A landscaper is shopping for landscaping materials. She wants to use materials through which water flows easily. Which two materials should she choose?

pls answer 10 points its not alot but still

What is the independent variable in this investigation? mass volume sample number substance density

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive

Which scientists contributed to the determination of how cfcs in clouds in the upper atmosphere could destroy ozone molecules