Gravity is the force that pulls all elements of matter together. Matter refers to things you can physically touch. The more matter there is, the greater the amount of gravity or force. This means that the Earth or other planets have a great deal of pull and that everything on Earth is pulled back to Earth.
The Immigration Act of 1965 begin to change the composition of the American population by more openly allowing immigrants from all parts of Europe, Asia, and Africa to enter the US.
