In order to for astronauts to be self-sufficient (requiring no outside supplies from earth) on a space station or other planets, what do they need? List and explain the necessary thing needed to create a closed ecosystem. Describe the role each thing you have listed will play.

Explanation:

1. Oxygen, without oxygen no human can live, In space, there Is zero oxygen

2. Water, Astronauts will definitely need some sort of water since nearly every living thing requires It

which elements do geologists measure to determine the age of an organism’s remains? check all that apply.

carbon-14

nitrogen

carbon-12