Fill in the blanks
energy flows in direction in an ecosystem while nutrients

How can you tell the difference between rough er from smooth er?

9. what area of study applies scientific findings to create ways for solving problems or improving life? a biogeology b mathematics c manufacturing d engineering

The big bang theory suggest that the universe is about - 300 million years old - 4.6 billion years old - 30 billion years old - 13 billion years old