1.
Which element makes up 50% of the earth's crust?
Correct Answer
B. Oxygen
Explanation
Oxygen is the correct answer because it is the most abundant element in the Earth's crust, making up approximately 50% of its composition. Oxygen combines with other elements to form minerals and rocks, such as silicates and oxides, which are the building blocks of the Earth's crust. This abundance of oxygen is due to its reactivity and ability to bond with many other elements, making it a crucial component of the Earth's geological processes.
2.
Which North American gulf is also known as the Sea of Cortez?
Correct Answer
A. The Gulf Of California
Explanation
The Gulf of California is also known as the Sea of Cortez. This gulf is located between the Baja California Peninsula and mainland Mexico. It is named after the explorer Hernán Cortés. The Gulf of California is known for its diverse marine life and is a popular destination for snorkeling, diving, and fishing.
3.
What period of time do scientists know as a nycthemeron?
Correct Answer
D. 24 Hours
Explanation
A nycthemeron is a term used by scientists to refer to a complete 24-hour cycle, which includes both day and night. It is derived from the Greek words "nyx" meaning night and "hemera" meaning day. This term is commonly used in the field of chronobiology to study biological rhythms and patterns that occur within a 24-hour period. Therefore, the correct answer is 24 Hours.
4.
What is created during an orogeny?
Correct Answer
B. Mountains
Explanation
During an orogeny, mountains are created. Orogeny refers to the process of mountain-building, typically caused by the collision of tectonic plates. This collision can cause the Earth's crust to fold, fault, and uplift, resulting in the formation of mountains. Earthquakes can occur during orogeny due to the intense pressure and movement of the Earth's crust, but they are not directly created by it. Volcanoes and tidal waves are not typically associated with orogeny.
5.
The Tennessee River is considered to be the main tributary of which river?
Correct Answer
B. The Ohio
Explanation
The Tennessee River is considered to be the main tributary of the Ohio River. Tributaries are smaller rivers or streams that flow into a larger river, and the Tennessee River is one of the largest tributaries of the Ohio River. It spans multiple states and provides a significant amount of water flow into the Ohio River system.
6.
In which desert would the highest sand dunes be found?
Correct Answer
B. Sahara
Explanation
The Sahara desert is known for having the highest sand dunes in the world. These dunes can reach heights of over 500 feet and are a result of wind and sand erosion over thousands of years. The Sahara desert is located in North Africa and covers a vast area, making it the largest hot desert in the world. Its extreme aridity and strong winds contribute to the formation and preservation of these towering sand dunes.
7.
What river runs into Victoria Falls?
Correct Answer
B. The Zambezi
Explanation
The Zambezi is the correct answer because it is the river that runs into Victoria Falls. Victoria Falls is located on the border of Zambia and Zimbabwe, and the Zambezi River flows through both countries before plunging over the falls. It is one of the largest waterfalls in the world and a popular tourist attraction. The Amazon, the Congo, and the Nile are all major rivers, but they do not flow into Victoria Falls.
8.
Which volcano is the only active spewer on the European mainland?
Correct Answer
C. Vesuvius
Explanation
Vesuvius is the correct answer because it is the only active volcano on the European mainland. Etna is also an active volcano, but it is located on the island of Sicily, which is not considered part of the mainland. Ida and Ararat are not active volcanoes and are located outside of Europe. Therefore, Vesuvius stands as the only active spewer on the European mainland.
9.
From which state does the continental divide enter Canada?
Correct Answer
D. Montana
Explanation
The continental divide enters Canada from Montana. The continental divide is a geographic feature that determines the flow of water on the North American continent. It separates the watersheds that drain into the Pacific Ocean from those that drain into the Atlantic Ocean. Montana is located along the Rocky Mountains, which is where the continental divide runs through. Therefore, it is logical to conclude that the continental divide enters Canada from Montana.
10.
From which state does the continental divide enter Mexico?
Correct Answer
B. New Mexico
Explanation
The continental divide enters Mexico from the state of New Mexico.
11.
What is the tallest mountain in Canada?
Correct Answer
B. Mount Logan
Explanation
Mount Logan is the correct answer because it is the tallest mountain in Canada. Located in the Yukon territory, it stands at an impressive height of 5,959 meters (19,551 feet). Mount Robson, Mount McKinley, and Mount Columbia are all significant mountains, but they are not as tall as Mount Logan.
12.
Which part of the United States has the greatest cluster of estuaries?
Correct Answer
B. Northeast
Explanation
The correct answer is Northeast. The Northeast region of the United States has the greatest cluster of estuaries. This is due to the region's geography and the presence of many large rivers, such as the Hudson, Delaware, and Chesapeake Bay. Estuaries are areas where freshwater from rivers mixes with saltwater from the ocean, creating a unique and highly productive ecosystem. The Northeast's abundance of rivers and coastal areas makes it an ideal location for the formation of estuaries.
13.
What is the mass of the earth in short tons?
Correct Answer
B. 6 Sextillion, 588 Quintillion Short Tons
Explanation
The mass of the earth is measured in short tons, and the correct answer is 6 Sextillion, 588 Quintillion Short Tons.
14.
Which type of lava is typically rope-like in appearance?
Correct Answer
B. Pa-Hoe-Hoe
Explanation
Pa-Hoe-Hoe is a type of lava that is typically rope-like in appearance. It forms when basaltic lava cools quickly on the surface, causing the outer layer to solidify and crack while the molten lava underneath continues to flow. This creates a twisted, rope-like texture. Aa, on the other hand, is a type of lava that is blocky and rough in appearance. Andesitic lava is more viscous and can form different types of volcanic landforms. Therefore, the correct answer is Pa-Hoe-Hoe.
15.
During which epoch did a land connection between Siberia and Alaska form?
Correct Answer
D. Miocene
Explanation
During the Miocene epoch, a land connection between Siberia and Alaska formed. This land connection, known as the Bering Land Bridge or Beringia, emerged due to lower sea levels caused by the glaciation of the polar ice caps. This land bridge allowed for the migration of various species between Asia and North America, including early humans. The formation of this land connection during the Miocene epoch had significant implications for the dispersal and evolution of plants and animals in both regions.