Extraterrestrial bodies, specifically the stars
The Columbian Exchange greatly affected almost every society on earth, bringing destructive diseases that depopulated many cultures, and also circulating a wide variety of new crops and livestock that, in the long term, increased rather than diminished the world human population
<span>B.
Tropical climates have four distinct seasons.
Tropical climates do not have the standard 4 seasons seen in temperate climates.</span>
<u>Answer:</u>
<em>Formation of Warm front happens when warmer air mass pushes a cooler air mass.
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<u>Explanation:</u>
When warm air mass converged or coalesced with cold air mass then there is formation of fronts. Warm air front is gentle sloping front when two air masses move towards to each other warm and moist air aggressively then actively overrides the cold air front then the resultant front is Warm air front. Weather associated to Warm fronts happens when sky is overcasted with the Nimbostratus clouds, moderate rainfall, mild weather and so on.
Answer:
Depending on the amount of liquid he has, he can use it to fill each test tube. he can do 8 orders per test tube :D