in the original form of a substance. Chapter 6 “Changes Around Us” of Class 6 Science explains the various processes involved in the changes that occur in the environment around us. They describe the processes that lead to changes like evaporation, boiling, freezing and condensation. A few examples of the changes occurring around us have been illustrated in the chapter such as seasonal change, changes in weather, and rusting of metals.
2. What is a change according to Chapter 6 “Changes Around Us” of Class 6 Science?
Chapter 6 “Changes Around Us” of Class 6 Science explains the changes that happen around us and the several processes involved in the cause of change. The chapter makes us aware of the different changes that occur in our surrounding environment and the different processes involved in the change. The process of change has been defined in the chapter as any transition, alteration, modification in the original or natural form of a substance by processes such as evaporation, boiling, condensation, freezing, expansion, and contraction.
3. How many types of changes are there as mentioned in Chapter 6 of Class 6 Science?
The process of any transition in the form of a substance has been defined as a change in Chapter 6 “Changes Around Us” of Class 6 and based on this definition, there are two types of changes. The first type of change is Physical change, in which the physical properties of a substance like its shape, size, colour or appearance, undergo a transition. The second type of change is Chemical change, in which one chemical substance transforms into one or more different substances.
4. How does change occur as given in Chapter 6 of Class 6 Science?
Change means any kind of transition in the original form and state of a substance. The transitions and changes in any substance occur due to various processes, such as evaporation in which water changes into vapour, melting, in which solid turns into liquid, freezing, in which a liquid substance becomes solid, condensation, in which the vapour returns into the liquid state upon cooling, expansion, in which an object expands in size, and contraction, in which an object shrinks in size. To know more students can visit the Vedantu app or website.
5. What is meant by reversible and irreversible change?
According to the definition of Chapter 6, change is perceived to be any transition in the original aspect of any substance. Based on this definition, changes are characterised as reversible and irreversible changes. Reversible change is the kind of change that can be undone or reversed to its original state, for instance, inflating and deflating a balloon. Irreversible change, on the contrary, means a change that can not be reversed and is permanent, for example, the burning of an object. To know more about this chapter, students can download the revision notes free of cost from the Vedantu website.