Question

Which of the following is an example of a closed system?

A)
the Earth system
B)
the ocean
C)
an ecosystem
D)
a biome
E)
material or energy that is able to move in or out of a system

Answer 1

A, the Earth system

Step-by-step explanation:

The boundary would be the atmosphere, as energy cannot leave. No mass is shared between the rest of the universe and Earth

Answer 2

A, the earth system
The boundary would be the atmosphere, as energy cannot leave. No mass is shared between the rest of the universe and Earth