1. Volcanoes

2. A constructive plate boundary

3. Iceland
Eyjafjallajökull © Flickr; Bjarki Sigursveinsson

4. A destructive plate boundary

5. Villarrica, Chile
Mount Villarrica © Flickr; Gerben van Heijningen

6. Mauna Loa and Kilauea Mauna Loa © Flickr; Aubrey Saunders
Kilauea Volcano © Flickr; Greg Bishop

7. Mount Etna
Etna 12 may 2011 © Flickr; Helena Eriksson

8. The structure of a composite volcano

9. Edinburgh Castle
Edinburgh castle © Flickr, greg.road.trip

10. The Giant’s Causeway Giant causeway © Flickr; facildeuntar
Giants Causeway © Flickr; Amanda Slater