Which of the following would be considered a solution? salt in the sugar bowl sugar added to water oil added to water any fat–soluble substance mixed with any water–soluble substance

An observation that requires measurement is called quantitative observable or qualitative

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?