Physics, 28.07.2019 14:00, byejpg

Joe wanted to experiment with different factors that affect the freezing rate of water. he put two cups of water into each of two identical glass bowls. next, he stirred sugar into the water in one of the bowls, and he put both bowls in the freezer. he checked their temperatures after one hour, and measured how much water was still liquid in each bowl. what was the variable that changed in this experiment? a. the amount of time each bowl was left in the freezer b. the amount of sugar mixed into each bowl c. the size and shape of each bowl d. the amount of water each bowl contained

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Chemistry, 28.06.2019 15:30, tatirocks1870

Agroup of students is investigating how the addition of salt impacts the floatation of an egg in water. four identical cups were taken for the experiment. the data of the experiment are shown below: experimental record cup amount of water (ml) amount of salt (g) level of egg above water 1 450 0 sinks to bottom 2 450 68 2 cm 3 450 136 3 cm 4 450 272 4 cm what was the dependent variable in this experiment? density of water in the cup level of egg above water amount of water in the cup amount of salt added

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Physics, 27.07.2019 23:00, mlguerrero12

Vicky wanted to investigate water evaporation. she placed 50 ml of distilled water in three identical glass jars. she left one jar in the sunlight, one jar in the dark, and one jar in a shady area. after four hours, she measured how much water was still in each jar. which of the following variables was held constant in the experiment?

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Social Studies, 18.08.2019 18:50, ligittiger12806

Earth science – unit 6: earth's water experiment: water purification imagine being stranded in the desert without any clean water. how would you survive without becoming dehydrated? as long as you have a piece of plastic, some rocks, and a cup, you can purify dirty water using the water cycle. the purification process uses the "greenhouse effect" to cause evaporation and condensation. the setup used to purify the water is called a solar still. in this experiment, you will purify water using a solar still. objectives explain how evaporation and condensation can be used to purify water. materials 1 cup of dirt 4 cups of water small glass large glass bowl clear plastic wrap small, round rock sunshine directions pour the water into the bowl. mix in the dirt. place the small glass in the center of the bowl. the lip of the glass should stand taller than the dirt and water mixture, but shorter than the sides of the bowl. find a sunny spot outside. place the bowl in direct sunlight. place the plastic wrap over the bowl. put the rock in the center of the plastic wrap, directly over the cup. gently push down on the rock until the sides of the plastic wrap slope at about a 45° angle. secure the loose sides of the plastic wrap to the outside of the bowl. leave the bowl in the sun for three or four hours. remove the plastic wrap. look in the cup and in the bowl. record your observations. respond to the questions below. questions answer the questions in the essay box below. is the water in the cup dirty? why or why not? what happened to the water in the bowl? this project simulates a real world process. what does the plastic wrap represent? what does the water in the cup represent? which two parts of the water cycle are at work?

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Biology, 27.09.2019 02:00, Emptypockets451

Pour the water into the bowl. mix in the dirt. experiment: water purification place the small glass in the center of the bowl. the lip of the glass should stand taller than the dirt and water mixture, but shorter than the sides of the bowl. find a sunny spot outside. place the bowl in direct sunlight. place the plastic wrap over the bowl. put the rock in the center of the plastic wrap, directly over the cup. gently push down on the rock until the sides of the plastic wrap slope at about a 45° angle. secure the loose sides of the plastic wrap to the outside of the bowl. leave the bowl in the sun for three or four hours. remove the plastic wrap. look in the cup and in the bowl. record your observations. respond to the questions below. questions answer the questions in the essay box below. is the water in the cup dirty? why or why not? what happened to the water in the bowl? this project simulates a real world process. what does the plastic wrap represent? what does the water in the cup represent? which two parts of the water cycle are at work?

Answers: 3

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