1. The mass of an object is 6 grams. The volume of an object is 2 cm3. What is the object’s density?

1. Which is more dense, A or B?

2. Force pushing or pressing on an area in known as:

Lesson Essential Question:What are the effects of each property of air?

BA A B

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Go over bellringerVocabulary PreviewingDiscuss the 3 Properties of Air

– Mass– Density– Pressure

• A force pushing on an area or surface.

Pressure Activity

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1. Fill the cup half way with water.

2. Put on index card on top of the cup.

3. Hold the card tightly against the top of the cup with one hand. Quickly turn the cup upside down.

4. Let go of the card.

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Air PressureThe weight of a column of air pushing

down on you.

2,000-3,000 pounds!

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Why doesn’t the weight of air pressure crush you?

Because you have an equal amount of air pushing back in all directions.

http://www.phschool.com/atschool/phsciexp/active_art/measuring_air_pressure/index.html

Heavy Air Lab

• As you hold the potato, keep your fingers on the front and thumb on the back and not on the top and bottom. You don't want to stab yourself!

• Grab the straw with your writing hand and try to push the straw through the potato.

• Now, cap the top end of the straw with your thumb.

• Hold on firmly to both the straw and the potato and with a quick, sharp stab, drive the straw into the spud. You're so cool!

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When blowing up a balloon, where is the air pressure higher? INSIDE or OUTSIDE the balloon.

When letting go of an inflated balloon, in which way does the air travel? ____

A. Air travels from high pressure areas to low pressure areas. B. Air travels from low pressure areas to high pressure areas.

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What tool is used to measure air pressure?

• BAROMETER!!!!!• 2 types:

• Mercury• Aneroid

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Mercury Barometer: instrument that measures air pressure using liquid mercury.

Barometers

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Draw a line on the glass tube to show where the level of mercury would go if AIR PRESSURE FELL.

Draw a line on the glass tube to show where the level of mercury would go if AIR PRESSURE ROSE.

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Aneroid Barometer: instrument that measures air pressure without using a liquid.

Barometers

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Altitude The distance above sea level.

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Altitude Affects Air Pressure

–Imagine a stack of books, which book has more pressure on it, the top or bottom one?

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Altitude Affects Air Pressure

–Air at sea level is like the bottom book, it has high pressure.

– Air near the top of the atmosphere is like the top book, the air has less weight pressing on it and has a lower air pressure.

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Air pressure decreases as altitude increases.

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Altitude and Air Density: The density of air decreases as altitude increases.

Altitude Affects Density

Thursday, April 20, 2023

Complete the “Properties of

Air” homework.

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1. 3 minutes – with table partner

2. Using the word wall to help remind you of the vocabulary, draw a picture/doodle of one vocab word, and attempt to have your partner guess what you are doodling.

FAIR

PIZZA FLOOD

BLUE SCIENCE PUPPY

Aneroid Barometer

Density Altitude

Atmosphere Oxygen Air Pressure

Mercury Barometer

Mass Barometer

Weather Nitrogen Pressure