Question 1 State few properties of Carbon Dioxide gas? Question 2 From where does dust enter into the air? Question 3 Why should we breathe through the nose and not through the mouth? Question 4 What is smoke? How is smoke produced? Question 5 Explain why, tall chimneys are installed in factories? Question 6 Why do traffic policeman often wear mask at a crowded … [Read more...] about Carbon Dioxide, Water Vapours and Smoke
Class 6
Oxygen and Nitrogen
Question 1 State few properties of Nitrogen? Question 2 State few properties of oxygen? Question 3 Why do mountaineers carry oxygen cylinders with them while climbing high mountains? Question 4 How will you show that oxygen or air is necessary for burning? Question 5 Explain why, if the clothes of a person catches fire accidentally, he is covered with a woollen … [Read more...] about Oxygen and Nitrogen
Composition of Air
Question 1 What is air? State the composition of air? Question 2 Write few properties of air? Question 3 Describe an activity to show that a glass bottle which appears to be empty to us is actually filled with air? Question 4 How will you show that air is a mixture of gases? Question 5 What is atmosphere? Question 6 Why do mountaineers carry oxygen cylinders with … [Read more...] about Composition of Air
Conservation of Water
Question 1 What are the two main techniques of rainwater harvesting? Question 2 How is rain useful to us? Question 3 Why is it essential to conserve water? What are the various ways in which you can conserve water? Question 4 What is meant by rainwater harvesting? Question 5 Describe methods of rain water harvesting ? Question 6 Why ocean water is not fit for … [Read more...] about Conservation of Water
Water Cycle
Question 1 What happens if it does not rain in a region for a year or more? Question 2 What is the importance of water cycle in nature? Question 3 Describe the water cycle in nature? Question 4 Explain how heavy rain cause flood? What damage is caused by floods? Question 5 What is drought? When does drought occur? Question 6 What are the problems faced by the … [Read more...] about Water Cycle