It encouraged African-Americans to become politically active and racially conscious.
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Explanation:
The greatest effect of the European intrusion into the Americas was to increase the Indian and mestizo population through intermarriage with the whites. The primary cause of the massive population decline among native Americans after the European arrival was not warfare but disease.
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Explanation:
In September 1692 The Salem witch trials began after some girls in Salem Village, Massachusetts, said that they were possessed by the devil and blamed three women for having afflicted them a slave a beggar and an old impoverished woman. The first woman was hanged and eighteen others followed. The hysteria had extended and the public turned against the trials.
It depends what it interacts with but it makes bubbles for a chemical or physical change happening to it