Which of the following has a natural ph that is acidic?
rain
fresh water lakes
sea water
tap water

If this plastic cup is heated to its melting point, what will eventually happen to all the particles in the plastic? a. the particles will begin to move enough that they slide past each other. b. bonds will form and the liquid will become a solid. c. the spaces between the particles will get smaller. d. the particles will change state and become a crystalline solid.

Natural forces that can alter ecosystems include seasons and climate changes. t or f

What are the applications of electromagnetic waves