What Is Pressure?
What two factors determine how much pressure is applied?
Answer: Force and Area.
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What happens when you step on a balloon?
Answer: The small area increases pressure until it pops!
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What causes air pressure?
Answer: The weight and motion of air molecules pressing on everything.
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How does air pressure help predict the weather?
Answer: High pressure = clear skies; low pressure = storms.
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What is a fluid?
Answer: A liquid or gas that flows easily, like water or air.
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What do both air and fluid pressure have in common?
Answer: Both are caused by particles pushing on surfaces.
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What simple tool uses fluid pressure to lift heavy cars?
Answer: A hydraulic lift.
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Why are diamonds so hard?
Answer: They’re formed under extremely high pressure inside Earth.
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What happens to pressure if you apply the same force on a smaller area?
Answer: The pressure increases.
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Why do snowshoes prevent you from sinking into snow?
Answer: They spread weight over a large area, lowering pressure.
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Where is air pressure the strongest—sea level or mountaintop?
Answer: Sea level.
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Why do climbers need oxygen tanks on Mount Everest?
Answer: Air pressure is too low to breathe enough oxygen.
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What happens to pressure as you dive deeper underwater?
Answer: It increases with depth.
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What two factors affect air and fluid pressure differently?
Answer: Air pressure changes with altitude; fluid pressure changes with depth.
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What instrument measures air pressure?
Answer: A barometer.
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What keeps soda fizzy inside a can?
Answer: High internal pressure keeps the gas dissolved.
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Write the formula used to calculate pressure.
Answer: Pressure = Force ÷ Area.
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Why do car tires need the right air pressure?
Answer: Too high = burst; too low = wear and unsafe driving.
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What happens to air pressure as altitude increases?
Answer: It decreases.
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Why does a balloon expand when inflated?
Answer: Air molecules push outward, increasing internal air pressure.
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Why do water towers help supply water to high buildings?
Answer: Gravity creates fluid pressure to push water through pipes.
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Why is air pressure lower on mountains but fluid pressure higher in deep water?
Answer: Less air above at altitude; more water above increases pressure underwater.
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How do weather balloons use pressure in science?
Answer: They rise and measure air pressure to predict weather.
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What makes snow compact and icy when stepped on?
Answer: Pressure from your feet compresses it.
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Why does a thumbtack easily go into a wall, but your finger does not?
Answer: The thumbtack’s point has a small area, creating higher pressure.
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How is pressure related to weather?
Answer: Low pressure brings clouds/rain; high pressure brings clear skies.
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Why do your ears “pop” when you go up in an airplane?
Answer: The air pressure changes quickly and your ears adjust.
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What does “altitude” mean in relation to air pressure?
Answer: Height above sea level—the higher you go, the lower the pressure.
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Why do deep-sea divers wear special suits?
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Answer: To protect against extreme fluid pressure at great depths.
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hat role does density play in fluid pressure?
Answer: Denser liquids (like honey) create higher pressure.
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Why do soda cans hiss when opened?
Answer: Pressure inside the can is higher; releasing it causes gas to escape.
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How does fluid pressure help you drink with a straw?
Answer: Air pressure pushes the liquid up the straw into your mouth.
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If 20 N of force is applied on an area of 4 m², what is the pressure?
Answer: 5 Pa (20 ÷ 4).
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Explain how a pressure cooker works faster.
Answer: High pressure raises boiling point, cooking food faster.
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What is the lowest air pressure ever recorded usually caused by?
Answer: A hurricane.
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Explain how a barometer helps forecast weather.
Answer: It measures air pressure; drops indicate storms, rises indicate fair weather.
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Why can’t liquids be easily compressed like gases?
Answer: Liquids are not compressible—their particles are tightly packed.
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Which experiences more pressure: 10 m under water or 10 m in air?
Answer: 10 m underwater—liquid is denser.
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Why must deep-sea submarines be built strong?
Answer: To withstand extreme fluid pressure at ocean depths.
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What causes your body to feel “heavy” underwater?
Answer: The surrounding fluid pressure pushes on you from all sides.
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