John wants to know how different colors of light affect the growth of plants. He believes that plants will survive best when grown in white light. John plants sunflower seeds in five different pots. He places one pot in white light, one in blue light, one in green light, one in red light, and one outside in natural light. All of the seeds are planted in the same type of soil and are each given 20mL of water once a day for two weeks. After two weeks, John measures the height of the plants in each pot Question A. What is the Independent Variable in this experiment?

Question B. What is the Dependent Variable?

Question C. What variables are being controlled and kept constant?

7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation. 8. when a 2.5 mol of sugar (c12h22o11) are added to a certain amount of water the boiling point is raised by 1 celsius degree. if 2.5 mol of aluminum nitrate is added to the same amount of water, by how much will the boiling point be changed? show all calculations leading to your answer or use 3 – 4 sentences to explain your answer. 9. if 5.40 kcal of heat is added to 1.00 kg of water at 100⁰c, how much steam at 100⁰c is produced? show all calculations leading to an answer. 10. the freezing of water at 0⁰c can be represented as follows: h2o (l) ↔ h2o(s) the density of liquid water is 1.00 g/cm3. the density of ice is 0.92 g/cm3. in 3 – 4 sentences explain why applying pressure causes ice to melt.