On what river does Russia's capital lie?

My textbook states that it lies upon the Moscow River, but I am still uncertain.

It's right. It's also called the Moskva River because that's the way it's pronounced in Russian.

http://en.wikipedia.org/wiki/Moskva_River

To determine the river on which Russia's capital, Moscow, lies, we can cross-reference information from various sources. While your textbook states that Moscow is located on the Moscow River, we can verify this using other reputable sources to confirm the accuracy of the information.

One reliable source we can consult is maps. Digital or physical maps are a great way to visually identify the location of cities in relation to rivers and other geographical features. Using an online map service or a map found in an atlas or reference book, search for Moscow and observe the river that runs through or near the city.

Another reliable source is official government websites or websites of Moscow city authorities. These websites often provide detailed information about the geography and history of the city, including its position in relation to rivers. By visiting such websites, you can locate information that confirms the name of the river on which the capital is situated.

Lastly, you can also reference other reputable books, encyclopedias, or articles that focus on Russian geography or the city of Moscow itself. These sources can provide additional confirmation of the river on which Moscow is located.

By cross-referencing information from different sources and using reliable references such as maps, official websites, and reputable books, you can confidently confirm whether Moscow indeed lies on the Moscow River.