First, what is a nebula?
A nebula is a cloud of dust or different elements (remember, the Space is to a big extent empty)
A planetary Nebula is a kind of nebula that is specifically formed with ionized gas that was released and surrounds a red giant star.
Answer:
The watershed simply restricts the movement of water toward one side, because the water can not move up but only down or on a flat area.
Explanation:
The watersheds represent physical boundaries that are separating the flow of water to rivers, seas, areas, or to put it simply, they direct the movement of water in different directions. The watersheds are marked by landforms that are at a higher elevation than their surroundings, and the separation of the movement of water occurs at the ridges.
Basically, the water moves downward on each side of the ridge. This means that the water on one side of the ridge belongs to one watershed as its waters go in one direction and area, while the water on the other side of the ridge belongs to another watershed because its waters move in another direction and area.
Answer:
chlorine
Explanation:
Chlorinated water safe to drink as it removes away all the types of harmful microorganism rendering it a germ free. Its used as disinfectant also.
It was important, because many fields were on the flood plains of the Nile. It was also important because the flooding of the Nile brought mineral and nutrient rich soil, which made the farming land more fertile. Without the knowledge of the flooding of the Nile, Egyptian agriculture might have been destroyed. It is still important to farmers along the edge of the Nile to this day.
<span>the grasslands of South America are a low plain, not mountainous or rain forest</span>