Pressure Basics
What is pressure?
Answer: The force applied to a surface or object.
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What causes air pressure?
Answer: The weight of air around us pushing on everything.
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What happens to fluid pressure as you dive deeper into water?
Answer: It increases because the weight of the water above you presses down more.
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How does altitude affect air pressure?
Answer: As altitude increases, air pressure decreases.
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What does density mean?
Answer: The amount of mass in a given volume of a substance.
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What happens to air pressure when a soda can is opened?
Answer: It drops suddenly, causing the fizzing sound.
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What are two main differences between air pressure and fluid pressure?
Answer: Air pressure changes with altitude and weather; fluid pressure changes with depth and density.
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Why do deep-sea submarines need strong hulls?
Answer: To withstand the enormous fluid pressure at great depths.
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Why can we feel pressure even though we can’t see it?
Answer: Because moving particles constantly collide with surfaces and objects, creating force.
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Why is it harder to breathe at high altitudes?
Answer: Air pressure is lower because there is less air above you.
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Name two factors that affect fluid pressure.
Answer: Depth and density.
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How does depth affect fluid pressure?
Answer: The deeper you go, the more pressure there is.
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Which liquid creates more pressure—water or honey? Why?
Answer: Honey, because it is denser than water.
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At the bottom of the Mariana Trench, how does pressure compare to sea level?
Answer: It’s over 1,000 times greater!
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Which type of pressure affects weather—air or fluid? Explain.
Answer: Air pressure; changes in air pressure help predict weather patterns.
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How is air pressure useful for scientists on Earth?
Answer: It helps predict weather and understand atmospheric changes.
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