Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.
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Question: Context: Energy, or the ability to do work, can exist in many different forms. The photo in Figure 17.8 represents six of the eight different forms of energy that are described in this lesson. The guitarist gets the energy he needs to perform from chemical energy in food. He uses mechanical energy to pluck the strings of the guitar. The stage lights use electrical energy and give off both light energy and thermal energy, commonly called heat. The guitar also uses electrical energy, and it produces sound energy when the guitarist plucks the strings. For an introduction to all these forms of energy, go to this URL: . For an interactive animation about the different forms of energy, visit this URL: After you read below about different forms of energy, you can check your knowledge by doing the drag and drop quiz at this URL: . Mechanical energy is the energy of an object that is moving or has the potential to move. It is the sum of an objects kinetic and potential energy. In Figure 17.9, the basketball has mechanical energy because it is moving. The arrow in the same figure has mechanical energy because it has the potential to move due to the elasticity of the bow. What are some other examples of mechanical energy? Energy is stored in the bonds between atoms that make up compounds. This energy is called chemical energy, and it is a form of potential energy. If the bonds between atoms are broken, the energy is released and can do work. The wood in the fireplace in Figure 17.10 has chemical energy. The energy is released as thermal energy when the wood burns. People and many other living things meet their energy needs with chemical energy stored in food. When food molecules are broken down, the energy is released and may be used to do work. Electrons are negatively charged particles in atoms. Moving electrons have a form of kinetic energy called electrical energy. If youve ever experienced an electric outage, then you know how hard it is to get by without electrical energy. Most of the electrical energy we use is produced by power plants and arrives in our homes through wires. Two other sources of electrical energy are pictured in Figure 17.11. The nuclei of atoms are held together by powerful forces. This gives them a tremendous amount of stored energy, called nuclear energy. The energy can be released and used to do work. This happens in nuclear power plants when nuclei fission, or split apart. It also happens in the sun and other stars when nuclei fuse, or join together. Some of the suns energy travels to Earth, where it warms the planet and provides the energy for photosynthesis (see Figure The atoms that make up matter are in constant motion, so they have kinetic energy. All that motion gives matter thermal energy. Thermal energy is defined as the total kinetic energy of all the atoms that make up an object. It depends on how fast the atoms are moving and how many atoms the object has. Therefore, an object with more mass has greater thermal energy than an object with less mass, even if their individual atoms are moving at the same speed. You can see an example of this in Figure 17.13. Energy that the sun and other stars release into space is called electromagnetic energy. This form of energy travels through space as electrical and magnetic waves. Electromagnetic energy is commonly called light. It includes visible light, as well as radio waves, microwaves, and X rays (Figure 17.14). The drummer in Figure 17.15 is hitting the drumheads with drumsticks. This causes the drumheads to vibrate. The vibrations pass to surrounding air particles and then from one air particle to another in a wave of energy called sound energy. We hear sound when the sound waves reach our ears. Sound energy can travel through air, water, and other substances, but not through empty space. Thats because the energy needs particles of matter to pass it on. Energy often changes from one form to another. For example, the mechanical energy of a moving drumstick changes to sound energy when it strikes the drumhead and causes it to vibrate. Any 
 Question: total kinetic energy of all the atoms in an object

Answer: thermal energy


Question: Context: Did you ever make a secret code? One way to make a code is to represent each letter of the alphabet by a different number. Then you can send a coded message by writing words as strings of digits. This is similar to how information is encoded using an electric current. The voltage of the current is changed rapidly and repeatedly to encode a message, called an electronic signal. There are two different types of electronic signals: analog signals and digital signals. Both are illustrated in Figure 23.20. A digital signal consists of pulses of voltage, created by repeatedly switching the current off and on. This type of signal encodes information as a string of 0s (current off) and 1s (current on). This is called a binary ("two-digit") code. DVDs, for example, encode sounds and pictures as digital signals. An analog signal consists of continuously changing voltage in a circuit. For example, microphones encode sounds as analog signals. Electronic components are the parts used in electronic devices such as computers. The components transmit and change electric current. They are made of materials called semiconductors. A semiconductor is a solid crystalusually consisting mainly of siliconthat can conduct current better than an electric insulator but not as well as an electric conductor. Very small amounts of other elements, such as boron or phosphorus, are added to the silicon so it can conduct current. A semiconductor is illustrated in Figure 23.21. There are two different types of semiconductors: n-type and p-type. An n-type semiconductor consists of silicon and an element such as phosphorus that gives the silicon crystal extra electrons. An n-type semiconductor is like the negative terminal in a chemical cell. A p-type semiconductor consists of silicon and an element such as boron that gives the silicon positively charged holes where electrons are missing. A p-type semiconductor is like the positive terminal in a chemical cell. Electronic components contain many semiconductors. Types of components include diodes, transistors, and inte- grated circuits. Each type is described in Table 23.2. Electronic Component Diode Transistor Integrated Circuit (Microchip) Description A diode consists of a p-type and an n-type semicon- ductor placed side by side. When a diode is connected by leads to a source of voltage, electrons flow from the n-type to the p-type semiconductor. This is the only direction that electrons can flow in a diode. This makes a diode useful for changing alternating current to direct current. A transistor consists of three semiconductors, either p- n-p or n-p-n. Current cant flow through a transistor unless a small amount of current is applied to the center semiconductor (through the base). Then a much larger current can flow through the transistor from end to end (from collector to emitter). This means that a transmitter can be used as a switch, with pulses of a small current turning a larger current on and off. A transistor can also be used to increase the amount of current flowing through a circuit. You can learn more about transistors and how they work at this URL: http An integrated circuitalso called a microchipis a tiny, flat piece of silicon that consists of layers of elec- tronic components such as transistors. An integrated circuit as small as a fingernail can contain millions of electronic components. Current flows extremely rapidly in an integrated circuit because it doesnt have far to travel. You can learn how microprocessors are made at this URL: Many of the devices you commonly use are electronic. Electronic devices include computers, mobile phones, TV remotes, DVD and CD players, game systems, MP3 players, and digital cameras. All of these devices use electric current to encode, analyze, or transmit information. Consider the computer as an example of an electronic device. A computer contains microchips with millions of tiny electronic components. Information is encoded as 0s and 1s and transmitted as electrical pulses. One digit (either 0 or 1) is called a bit, which stands for "binary digit." Each group of eight digits is called a byte. A gigabyte is a billion bytes that 
 Question: The type of electronic component that can be used to increase the amount of current flowing through a circuit is a

