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Morgarella [4.7K]
3 years ago
13

Scientists believe that the first settlers to the New World came from _____.

Geography
2 answers:
guapka [62]3 years ago
8 0
Asia during the Ice Age scientist believe that humans crossed over from NorthEastern Asia to Alaska on an Ice Bridge Connecting the two "worlds".
jolli1 [7]3 years ago
4 0
Europe 
Hope this helps! :)
 
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15. What is the solar altitude on the 4th of July in Washington, D.C., at latitude 39"N? a.22.7 b.73.7 c.23.5 d.51° e.90° 16. Th
kirill115 [55]

Answer:

answer 15  correct option is b. 73.7°

answer 16 correct option is с. 47°

Explanation:

we know that on 4th july Northen hemisphere have summer and Washington, D.C also in Northen hemisphere

and sun present at 23.5° latitude

so latitude of sun is calculate as given figure below

= 90° - ( 39° - 23.5° )

= 74.5°

so correct option is b.73.7

this difference if because we take latitude 23.5°  that is approx on 24 july

but july 4 latitude will be some low

and

we know during summer declination angle is + 23.5 in N.H.

and during winder declination angle is - 23.5 in N.H.

and at spring and autumn sun is at equator

the declination angle change is

declination angle change = 27.5 + 27.5 = 47°

8 0
3 years ago
Along with Earth's crust, which portion of the<br> upper mantle forms the lithosphere?
Yuki888 [10]

Answer:That is, cooler and more rigid outer portion. The lithosphere of the Earth comprises the crust and the uppermost mantle that forms the rigid and hard outer layer of the Earth. The lithosphere is sub-differentiated into tectonic plates.

7 0
3 years ago
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