If atoms are made of smaller parts such as electrons why are atoms considered the basic unit of matter

The magnitude of an earthquake is typically calculated according to the scale.           a. mercalli   b. fujita   c. richter   d. saffir-simpson  

Amountain range known as the southern alps runs through the center of the south island. what type of mountains do you think the southern alps are? explain your answer. .

Your'e sent a set of coordinates for the city of bejing. the coordinates are 39 degrees north latitude and 116 degrees east longitude. what do these numbers tell you about