Question 1 What happens when crystal of potassium permanganate is dissolved in water ? Question 2 How will you show that matter us made up of particles ? Question 3 How will you show that particles of matter are in motion ? Evidences of particle in matter and their motion Most of the evidences of particles in matter and their motion comes from the experiments on … [Read more...] about Evidences of Particle in Matter and their Motion
Class 9
Evaporation
Question 1 Define Evaporation ? Question 2 What is the effect of temperature on rate of evaporation ? Question 3 Why does our palm feel cold when we put some acetone or perfume in it? Question 4 What type of clothes should we wear in summers and why. Question 5 How does the water kept in an earthen pot become cold during summers. Question 6 Why does a desert … [Read more...] about Evaporation
Green House Effect
Question 1 What is green house effect? Question 2 Name green house gases? Question 3 What is global warming? Question 4 What are the effects of global warming? Green House Effect A building mostly made of glass for growing or sheltering the delicate plant is called greenhouse. The glass of wall of greenhouse allow sun rays to pass into the interior right upto … [Read more...] about Green House Effect
Soil
Question 1 Define the term Paedogenesis? Question 2 What do you mean by weathering of soil? Question 3 How sun causes weathering of soil? Question 4 How Water causes weathering of soil? Question 5 How wind causes weathering of soil? Question 6 What are the chemical methods of weathering of soil? Question 7 What are the biological methods of weathering of … [Read more...] about Soil
Water
Question 1 How does water get polluted? Question 2 Why is water essential for life? Question 3 Define water pollution? Question 4 What are the sources of water pollution? Question 5 What is the full form of BOD? Question 6 What are the harmful effects of water pollution? Question 7 What is BOD? Water The ocean,rivers,streams,lakes,ponds,pools,polar ice … [Read more...] about Water