*Question*
Q: Volcanoes can be active, dormant, or what else? Choices: - remnant - still - burgeoning - extinct A:
**Answer**
extinct

*Question*
Q: What is the force of gravity called? Choices: - scale - mass - pressure - weight A:
**Answer**
weight

*Question*
Q: What is the layer of tissue between the body and shell called? Choices: - collagen - cuticle - epidermis - mantle A:
**Answer**
mantle

*Question*
Q: Mollusks such as squid and octopi, which must hunt to survive, possess what complex organs containing millions of neurons? Choices: - gills - hearts - tentacles - brains A:
**Answer**
brains