high-level heat source

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Orange basketball on black background and with low key lighting. Homepage 2010, arts and entertainment, history and society

The 10 Greatest Basketball Players of All Time

Ice Sledge Hockey, Hockey Canada Cup, USA (left) vs Canada, 2009. UBC Thunderbird Arena, Vancouver, BC, competition site for Olympic ice hockey and Paralympic ice sledge hockey. Vancouver 2010 Olympic and Paralympic Winter Games, Vancouver Olympics

10 Best Hockey Players of All Time

The impeachment trial of Pres. Andrew Johnson, illustration from Frank Leslie's Illustrated Newspaper, March 28, 1868.

What If the President Is Impeached?

The Battle of Gettysburg, July 1-3, 1863. (Civil War, Pennsylvania)

9 Worst Generals in History

Aspirin pills.

7 Drugs that Changed the World

The Belgian pride parade 2017. People marching through Brussels streets with LGBT flags and posters.

How Did the Rainbow Flag Become a Symbol of LGBTQ Pride?

Dr. Martin Luther King Jr. addresses marchers during his "I Have a Dream" speech at the Lincoln Memorial in Washington. August 28th 1963

Was Martin Luther King, Jr., a Republican or a Democrat?

high-level heat source

meteorology

Learn about this topic in these articles:

thunderstorm generation

In thunderstorm: Vertical atmospheric motion
Mountains also act as high-level sources of heat and instability when their surfaces are heated by the Sun.
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