The students came to the conclusion that heart rates raise by 10 to 20 beats per minute after walking and 20 to 40 beats per minute after running. first, identify the independent (manipulating) and dependent ( repsonding) variables. then, explain wheter or not the data table supports this conclusion.

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

Margaret wants to make an orange flavored drink by stirring powdered drink mix into a glass of water. she doesn't like drinks that have small clumps of powdered solid in them, so she wants the drink to be a perfect solution. what factors should margaret not consider when deciding how much powder to add to her glass of water?

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.