Answer: Ectotherms depend mainly on external heat sources, and their body temperature changes with the temperature of the environment. Animals exchange heat with their environment through radiation, conduction—sometimes aided by convection—and evaporation.
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To aid us in understanding a time in history
To aid us in understanding a person or culture
Highest of most successful point
Answer:
secondary source
Explanation:
An encyclopedia entry about the Battle of Gettysburg is considered a secondary source of information.
The Battle of Gettysburg was fought from July 1 to July 3, 1863, in and around the town of Gettysburg, Pennsylvania, by Union and Confederate forces during the American Civil War. The battle involved the largest number of casualties of the entire war and is often described as the war's turning point.
An encyclopedia is considered a secondary and even tertiary source. It is secondary because it does not include first-hand account of the (historical) events, and it is considered tertiary because it mostly quotes/cites other secondary sources such as journals, newspaper articles, books etc.
A primary source consists of only first-hand accounts of the experiences and events.
A secondary source consists of analyses, critical essays about first-hand accounts (primary sources).
