A river and all of its tributaries make up a?

Which are characteristics of more-economically developed nations?

A new energy source found in the ocean that is currently very costly to obtain? A. Methane hydrates B. Petroleum C. Plankton

What are two Australian geographical features that hindered early exploration? Western Plateau Gulf of Carpentaria Great Barrier Reef Great Dividing Range

For a population's growth rate to be zero A. no births can occur B. the average number of births and deaths must be the same C. more deaths than births must occur D. more births than deaths must occur

What were some of the causes of the Amu Darya and Syr Darya rivers being ruined? Select all that apply.

Which resources are important to the economies of many countries in Siberian Russia, Central Asia, and the Caucasus region? A. oil B. timber C. diamonds D. coal

In a short paragraph, explain the various waves of immigration to the United States. What groups were part of each of these waves?

What is a fault? A. the name for two opposing forces B. a type of crust that moves under heavier crust C. a crack in Earth's crust where movement occurs D. a volcanic region where new material is being created

How many plug-in hybrids does Obama want to see on the road in the next 6 years? 100,000 500,000 1 million 2 million

What is the difference between weathering and erosion?