(Question)
Q: Earth's temperature will increase further as more of what colorfully nicknamed gases are put into the atmosphere? Choices: - bluehouse gases - blue dioxide gases - green dioxide gases - greenhouse gases A:
(Answer)
greenhouse gases

(Question)
Q: Deep ocean currents are caused by differences in what property at the top and bottom? Choices: - diameter - mass - velocity - density A:
(Answer)
density

(Question)
Q: What do animals observe in others to help solve problems? Choices: - communication - function - patterns - behavior A:
(Answer)
behavior