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Questions in geography

[Done] Which of the following words best describes Africa? A. country B. continent C. desert D. river

[Done] What's the main difference between a marsh and a swamp?

[Done] How wide is the portion of Antarctica that belongs to Chile? A. half a thousand square miles B. two million square miles C. one million square miles D. half a million square miles

[Done] If your GPS gives you directions so the rider can hear them, it can be annoying. What should you do instead? A. You should have your rider read out the directions for you. B. You shouldn't use GPS, and only drive in neighborhoods you know. C. You should use a Bluetooth earbud so you can hear the GPS but your rider does not. D. You shouldn't worry about annoying your rider.

[Done] Which Indian state's state bird is the Great Indian Bustard?

[Done] Explain how layers that form in ice are similar to tree rings.

[Done] Select the best answer for the question. Which process causes minerals to become concentrated in certain areas? A. Volcanic activity B. Siltation C. Tectonic movement D. Desalination

[Done] What's the point at which a stream forms and begins to flow called? A. Base B. Estuary C. Gradient D. Headwater

[Done] The composition of rocks affects their densities and the densities of Earth's layers. Use what you have learned and the information in the table to answer the question. | Rock/Mineral | Density ($gm / cm ^3$) | | :------------ | :---------------------- | | Eclogite | 3.45 | | Perovskite | 4.03 | | Rhyolite | 2.50 | | Stishovite | 4.29 | In which order would these rocks and minerals be found in the layers of Earth from the crust to the lower mantle? A. eclogite, perovskite, rhyolite, stishovite B. stishovite, rhyolite, perovskite, eclogite C. stishovite, perovskite, eclogite, rhyolite D. rhyolite, eclogite, perovskite, stishovite

[Done] Answer the questions based on the information given. The Amur plate, a small plate, has moved away from the Eurasian plate. It has moved 125,000 meters in 25 million years. It is moving eastward. 1. What is the rate of motion of the Amur plate? Express your answer in mm/year. 2. Where would the plate be after 1 million years? Express your answer in m. 3. What geologic feature will form between the Amur and Eurasian plates?