Earth's systems

Artificial Waterways
100

what is the envelope of gases surrounding the earth or another planet?

What is Atomsphere?


100

What is a human-made waterway that allows boats and ships to pass from one body of water to another?

What is Canal?

200

what lies above the earth's weather and mostly changes very little?

What is Stratosphere?

200

What is a structure that can hold back water, or other liquid material?

What is Dam?

300

What is the lowest layer of Earth's atmosphere?

What is Troposphere?

300
what is a tank that is typically underground, in which sewage is collected and allowed to decompose through bacterial activity before draining by means of a leaching field?


What is septic tank?

400

What is the highest layer of the atmosphere?


What is Mesosphere?