În timpul unei eclipse de Lună, Pământul trece între Lună și Soare, determinând Pământul să-și arunce umbra asupra Lunii.
Veți observa că umbra pe care o produce este rotundă. Chiar dacă Pământul ar fi plat, dar în formă de disc, nu ar arunca nici acest gen de umbră. „Singura formă care poate produce o umbră curbată, indiferent din ce direcție este plasată lumina, este o sferă”, explică Thaller.
The main stems
of 38 rivers in the United States are at least 500 miles (800 km) long.
The main stem is "the primary downstream segment of a river, as
contrasted to its tributaries".[1] The United States Geological Survey (USGS) defines a main-stem segment by listing coordinates for its two end points, called the source and the mouth. Well-known rivers like the Atchafalaya,[2] Willamette,[3] and Susquehanna[4] are not included in this list because their main stems are shorter than 500 miles
You should study earth science because you will learn how scientists can determine how old rocks are and you will know about the earth better.
Answer:
my explaination is my answer
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Explanation:
Flash floods are dangrous because
they have the destructive power of a normal flood combined with raging water, in addition to being unpredictable. Each year in the U.S., floods kill more people than hurricanes, tornadoes or lightning.
