earth science 12th edition questions and answers

To avoid the risk of electric shocks, the metal of an electrical appliance is 'earthed'. Earthed means to connect the metal case of the appliance to the earth (at zero potential) by means of a metal wire (copper) called the earth wire. One end of the ea..

Structure of the earth system Earth's history Earth in the solar syste..

Structure of the earth system Earth's history Earth in the solar syste..

Properties of earth materials Objects in the sky Changes in earth and sk..

Let m be the mass of a body on Earth. Its weight on Earth is given by the equati..

Question: Define solar constant. Answer: The amount of solar energy received per second by 1m 2 area of the earth's surface at an average distance between the sun and the earth. It's value is 1.4 kW/m 2..

Question: What do you mean by a freely falling object? Answer: An object which moves towards the earth due to force of gravity is described as a freely falling object..

The addition of certain pollutants like the carbon dioxide gases increases the temperature of the earth. These gases remain close to the surface of earth, forming an insulating laye..

Is the object which moves towards the Earth due to force of gravit..

Question: What is the main cause for winds to blow? Answer: Due to unequal heating of the earth's surface there is a difference in pressure in the atmosphere. The air moves from region of high pressure (cold region) to the region of low pressure (hot region)..