Sept. 10, 2015 You need: (If you are not ready, I’m noting) Clean paper / Pencil HW: Egg in Bottle Lab report Warm Up: Yesterday we put an egg into a bottle without damaging the egg or the bottle. It related to the candle lab. How?

Egg in a bottle (and out)? Name: _____ Date Egg in a bottle (and out)? Question: How can I get a boiled egg (no shell) into a bottle without harm to the egg OR the bottle? Hypothesis: Write your hypothesis. Conclusions: 1) What worked (and why)? 2) Using the information learned by getting the egg INTO the bottle, how can we get it out? *SAFETY –

“Sucks” is not allowed

Egg in the bottle The egg nor the bottle could be harmed. 1. Light a piece of paper and put it into the bottle. 2. Place the egg over the mouth of the jar…hold it in place.

Egg in the bottle The egg nor the bottle could be harmed. 3. Notice a slight sputtering and the egg seems to want to jump OFF of the jar. Why?

Egg in the bottle The egg nor the bottle could be harmed. 4. As the fire seems to go out, the egg is now pushed firmly onto the mouth of the jar – and will slide (usually slowly) into the jar. Why?

Egg in the bottle What happened? 1. Originally, the air INSIDE the bottle is the SAME pressure as the air OUTSIDE the bottle. Air pressure SAME Air pressure

Egg in the bottle When we dropped in the fire, the air was heated…and expanded! High pressure Low pressure

Egg in the bottle Then the fire burned up all of the Oxygen and left not-so-much air in the container. Less air means less “stuff” inside and lower pressure. Low pressure High pressure

Egg out of the bottle How do we get the egg OUT of the bottle? Write down your answer – explain the science! Low pressure High pressure

How long will the candle burn? 21% Oxygen in all Jars – but that equals a smaller amount of oxygen in a small jar Largest Jar = ____ sec Medium Jar = ____ sec Small Jar = ____ sec

DENSITY PRESSURE and

Size Doesn’t Matter! Objects that are the same size could have very different masses! All materials are made of small particles called molecules…

DENSITY LOW density HIGH density DENSITY describes how closely packed the particles of an object are. HIGH density LOW density

Can you make a striped column? Rubbing alcohol Dish soap Vegetable Oil Water Draw what you think your column will look like.

Draw out your column – with colors! Label each liquid. Vegetable Oil Dish soap Water Dish soap Water Vegetable Oil Rubbing alcohol Rubbing alcohol Vegetable Oil Dish soap Water Rubbing alcohol What order is your column? Why?

It doesn’t crush you, though, because it is pushing on all sides. How does this relate to air? We know that air has mass and takes up space. Even though air molecules are spread far apart, the air in our atmosphere stretches up over 60 miles! The air above your head actually weighs about as much as a school bus! It doesn’t crush you, though, because it is pushing on all sides.

How does this relate to air? This pushing of air is called AIR PRESSURE. You felt PRESSURE when you were crammed into the tape square. . . . . . . . . . . . . . . . . . . . . . . . . . ………………………………………………………………………………………………………………………………………… Air at LOW DENSITY also has LOW PRESSURE Air at HIGH DENSITY also has HIGH PRESSURE

How does this relate to air? We know that air has mass… Air molecules are spread very far apart compared to molecules in a solid, like metal. Which means that air is also made of molecules.

TROPOSPHERE Thinnest Layer (0-12 km) Average Temperature of 25°C (Temperature drops as you go higher) All of Earth’s weather happens here. Air here contains water & dust. Most of the atmosphere’s air is here (this layer is very dense).

STRATOSPHERE 10-50 km above earth’s surface There is almost no water or dust in this layer. Contains the OZONE LAYER (which absorbs UV radiation from the sun) Very cold, until the top of the layer, where it warms to 0°C.

MESOSPHERE 50-80 km above Earth’s surface. Temperature plunges to -90°C (the coldest in the atmosphere) Meteors burn up here while entering the atmosphere.

THERMOSPHERE Thickest layer (80-400 km above Earth’s surface). Air is extremely thin. Atmospheric gases fade into outer space. Temperature can spike to 1,800°C. Ionosphere (lower portion) – contains ions or charged particles…allows radio waves to bounce off and auroras to occur. Exosphere (outer layer)

Layers of the atmosphere Cut out the layers of the atmosphere Color the pictures that will match each layer. Cut out the pictures to match to each layer. Paste them onto your notes.

Air Pressure at Different Altitudes Is air pressure greater at sea level or on top of a mountain? Lower Air Pressure Mountains (High altitude) Higher Air Pressure Sea Level (Low altitude)

Mt. Mitchell, NC Highest point east of the Mississippi 6684 ft. high

Mt. Everest, Highest point above sea level in the world 8850 meters high (29,035 ft)

Mt. Everest, Highest point above sea level in the world 8850 meters high (29,035 ft)

Exploring Air with Syringes Today, you will investigate air with syringes – working with a table partner. What happens to the air in the syringe when you push/pull on the plunger? What if the end is covered? *SAFETY – Be careful with the materials! Do not point either end of the syringe at another student.

Exploring Air with Syringes Name: _____ Sept. 9, 2014 Exploring Air with Syringes Question: What can we do to air in a syringe? What can the air do? Observations: Write 3 observations from your investigation. Conclusions: 1) What can air do? (that a solid or liquid can’t do…) 2) Write down 1 more question... *SAFETY – Be careful with the materials! Do not point either end of the syringe at another student.

Exploring Air with Syringes Based on the investigation, What can air do? A few words you need to know… COMPRESS – means to squeeze into a smaller space DENSITY – how closely molecules are packed together AIR PRESSURE – the force of air pushing on stuff COMPRESS

Air Pressure in a Syringe Which syringe has the air under more pressure? Low Pressure & Less Dense High Pressure & More Dense

Air Pressure in a Balloon Is the air pressure inside a balloon greater than or less than the surrounding air? Higher Pressure & More Dense Lower Pressure & Less Dense