Problem: Heat supplies the energy that causes motion. The deeper you go into toward the Earths core, the hotter it gets. At the core it is really hot. All that heat tries to rise toward the surface. In the Mantle, the rock is partially melted and is able to move. As it is heated, the material in the mantle moves toward the surface. As the mantle material rises, it cools. When it reaches the Earths crust, it is mostly stopped. A little of the material can break through the surface, but not all. Instead, it begins to move horizontally. The mantle material moves horizontally away from a mid-ocean ridge crest. Toward the surface, the mantle material starts to cool. As it cools it sinks back down into the mantle. These areas are where deep sea trench occur. The material sinks back down to the core. The system operates like a giant conveyor belt. The motion due to heating and cooling is called convection.

Question: "Why does the material move horizontally?"

Answer: "Because it cannot break through the surface"

OPTIONS:
- no
- yes
Answer: yes

Problem: Is this an insect or an animal? A snail is an animal just like you and me. Thats right, you too are an animal. No, you don't look like a snail. You do have some things in common. Animals can be divided into many groups. These groups are decided based on their characteristics. All animals have some basic features in common. That does not mean they are the same. They also have many differences. For example, snails are mollusks and not insects. Mollusks have a unique set of features. Notice the large foot that allows it to move. Yes, it only has one foot. Did you notice the long antennas on its head? This is where the snail's eyes are. They are on the end of the antenna. They are not on its head like most animals. The foot and eyes are unique features. Scientists use these features to place animals into groups.

Question: "What common feature do mollusks and snails have?"

Answer: "The large foot that allows it to move"

OPTIONS:
- no
- yes
Answer: yes

Problem: In 1990, the U.S. Custom House in New York City was renamed after Hamilton. In 1880, his son John Church Hamilton commissioned Carl Conrads to sculpt a granite statue, now located in Central Park, New York City. One statue honoring Alexander Hamilton in Chicago was mired in controversy, at least concerning the surrounding architecture. Kate Sturges Buckingham (1858-1937), of the Buckingham Fountain family, commissioned the monument. Its impetus was that Treasury Secretary Hamilton "secured the nation's financial future and made it possible for her own family to make its fortune in grain elevators and banking. Consequently, John Angel was hired to model a figurative sculpture and the Finnish architect Eliel Saarinen was to create a "colossal architectural setting" for it. The proposed 80-foot tall columned shelter was poorly received. By Ms. Buckingham's death in 1937, the sculpture's setting. location and design were uncertain. Conspiracy allegations surfaced, and the matter became mired in litigation. After the courts ordered the construction to be completed by 1953, the trustees hired architect Samuel A. Marx. The structure was completed, had structural problems, and was eventually demolished in 1993. The statue was gilded, and is still on display. A statue, by James Earle Fraser, was dedicated on May 17, 1923, on the south terrace of the Treasury Building, in Washington.

Question: "After being demolished the statue was:"

Answer: "The statue was gilded"

OPTIONS:
- no
- yes
Answer:
yes