Can you always see the whole illuminated half of the Moon from Earth? Why or why not?

Aseries of connections of food chain in an ecosystem is called a what

Now it's your turn to investigate human impact around the world. grab your virtual lab coat and put on your environmental science hat. you will be taking a trip around the globe to explore three locations. at each location, you will investigate the cause and effect relationships of deforestation, desertification, and urbanization. you will also gather evidence of how these factors have impacted the environment over time

Are the earth's ocean floor and continents the same age geologically? why or why not?