Question

The exosphere is the layer of the atmosphere

Answer 1

where gas molecules can be exchanged between Earth's atmosphere and outer space.

Step-by-step explanation:

The exosphere is the outermost layer of earths atmosphere. The exosphere goes from about 600 km to over 10,000 km above earth's surface. The exosphere is basically the transitional area between the atmosphere and space, so gas molecules end up getting exchanged.

Answer 2

Yes you're correct. It is the outermost part of the atmosphere, artificial satellites are in that layer.