All silicate minerals must contain atoms of which of these elements? select all that apply.
a. carbon
b. silicon
c. oxygen
d. hydrogen

Suppose you had to resolve the problems believed to be caused by distance decay in russia. what would you suggest?

This is a 2017 topographic map of puerto rico in the united states, and i'm sorry that people there have suffered such a disaster. i want to ask, what do the yellow dots and areas represent on this graph? and the blue area and the little blue circle, and the little blue sign that looks like a signal tower, what do they stand for?

Seasons are a result of: a.) earths rotation on its axis b.)earths tilt on its axis c.) global air circulation patterns d.) global humidity circulation patterns