Answer:
Magnetic reversals - Evidence suggests that the earth's magnetic field has periodically reversed its polarity in the past. ... Small magnetite crystals in a cooling lava flow act like tiny compass needles, preserving a record of the earth's magnetic field when the lava solidifies.
23 countries in North America have a border with South America.
Explanation:
- It has an overland border with the continent of South America which runs along the Panama-Colombia state boundary. In total there are 23officially recognized sovereign states in North America.
- At some point, the boundary between North America and South America falls on Panama's Isthmus.
- The most famous demarcation in atlases and other documents parallels the dividing watershed of the Darién Mountains along the Colombia-Panama border where the isthmus meets the continent of South America.
A Both have polution problems and B both have effective mass transit systems also D both are culturally important to their respective countries.
Check A,B,D
London is closer to New York city in latitude