40. biome—a large region in the same
climate and geographical area
41. biotic—living or once living part of
an ecosystem
42. conduct—to carry out an experiment
43. construct—to build something or create
44. ecosystem—an area in which living and
nonliving things interact
45. environment—all living and nonliving
surroundings that affect an organism
46. equipment—the things needed or used
for a particular purpose
47. explanation—a reason why something
happened
48. field investigation—a scientific
investigation done outdoors
49. journal—a daily record of events or
occurrences
50. natural—not made by people, made by
nature
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