Learn, Grow, Succeed with eVidya
Think It Over (Page 28) Q – How is the study of cells and tissues significant for understanding the life processes and human welfare? A – Studying cells and tissues helps scientists understand the natural biological processes that control how plants and animals grow, develop, and survive. By understanding these intricate processes, researchers can replicate … Read more
Think It Over Q – Why do suspended particles settle in muddy water over time but not in milk? A – In muddy water, the mud particles are quite large and heavy (it is a suspension). Gravity pulls these heavy particles down to the bottom over time. Milk, however, is a colloid. The fat and … Read more
Q: Where does a cell come from? A: A new cell comes from a pre-existing (already existing) cell through a process called cell division. When a living cell grows, it divides into new cells to help an organism grow and heal. Q: How have technological interventions facilitated the creation of new knowledge in understanding the … Read more
Intext and Activity Questions Page 2 Q1: Is every Office Memorandum a major political decision? If not, what made this one different? Answer: No, not every Office Memorandum is a major political decision. Most are routine orders issued by the government every day. This specific one was different because it announced a major policy decision … Read more
Surface Areas and Volumes – Cone, Sphere, Hemisphere 1 Right Circular Cone What is it? A right circular cone is a solid shape generated by rotating a right-angled triangle around one of its perpendicular sides. It looks like an ice-cream cone or a birthday cap. Height (h): The straight distance from the vertex (top tip) … Read more
Question Set 1 (Page 3) 1. A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (Fig. 10.3). Let us take it that the force acts on the object through the displacement. What is the work done in this case? Answer: The work done … Read more
Page 2: Activity 3.1 What happens in the reaction flask? When the solutions X and Y are mixed, they react with each other. For example, if you mix copper sulphate (blue) and sodium carbonate, a chemical reaction happens and new substances are formed. Do you think that a chemical reaction has taken place? Yes, a … Read more
In-Chapter Questions and Activities Questions from Page 30 Question: Study the cases of Ram Saran (urban case) and Lakha Singh (rural case) and discuss the following issues related to poverty: Landlessness, Unemployment, Size of families, Illiteracy, Poor health/malnutrition, Child labour, Helplessness. Answer: By looking at the stories of Ram Saran and Lakha Singh, we can … Read more
Before You Read (Page 5) Question 1: In pairs, discuss three things that you like best about your school and three things about your school that you would like to change. Write them down. Answer: Three things I like best about my school: I love meeting my friends and playing with them during the break. … Read more
Activity 5.1 (Page 50) Question: What do we observe as we look through the lens? Can we draw the structures that we are able to see through the microscope, on an observation sheet? Does it look like Fig. 5.2? Answer: When we look through the lens of the microscope, we see small structures that … Read more