Q: What type of aquifer is trapped between two impermeable rock layers? Choices: - abandoned - solid - segmented - confined A:
confined
------
Q: Explosive eruptions associated with what can be tens of thousands of times as powerful as an atomic bomb? Choices: - forest fires - hurricanes - earthquakes - volcanoes A:
volcanoes
------
Q: Which chemical element is the basis of all life on earth? Choices: - oxygen - nitrogen - hydrogen - carbon A:
carbon
------
Q: What do you call different organs working together? Choices: - cellular system - endocrine system - maturation systems - organ systems A:
organ systems
------