Answer:
During high tide when the level of seawater rises, more sea water is brought into the estuary. This makes the water very salty and thus increases the percentage of dissolved salt in the estuary. Therefore, at high tide, the salinity of an estuary increases significantly.
Explanation:
E0 ellipticals are nearly circular, while E7s are very stretched out. Elliptical galaxies are made up of mostly old stars, and do not have much gas and dust. There is very little new star formation in these galaxies.
Mostly made of old stars
Answer:
Planting more trees can reduce carbon dioxide in the atomsphere and making new forests as well.
Explanation:
The trees will absorb the carbon dioxide for photosynthesis
(Sorry if this wasn't what the question meant)
Answer:
an agreement between countries covering particular matters, especially one less formal than a treaty.
Explanation:
Answer:
hill is a natural landform that extends above the surrounding terrain whereas a mountain is a large natural landform that extends above the surrounding terrain, usually forming a peak.