ISBN-13: 9781433336157 / Angielski / Miękka / 2011 / 24 str.
ISBN-13: 9781433336157 / Angielski / Miękka / 2011 / 24 str.
Volcanoes can be dormant for many years. But when the pressure builds, watch out! Eruptions can be a powerful blast or a slow ooze. Explore how volcanoes are formed and what causes an eruption.