* Force: A push or pull that can change an object's motion.
* Attraction: Gravity always pulls objects towards each other, never pushes them apart.
* Mass: A measure of how much matter an object contains. The more mass an object has, the stronger its gravitational pull.
Key Points about Gravity:
* Universal: Gravity affects everything in the universe. Even you are pulling on your phone, and your phone is pulling on you, though the force is incredibly small.
* Dependent on Distance: The further apart two objects are, the weaker the gravitational force between them. This is why you don't feel the pull of the Sun, even though it has a huge mass.
* Explained by General Relativity: Albert Einstein's theory of general relativity is our best understanding of gravity. It describes gravity not as a force but as a curvature in the fabric of spacetime caused by mass and energy.
Examples of Gravity in Action:
* Falling Objects: An apple falling from a tree, a ball thrown in the air.
* Planets Orbiting the Sun: The Sun's gravity keeps the planets in their orbits.
* Tides: The Moon's gravity pulls the Earth's oceans, creating tides.
Understanding gravity is crucial to understanding the universe and many aspects of our daily lives.
