Ineed with these: 1. what determines the viscosity of lava? silica and feldspar content silica and gas content. gas content and feldspar content 2. what effect do feo and mgo content have on the viscosity of lava flows they tend to break the chains of silica polymerization they tend to make the magma more viscous they tend to cause more violent eruptions 3. the slow, darwinian evolution through time is termed punctuated equilibrium phyletic gradualism evolutionary tree

Describe the german immigrants in texas. why did they emigrate from germany to texas? what are some examples of their culture in texas?

Match your vocabulary word to its definition. 1. emigration 2. immigration 3. migration 4. overpopulation 5. sustainable development 6. under population 7. unsustainable development 8. urbanization the movement from one place to another the number of people exceeds the available natural resources in an area leaving one's homeland to settle in a new place the increase in the population of a city the movement of people to a new country the ability to meet current needs without reducing the ability to meet future needs resources being used up at a faster rate than they can be replenished birth rate insufficient to replace the existing population

Fossils of glossopteris, an extinct fern, were discovered on which continents to support the theory of continental drift? check all that apply.