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| Pregunta | Respuesta |
| What are fossils? | Fossils are the remains of organism from many years ago that are found in rocks. |
| What can we learn from fossils? | Fossils gives us information about that lived millions of years ago. |
| What is extinction? | It is a permanent loss of all the members of a species. |
| How do living organisms cause extinctions? | Extinction may be cause by new predators, new diseases or new, more successful competitors. |
| What caused the mass extinctions of the past? | Mass extinction may be caused by single catastrophic events such as volcanoes or asteroid strikes. |
| How do new species arise? | New species arise when two populations become isolated. |
| How do population become isolated? | Population become isolated when they are separated geographically, e.g on islands. |
| How does speciation take place in an isolated population? | Speciation takes place when an isolated population becomes so different from the original population that successful interbreeding can no long take place. |
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