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Louisa placed a bowl of water and a bowl of sand in the sun. She inserted a thermometer into each bowl and recorded the initial temperature as well as the temperature after 30 minutes. After the 30-minute period, the sand had heated up more than the water. Louisa's experiment demonstrated that A) sunlight does pass through water, B) sunlight heats liquids more than solids, C) different materials heat up at different rates, and D) different materials absorb varying amounts of heat.
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The water vascular system in echinoderms is a unique and defining characteristic that acts as a vital part of whole animal’s body. It consists of hundreds to thousands of tube feet that are found in the ambulacral grooves. Due to this, this system is also called ambulacral system. The water vascular system controls the tube feet hydraulically through a complex of fluid-filled canals and reservoirs. In response, tube feet perform various functions. Echinoderms also possess special structures for respiration.
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Question Text | Louisa placed a bowl of water and a bowl of sand in the sun. She inserted a thermometer into each bowl and recorded the initial temperature as well as the temperature after 30 minutes. After the 30-minute period, the sand had heated up more than the water. Louisa's experiment demonstrated that A) sunlight does pass through water, B) sunlight heats liquids more than solids, C) different materials heat up at different rates, and D) different materials absorb varying amounts of heat.
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Topic | All topics |
Subject | Biology |
Class | Class 11 |