Chemistry

Chemistry, 09.07.2019 22:30, saurav76

Student mixes 5 g of sand into a beaker of 20 g of water. is this a physical or chemical change-why?

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Chemistry, 09.07.2019 22:30, teescub9738

Student mixes 5 g of sand into a beaker of 20 g of water. is this a physical or chemical change-why?

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Geography, 23.07.2019 06:00, fainet

One student did an experiment with sand, gravel, and water. the steps of the experiment are shown below: -put layers of sand and gravel in a beaker. -pour water slowly into the beaker. -observe the water fill the spaces between the particles of sand and gravel. -continue to pour water into the beaker until the water rises above the layer of sand and gravel. what does the student's experiment most likely demonstrate? a. the movement of recharge through the layers under the earth b. the movement of groundwater in a well filled with sand and gravel c. the formation of geysers when water rises from the earth's surface d. the formation of sinkholes when water seeps through sand and gravel

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Geography, 25.07.2019 10:00, majailaharris200

One student did an experiment with sand, gravel and water. the steps of the experiment are shown below. put layers of sand and gravel in a beaker. pour water slowly into the beaker. observe the water fill the spaces between the particles of sand and gravel. continue to pour water into the beaker until the water rises above the layer of sand and gravel. what does the student's experiment most likely demonstrate?

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Chemistry, 22.10.2019 06:00, ashantajohnson6810

Ben and sam were conducting experiments on physical and chemical changes in science class. first they added some salt to water and stirred it up until the salt dissolved. "that's a physical change" ben said. "and that's a solution which is a mixture", added sam. next they added an anti-acid tablet to some water. the water began to fizz and bubble. the beaker got cooler. "that's a physical change too," ben noted. "no, it's not," responded sam. who is correct and where should the contents of the beaker be placed in the venn diagram?

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Student mixes 5 g of sand into a beaker of 20 g of water. is this a physical or chemical change-why?...

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