A 12. 0 g sample of a metal is heated to 90. 0 ◦c. It is then dropped into 25. 0 g of water. The temperature of the water rises from 22. 5 to 25. 0 ◦c. The specific heat of water is 4. 18 jg−1◦c−1. Calculated the specific heat of the metal. Express your answer in jg−1◦c−1.

Summarize the work of famous environmental scientists of the past.

Which scenario describes intraspecific, indirect competition? a. a peacock defends its territory against another peacock. b. lions and hyenas compete for the same prey animals. c. a male black bear eats fish in an area of a lake, so other black bears can’t. d. different species of birds fight over spilled popcorn on the ground.

What kind of interaction is depicted in the image? a. intraspecific, direct b. intraspecific, indirect c. interspecific, direct d. interspecific, indirect e. invasion