Which of the following best describes a closed system in the context of Earth?

suzantalaat97

deedrah.cattousebailey

usman.mirza

mcclaytonrandle

samantha.drewett645

ldavis

vindhya.vijayakumar

cynthia_young

cristyn.saunders

binottod

fee.merces

saramar

sherry.isaacs

hoquinn

alkhadzakil

abutler

cynthia.carter

dan.witherspoon

jmattmiller16