The nucleus of halley's comet is approximately a.16km by 8km b.1 meter wide c. 1km wide d.100km by 80km

The earth is composed of three different chemical layers: core, mantle and crust. the formation of these layers was from a process called

Religious beliefs of indigenous peoples of oceania connected them to

Explain the reason for having an equator and a prime meridian. how do these two lines us to navigate our world? describe your opinion in at least two to three sentences.