Topics from April 2018
- When will a car engine stall?
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- What is fire?
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- What makes a Boomerang come back?
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- Why are convection heaters so-called?
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- Why do bats make high-pitched sounds?
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- When was the thermometer invented?
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- What does an X-Ray show?
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- How did science begin?
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- Why does iron go red when heated?
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- How does an electric Iron work?
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- Who sent the first radio message?
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- What is a glass made from?
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- Where will water boil at a low temperature?
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- When was the first gas balloon used?
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- Why does an automobile have a carburetor?
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- What is plastic?
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- How are mountains formed?
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- Why does an astronaut need a space suit?
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- Where was Morse code first used?
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- What are Gamma rays?
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- Why is pollution a problem?
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- When does an atom split?
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- How far can you see?
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- What is Radar?
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- Where is Ursa Minor?
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- What is a star?
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- When was the telephone invented?
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- Why don’t Cranes topple over?
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- What is the Milky Way?
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- How was the world formed?
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- When does frost form?
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- Why did the continents drift apart?
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- Where do earthquakes occur?
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- When was the sextant invented?
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