Gravity pulls objects downward, toward the Earth’s center, so anything that flies must counteract gravity’s pull. Using forward thrust and the lift provided by wings, an airplane overcomes the effects of gravity and flie... More »

An important effect of gravity on the Earth is that the sun's gravity is responsible for the Earth's regular orbit through the solar system. The Earth travels at a velocity that approximates the force the sun exerts on t... More »

Gravity primarily affects the development of a plant by influencing the direction of the growth of its roots in relation to Earth. A plant's root system generally responds to gravitational pull by growing earthward. The ... More »

Gravity affects weight because gravity creates weight. Objects have mass, which is defined as how much matter an object contains. Weight is defined as the pull of gravity on mass. More »

Gravity attracts objects that have mass and pulls them toward the center of the Earth. Everything on Earth is held by gravity including the atmosphere. More »

Gravity is a type of force that attracts objects to one another. Objects with more mass have more of a gravitational pull than those with less mass. The pull of gravity also depends on the distance between two objects. T... More » Science Physics Motion & Mechanics

Gravitational pull is the invisible force that causes massive objects to pull other objects towards them. For instance, when a person jumps up in the air, it is the earth’s gravitational pull that causes him to return to... More »