global warming definition. The term attached to the notion that the Earth's temperature is increasing due to the greenhouse effect. Note: Whether global warming is actually happening is a subject of scientific debate.
Like jet airplanes, space rockets work on a principle called action and reaction (another name for Newton's third law of motion). The massive force (action) generated by hot gases firing backward from a rocket's engines produces an equal force (reaction) that pushes the rocket forward through space.
A rocket must reach escape velocity to leave Earth's orbit and escape velocity is greater than orbital velocity. What are the three main types of rockets that power modern spacecraft? What happens to the first stage of a multistage rocket? What happens to the second stage when the first stage uses up its fuel? what is the main advantage of a multistage rocket