You know that friction also causes heat. Think about when you rub your hands together. It is friction that makes them warm. But why does this happen? Friction causes the molecules on rubbing surfaces to move faster. Faster moving particles have more heat energy. Heat from friction can be useful. Can you think of other places where you might find friction? Friction also lets you light a match. Heat from friction can also cause problems. It can cause a car to overheat. To reduce friction, oil is added to the engine. Oil coats the surfaces of moving parts. This coating of oil makes them slippery. When things are slippery there is less friction. Have you ever seen a sign that says, slippery when wet? This too has to do with friction. Water, like oil, can reduce friction. The wet surface may allow your shoes to slide more easily.

Question: "Why do rubbing your hands make them warm?"

OPTIONS:
- no
- yes

Answer: "Mass"

Response: no

Jack and Mackenzie wanted to do something fun during their day off from school. They knew that the library had story time on Monday, Tuesday, and Wednesday. Their mother told them they could go to the library every Tuesday for their story time. They packed up the car and drove to the library, ready for a fun morning. When they arrived to the story room, there were lots of other children their age, all sitting cross-legged and ready for the story of the day. The teacher told them they would be reading "The Wild Horse". She began to tell the story of Majestic, the wild horse who could not be calmed. His people had tried and tried to break him, but he was wild at heart. Every time they took him to the river to drink, he would run straight into the water and get soaking wet! He would splash and play until he was ready to go back home, where he would sleep for hours, having worn himself out playing.

Question: "When Jack and Mackenzie arrived at the library, who did they see?"

OPTIONS:
- no
- yes

Answer: "Their mother"

Response: no

Literary career During the war Camus joined the French Resistance cell Combat, which published an underground newspaper of the same name. This group worked against the Nazis, and in it Camus assumed the nom de guerre Beauchard. Camus became the paper's editor in 1943. He first met Sartre at the dress rehearsal of Sartre's play, The Flies, in June 1943. When the Ailies liberated Paris in August 1944, Camus witnessed and reported the last of the fighting. Soon after the event on 6 August 1945, he was one of the few French editors to publicly express opposition and disgust to the United States' dropping the atomic bomb in Hiroshima. He resigned from Combat in 1947 when it became a commercial paper. After the war, Camus began frequenting the Cafe de Flore on the Boulevard Saint-Germain in Paris with Sartre and others. He also toured the United States to lecture about French thought. Although he leaned left, politically, his strong criticisms of Communist doctrine did not win him any friends in the Communist parties and eventually alienated Sartre. In 1949, his tuberculosis returned, whereupon he lived in seclusion for two years. In 1951, he published The Rebel, a philosophical analysis of rebellion and revolution which expressed his rejection of communism. Upsetting many of his colleagues and contemporaries in France, the book brought about the final split with Sartre. The dour reception depressed Camus; he began to translate plays. Camus's first significant contribution to philosophy was his idea of the absurd. He saw it as the result of our desire for clarity and meaning within a world and condition that offers neither, which he expressed in The Myth of Sisyphus and incorporated into many of his other works, such as The Stranger and The Plague. Despite his split from his "study partner", Sartre, Camus was still categorized as an Existentialist. He specifically rejected that label in his essay "Enigma" and elsewhere.

Question: "Camus joined which group and who did they combat?"

OPTIONS:
- no
- yes

Answer: "Germen Resistance cell Combat & against Nazis"

Response: no

Tommy and Suzy (brother and sister) went to the playground one afternoon with their mom and dad, Jan and Dean. They were playing a game of tag and having the best time ever running after each other and laughing. They liked to play tag instead of building sandcastles or swinging. They liked tag because they liked to run. They like to play hopscotch or jump rope but that day they wanted to play tag. Other games aren't as fun. They met Tony and Ally (who are best friends) and invited them to play tag too. Tony and Ally like to play other games like hopscotch or jump rope but that day they joined the game of tag. Making new friends is important. Tony and Ally would rather make friends than play their favorite games.

Question: "Why is playing tag better than building sandcastles?"

OPTIONS:
- no
- yes

Answer: "Playing tag involves running"

Response:
yes