• patrol, drive off intruders
• carry to good feeding spots
• build small shelters
• store treehopper eggs in own nests
Wasps & Caterpillars: parasitic wasp grubs inside caterpillar host
Brood Parasites: cowbirds lay their eggs in their nests 40. What is the Geologic Time Scale? It is what the geologists developed as a model of the history life of Earth. Eons are the largest subdivision of geologic time. Eons are broken down into smaller units called Era. Today we are living in the Phanerozoic Eon and the Cenozoic Era. 41. When was the Hadean Eon? What characterized it? 4.56-3.8 Ga. Earth was bombarded by meteorites which prevented life from evolving. 42. What were early Earth conditions like? How do scientists know this? Earth was bombarded by meteorites. From the meteorites and because the moon is part from the earth and the moon has big holes that the earth now does not have it, and only has some remaining meteorites. 43. How was the moon formed? Mars-sized body collides with the earth. (it was a part from the earth and exploded) 44. What is the oldest known material on Earth? How old is