Seismic mapping of North America has revealed that an ancient slab of crust buried beneath the Midwest is causing the crust ...

The seven continents are Africa, Antarctica, Asia, Europe, North America, Oceania and South America — but some experts argue that there could be less. "There is a question as to what exactly ...

Give pupils an outline map of the ... piece of land to North America. Practice globe tossing games with blow-up globes and ask pupils to identify continents and point to South America when they ...