3.

3. While watching the video answer the following questions:

1.              What is gravity?

2.              What does every massive object in the universe attract?

3.              When did Isaac Newton discover that the strength of the gravitational force decreases by the square of the distance between two objects?

4.              What else did he discover?

5.              Do we notice the pull of the Moon?

6.              What does the Moon gravity causes?

7.              What else does gravity attract?