Drag each label to the correct location on the image. Some locations require more than one label
Match each feature related to the process of seafloor spreading with its location on the diagram.
mid-ocean ridge
magma
normal polarity
youngest rock
reverse polarity
oldest rock
+ Normal polarity
- Reversed polarity

What is the speed of sound in water

Which statements about wells are true? check all that apply. a) wells bring groundwater from the unsaturated zone to the surface of the water. b) wells need to be drilled below the water table. c) if water is pumped from a well too quicky, the well may run dry. d) water from wells is generally not safe to drink. e) water gushes from artesian wells due to pressure.

Explain why the rate of urbanisation is in the way it is between developed and undeveloped countries.