Airpressure presentation4
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msksThe document describes three experiments that demonstrate how air occupies space and exerts pressure. The first experiment shows that a piece of paper placed in a test tube lowered into water remains dry because the air in the tube displaces the water. The second experiment involves boiling water in empty cans, which causes the air inside to be driven out, so when the cans are placed in cold water they collapse due to atmospheric pressure. The third experiment uses a candle to reduce the air pressure inside a bottle, allowing an egg that normally would not fit through the mouth to be pushed in by the higher outside pressure.
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The document summarizes several key properties of air through descriptions of experiments:
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The document discusses convection in liquids and gases through several experiments and examples:
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This document summarizes 5 experiments that can be performed using common household items to demonstrate properties of air:
1. Pouring a "glass of air" by transferring air bubbles from one glass to another submerged in water, making air visible.
2. Inverting a full glass of water without spilling by taking advantage of greater air pressure outside pressing the water in.
3. Crushing an empty oil can by boiling water inside to remove air, then cooling and screwing the cap on, allowing greater outside air pressure to crush the can.
4. Demonstrating air's weight by trying unsuccessfully to lift a board covered with newspaper, as the air pressure holds it down.
5
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4. Seeing colored ink pigments separate and spread differently through tissue paper spotted with water.
5. Making a cup rise by blowing between the rims of two cups placed one inside the other.
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Air is a mixture of gases that has weight, takes up space, and can be compressed. It exerts pressure in all directions that increases with temperature as the gas particles move faster, and decreases with altitude as there is less air above pressing down. Experiments like the upside-down cup, balloon, and Cartesian diver demonstrate these key properties of air.
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Air pressure can crush an empty soda can. The experiment involves heating a can with a small amount of water inside until steam builds up, then quickly inverting it into cool water, causing the steam to condense and reduce air pressure inside the can. This lower internal pressure causes the outside air pressure to crush the can with a dull pop.
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The document provides instructions for 5 stations that simulate different weather phenomena as part of a classroom activity. Station 1 explores where water droplets come from on the outside of a glass. Station 2 demonstrates how to create a cloud and identifies the third necessary factor. Station 3 investigates how air pressure affects temperature and cloud formation. Station 4 shows how to inflate a balloon without blowing into it. Station 5 simulates precipitation using a pan of water, ice cubes, and a cookie sheet to form "rain". Students are instructed to observe, record data, form hypotheses, and answer analysis questions at each station.
Book of science experiments
This document summarizes 5 experiments that can be performed using common household items to demonstrate properties of air:
1. Pouring a "glass of air" by transferring air bubbles from one glass to another submerged in water, making air visible.
2. Inverting a full glass of water without spilling by taking advantage of greater air pressure outside pressing the water in.
3. Crushing an empty oil can by boiling water inside to remove air, then cooling and screwing the cap on, allowing greater outside air pressure to crush the can.
4. Demonstrating air's weight by trying unsuccessfully to lift a board covered with newspaper, as the air pressure holds it down.
5
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The webinar may also give some examples on how nonprofits can best leverage Walmart Business+.
The event will cover the following::
Walmart Business + (https://business.walmart.com/plus) is a new shopping experience for nonprofits, schools, and local business customers that connects an exclusive online shopping experience to stores. Benefits include free delivery and shipping, a 'Spend Analytics” feature, special discounts, deals and tax-exempt shopping.
Special TechSoup offer for a free 180 days membership, and up to $150 in discounts on eligible orders.
Spark Good (walmart.com/sparkgood) is a charitable platform that enables nonprofits to receive donations directly from customers and associates.
Answers about how you can do more with Walmart!"
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Qualitative research interview training by Professor Katrina Pritchard and Dr Helen Williams
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Airpressure presentation4
- 1. Air Pressure Air Occupies Space Air Exerts Pressure
- 2. Experiment #1 Air Occupies Space
- 3. Fill a beaker/bowl three quarters full with water.
- 4. Place a piece of paper halfway down a test tube/glass.
- 5. Push the glass, mouth first, into the water and ……
- 7. Remove the paper. Is it wet?
- 8. Why? Paper is not wet because air in the glass is taking up the space. Try pushing down on the handle of a bicycle pump while closing the nozzle of the pump with your thumb. Notice what happens ….. Discuss your experience with your classmates.
- 9. Experiment # 2 The Collapsing Can
- 10. Add a small amount of water in empty cans and let it boil until all of it evaporates.
- 11. Remove the cans from the Bunsen burner/stove and immerse the cans in a bowl of cold water or place them under cold flowing water from the tap. Notice what happens……
- 13. What happened? When the water boils in the cans, it changes into steam. Steam drives all the air inside, out of the cans. As the can immerses into the cold water water, the steam immediately condenses into water. As the air is removed from inside the can, the weight of the air/atmospheric pressure crushes the container.
- 14. Experiment # 3 Hard Boiled Egg
- 15. Hard boiled egg doesn’t go through the narrow mouth of a conical flask/ bottle.
- 16. Light a candle inside the bottle and……
- 17. Put the hard boiled egg on its mouth. Immediately.
- 18. Egg goes inside the bottle
- 19. What happened? When the candle burns, oxygen is used up. This reduces the amount of air in the bottle, which decreases the air pressure inside the flask. The higher pressure outside the flask then pushes the egg in.
- 20. Produced by Khaula Shehzad Audio by Shorthopper