10-Science

Management of Natural Resources Page: 271 1. What changes can you make in your habits to become more environment-friendly? Solution In order to become more …

Our Environment NCERT Questions Question 1.Why are some substances biodegradable and some non-biodegradable? Answer.Substances: The substances that are broken down by biological processes, such as the …

Sources of Energy NCERT Questions Question 1.What is a good source of energy? [2010,2013] Answer.A good source of energy has the following characteristics: It should be …

Magnetic Effects of Electric Current NCERT Questions Question 1.Why does a compass needle get deflected when brought near a bar magnet? Answer.This is because of …

Electricity  Page: 200 1. What does an electric circuit mean? Solution: A continuous closed path made of electric components through which an electric current flows …

Human Eye and Colorful World NCERT Questions Question 1.What is meant by power of accommodation of the eye? [2010,2012,2014,2015] Answer.The images of objects at different distances …

Light Reflection and Refraction NCERT Questions Question 1.Define principal focus of a concave mirror. Answer.It is a point on the principal axis at which parallel …

Heredity and Evolution NCERT Questions Question 1.How do Mendel’s experiments show that the traits may be dominant or recessive? Answer.Mendel’s Experiments:  Monohybrid Inheritance (One Visible Con¬trasting …

How do Organisms Reproduce NCERT Questions Question 1.What is the importance of DNA copying in reproduction? Answer.DNA or deoxy ribonucleic acid is the genetic material …

Control and Coordination NCERT Questions Question 1.What is the difference between a reflex action and walking? Answer.A reflex is an involuntary, rapid response to a …