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From personal experience, describe whether these processes are endothermic or exothermic. Give a reason for each.
a. A charcoal briquette burns.
b. Ice melts.
c. Water evaporates from your skin.
d. Wood burns.
Answer:
a. Exothermic. A charcoal briquette releases heat as it burns.
b. Endothermic. Water absorbs the heat essential for evaporation from your skin, and your skin feels cooler.
c. Endothermic. Ice absorbs the essential heat from the environment to melt.
d. Exothermic. Wood releases heat as it burns.
1. Write an easy on the classification of Phylum Protozoa, a large phylum comprising approximately 50,000 species. (10marks)
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