Answer the following question given this paragraph: Insects are the only invertebrates than can fly. Flight is the main reason for their success. Q: The only invertebrates than can fly belong to what broad group, which is highly successful? Choices: - spiders - birds - bats - insects A:
insects
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Answer the following question given this paragraph: Sodium and chloride ions have equal but opposite charges. Opposites attract, so sodium and chloride ions attract each other. They cling together in a strong ionic bond. You can see this in row 2 of Figure above . Brackets separate the ions in the diagram to show that the ions in the compound do not share electrons. You can see animations of sodium chloride forming at these URLs:. Q: Why do sodium and chloride ions attract each other? Choices: - sulfides attract - magnetism - like attracts like - opposites attract A:
opposites attract
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Answer the following question given this paragraph: respiratory system disease in which air passages of the lungs periodically become too narrow, making breathing difficult. Q: What makes breathing difficult due to respiratory system disease? Choices: - weak lungs - slippery air passages - water in the lungs - narrow air passages A:
narrow air passages
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Answer the following question given this paragraph: Iodine is added to alcohol and used as an antiseptic. It reacts with germs on cuts and wounds. Small amounts of iodine are also needed for good health. In the U. S. , iodine is added to table salt to prevent iodine deficiencies. Does the salt you use contain iodine?. Q: What is added to alcohol and used as an antiseptic? Choices: - chloride - arsenic - chlorine - iodine A:
iodine
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