A. read the following sentences. decide if the words in bold are the cause or the effect on the line. then, underline the "signal" word or phrase 1. early man used weapons because they needed to find food 2. the glaciers began to melt; therefore, the land bridge between asia and north america became flooded 3. because they wanted to learn about differenct civilizations that existed , archaelogists studied artifacts. 4. early man slowly started to grow food ; and as a result, their lives became easier 5. my sister was very tired because she stayed up past midnight ANSWER 1. they needed to find food : cause // signal : "because" 2. the land bridge between asia and north america became flooded : effect // signal : "therefore" 3. because they wanted to learn about differenct civilizations that existed : cause // signal : "because" 4. early man slowly started to grow food : cause // signal : "as a result" 5....
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