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

suzantalaat97

deedrah.cattousebailey

usman.mirza

mcclaytonrandle

ldavis

samantha.drewett645

cristyn.saunders

vindhya.vijayakumar

cynthia_young

binottod

fee.merces

saramar

hoquinn

sherry.isaacs

alkhadzakil

abutler

cynthia.carter

dan.witherspoon

jmattmiller16