How is the history of colonialism in Africa related to the currently failed states of Africa?

How do impact craters reveal a surface's geological age?

A radioactive isotope of the element potassium decays to produce argon. If the ratio of argon to potassium is found to be 7:1, how many half-lives have occurred? A. 1 half-lifeB. 3 half-livesC. 7 half-livesD. 8 half-lives

What is one possible reasons jupiter and saturn radiate more energy than they receive from the sun?

Assessment started: undefined. Item 1 Which region contains Newfoundland and Nova Scotia? British Columbia Atlantic Provinces Northern Lands Prairie Provinces

What is the major source of heat for contact metamorphism? deep burial and heat from the Earth's interior heat from grinding and shearing on faults heat from the spontaneous decomposition of micas and feldspars heat from a nearby magma body

Read the article titled "Giant Jellyfish Invasion." Why are these jellyfish invading oceans near China, and how might humans have caused this problem? (Site 1)

Originally the earth probably had this type of environment a) artic b) temperate c) greenhouse

Arable land is land: a. that has been destroyed in a natural disaster b. that has experienced severe soil erosion c. that is habitable d. that will grow crops

What was the name of the river system where the Pagan Kingdom developed? Irrawaddy Mekong Saigon Ganges

The North African Maghreb states, dominated by the Atlas Mountains, do not include A. Libya. B. Morocco. C. Algeria. D. Tunisia.