Answer:
The correct answer is the third statement.
Explanation:
This is because the first and last statements are completely incorrect as irrigation systems had to do with routing water from streams and lakes, into farms in order to hydrate plants. The second answer is technically correct in my opinion, because once flood season came farmers used irrigation lines to re-route water to reservoirs or other places besides their farms. Although, this was not the main purpose of irrigation systems.
The correct answer is - D. volcanic eruptions.
In recent studies and research about the water on our planet and how it came to be, the scientists managed to find new evidence that suggest that not only the comets and asteroids contributed to the existence of water on our planet, but also the volcanoes.
The volcanoes are actually releasing into the atmosphere the material from the deeper part of the Earth, the mantle layer. The mantle layer, as it turns out, has water in its rocks, so through the volcanic eruptions, that were much more and much bigger in the distant past, that water got released into the atmosphere. From the atmosphere, that water was falling on the surface, thus contributing to the creation of the first oceans on Earth.
Answer:
N₂
Explanation:
The primary greenhouse gases in the atmosphere are carbon dioxide, methane, nitrous oxide, water vapour and ozone. These gases allow sunlight to reach the Earth's surface unhindered. The sunlight heats the surface. The heat as infrared reradiated to the atmosphere, the greenhouse gases absorb the heat energy. They do not allow heat to escape back trapping' the gases in the lower atmosphere.
Nitrogen is an inert gas present in the atmosphere is about 78%.
Only some nitrogen-fixing bacteria such as Rhizobium which fixes atmospheric nitrogen into the soil.
Thus, N₂ (nitrogen) is not a greenhouse gas.
Small rivers and streams around the Colorado River drain into the river and eventually to the ocean.
Explanation:
The Colorado River is a major river in the United States. This river runs through the southwestern part of the country, mostly through semi-arid and arid areas. The Colorado River starts its flow in the state of Colorado, continues its flow through Utah and Arizona, then leaving the United States and having a short span in Mexico until it enters the Gulf of Mexico. The river is fed with water through numerous smaller rivers and streams, which makes it larger and larger gradually, and all that water enters the ocean at the end.
- Some of the tributaries of the Colorado River and Green, San Juan, Little Colorado, and Gila.
- All of these rivers have their own watersheds, all of which are small, but they all together fall into the large watershed of the Colorado River.
- The Colorado River is very important river in the region, especially when it comes to agriculture.
- The most famous thing about the Colorado River is that in one part of it is located the world famous Grand Canyon, which is a major tourist attraction.
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