Earthworm Data Plot Number of Earthworms
A 1,145
B 978
C 125
D 1,008
E 959

Juan and Melissa were counting earthworms for a science experiment. They had predicted that they would find more earthworms in plots that shady and lots of damp soil. They marked out 3 meters by 3 meters plots. The shadiest plots were A and D.

What is another possible explanation of the student's data?
A) The plots were not all the same size.
B) The plots were shady but did not have damp soil.
C) Juan and Melissa did not count the worms accurately.
D) The earthworms moved when the students started counting.

What is the formula for the compound dinitrogen pentoxide? a. n4o5 b. n5o4 c. n4o6 d. n5o2 e. n2o5

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.

How does a large body of water, such as the ocean, influence climate?