Which is a nonpoint source of pollution? A)Tourists throw the trash into the ocean.
B)A car mechanic pours oil on the ground.
C)Rain contains chemicals that seep into the ground.
D)A pipe dumps waste from a factory into a stream.

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.