Lesson 3

What is the final elevation if a bird starts at 20 m and changes 16 m?

A butterfly starts at 20 m and changes -16 m?

A diver starts at 5 m and changes -16 m?

A whale starts at -9 m and changes 11 m?

A fish starts at -9 meters and changes -11 meters?

One of the particles in an atom is called an electron. It has a charge of -1. Another particle in an atom is a proton. It has charge of +1. The charge of an atom is the sum of the charges of the electrons and the protons. A carbon atom has an overall charge of 0, because it has 6 electrons and 6 protons and . Find the overall charge for the rest of the elements on the list.

51.8 + -0.8

-9.2 + 4.4

-81.4 + (-12)