3.01 in science can someone pls answer these questions its the one were ' you have to be the teacher and make this assignment':
8. how would you compare whether land or water heats faster?
9. within a 24-hour period, at what three points should the temperature be taken? why?
10. what would an effective conclusion need to include?

40 points pls

What happens to energy in an open system?

What is the chemical name of the compound ti2o3? use the list of polyatomic ions and the periodic table to you answer.

Dumbledore decides to gives a surprise demonstration. he starts with a hydrate of na2co3 which has a mass of 4.31 g before heating. after he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. he asks everyone in class to determine the integer x in the hydrate: na2co3·xh2o; you should do this also. round your answer to the nearest integ