Answer: transistor.


Question: Context: The film opens in the middle of the night as the Sherwood robbers run through the forest. The robbers run through Nottingham and put their horses into a stable. Lady Marion (Cate Blanchett), wife of Sir Robert Loxley, rouses her servants and demands that they open the gates. Taking an arrow and setting it aflame, she shoots it at the feet of one of the robbers and tells them that she can see them. After they leave, she realizes that the seeds and grain of Nottingham were stolen and that they won't have anything to plant come spring.Robin Longstride (Russell Crowe) leads his men through the forest back to their own camp. When he fought in the Crusades, Robin was only an archer. As English troops lead an assault on a French stronghold, Robin and his men fight valiantly alongside King Richard the Lionheart (Danny Huston). A young archer attempts to plant a bomb bag on the portcullis but gets stuck. Robin races to him and rescues him before the French can kill him. Robin then retreats to safety before igniting the gate. The English troops attack the breach.Back in England, Richard's younger brother, Prince John (Oscar Isaac), is cheating on his wife Isabel (Jessica Raine) with Isabella (Lea Seydoux), the niece of the French king. John's mother Eleanor of Aquitaine (Eileen Atkins) walks in, passing his wife, who is standing sadly outside the room. John asks his mother to leave but she tells him that his behavior has given the king of France the excuse he needs to invade. She tells him to go to his wife, but he responds that his wife is barren. John expresses his desire to divorce his wife and marry the French girl since he anticipates becoming king upon Richard's death.Robin sets up a memory game where he hides a pea under three cups. Most people fall for it, but Little John (Kevin Durand) is determined to beat the game. When Robin offers three choices, Little John accuses him of hiding the pea in his hand while turning all of the cups. However, removing all three cups reveals that the pea was in the center cup all the time. Little John attacks Robin and they fight it out until they're interrupted by the king's arrival. When the king asks who started the fight, Robin says that it was his fault. The king talks to Robin and asks if he is honest enough to tell him his thoughts on the Crusade. The king wonders whether God would be pleased; Robin says no. The slaughter of the Muslims in their last battle made Robin feel that God did not approve of their actions and that they had acted like barbarians. Robin and his men are put in the stocks and Robin swears that he is done fighting and will return home once released.In nearby woods, Sir Godfrey (Mark Strong) visits King Philip (Jonathan Zaccai) of France. Philip notes that Sir Godfrey is of French and English heritage and asks where his allegiance lies. Godfrey pledges his allegiance to King Philip and Philip requests that Godfrey kill King Richard the Lionheart so that Philip may attack England under the leadership of the inept John. Sir Godfrey agrees.Meanwhile, King Richard leads his men in battle with the French. Upon breaching the perimeter, an archer shoots King Richard through the neck. As he dies, his men call for a doctor but can only comfort his passing with wine. His knights gather the crown and prepare to depart for the boats back to England. The young man Robin saved sees the incident and runs back to the stocks to free Robin and his friends. They grab their equipment and flee the camp as quickly as possible.Sir Robert Loxley (Douglas Hodge) is leading the knights of King Richard through the forest when Sir Godfrey's men attack and kill most of the knights. Loxley is skewered by a spear and left to die slowly. Godfrey asks about King Richard and is surprised to hear that the king was killed in battle. Loxley tells them that the king's crown is in a bag on the king's horse. Godfrey's men attempt to 
 Question: What is the name of the brown bear in the movie?

Answer:
little john