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What would happen to the ecosystems if there were no Nitrogen-fixing bacteria?
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When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?
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Describe at least two advantages and two disadvantages of using hydropower as a source of energy.
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Which radioisotope is used to date fossils? a. oxygen-16 b. carbon-14 c. uranium-238 d. carbon-12
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What type of energy conversion occurs when you place your feet near the fire place and they become warm
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What would happen to the ecosystems if there were no Nitrogen-fixing bacteria?...
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