Answer the following question given this paragraph: When the wind deposits sand, it forms small hills. These hills are called sand dunes ( Figure below ). For sand dunes to form, there must be plenty of sand and wind. Sand dunes are found mainly in deserts and on beaches. Q: When the wind deposits sand, it forms small hills, what are these hills called? Choices: - sand tunnels - snow banks - mud puddles - sand dunes A:
sand dunes
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Answer the following question given this paragraph: When we consider a chemical reaction, we need to take into account both the system and the surroundings. The system includes the components involved in the chemical reaction itself. These will often take place in a flask, a beaker, a test tube, or some other container. The surroundings include everything that is not part of the system. When potassium reacts with water, part of the heat energy generated in the reaction is released into the surroundings. The boundary between system and surroundings is arbitrary, and it is generally chosen in a way that makes observations and calculations easier. Q: When we consider a chemical reaction, we need to take into account both the system and what? Choices: - date - fluctuations - time - sorroundings A:
sorroundings
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Answer the following question given this paragraph: A: A can of warm soda will fizz more because increasing the temperature decreases the solubility of a gas. Therefore, less carbon dioxide can remain dissolved in warm soda than in cold soda. Q: A can of warm soda will fizz more because increasing the temperature decreases the what of a gas? Choices: - Acidity - humidity - viscosity - solubility A:
solubility
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Answer the following question given this paragraph: Q: What two types of communication do both humans and birds use primarily? Choices: - sensual and auditory - material and auditory - interaction and auditory - visual and auditory A:
visual and auditory
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