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Page 1: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

Where’s the Air?Where’s the Air?

Page 2: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

ObjectivesObjectives

• I can explain if air has mass.

• I can provide evidence to support my claim of if air has mass or not.

Page 3: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

Quick WriteQuick Write

•Where does weather happen?

–ATMOSPHERE

Page 4: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

AIRAIR• In our first investigation we

used a variety of weather tools to measure weather conditions. Air plays a very important role in the weather. In the next few days we are going to look more closely at air to learn some of its properties.

Page 5: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

SYRINGESYRINGE• This is a syringe. You can

use it to investigate air. You can work with your syringe alone or with other students, but you should not use the syringe to annoy another student!

Page 6: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

SYRINGESYRINGE• Things that annoy other

students:–Blowing the syringe in their face

–Taking someone elses syringe without asking

Page 7: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

MATERIALSMATERIALS• You have the following materials–Syringe–Tubing–Binder clip

Page 8: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

SYRINGESYRINGE• See if you can answer these questions:–What happens to the air in the syringe when you push and pull on the plunger?

–What can air do?

Page 9: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

33 33

Example: When you push the

plunger down, the air in the

syringe is pushed out the tube.

Example:

Does air have weight?

AIR INVESTIGATION

Observations Questions

Page 10: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

Air Observations Discussion Air Observations Discussion QuestionsQuestions

• When you clamp the tube closed and push the plunger down, what happens to the air?–The air is pushed into a smaller

space.• Is there more air, less air, or the

same amount of air in the syringe when the air is pushed into a smaller space?–Same amount

Page 11: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

Air Observations Discussion Air Observations Discussion QuestionsQuestions

• What happens when you let go of the plunger after pushing down?–The air pushes the plunger back

up.• What do you think happens to the

air when it is pushed into a smaller space?

• What happens to push the plunger back out when you release the pressure on the plunger?

Page 12: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

COMPRESSIONCOMPRESSION• When you push on the

plunger, the air is forced into a smaller space. We say the air is compressed. The same amount of air is still in the syringe when it is compressed.

Page 13: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

PRESSUREPRESSURE• Compressed air pushes back

with a force equal to the force compressing it. If the force on the plunger is released, the pressure in the compressed air will push the plunger out. The compressed air pushes back, and the push is called pressure!

Page 14: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

What to you think will happen if we put this blue cube into the syringe with the tubing clamped?

What do you think will happen to this pink packing bubble?

Page 16: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

AIRAIR• Everything is made out of atoms and molecules, including air. The molecules in gases are free to move around throughout the volume of gas. There is a lot of space between the molecules in gases.

Page 17: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

AIRAIR• When a volume of gas is compressed into a smaller space, the molecules are pushed closer together. The number of molecules is the same; they are just closer together.

Page 18: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

AIRAIR• Molecules compressed into a

smaller space bump into one another more often, and this creates pressure. Pressure pushes in all directions, and if the force keeping the gas compressed is reduced, the gas will expand into a larger space and the molecules will get farther apart.

Page 19: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not
Page 20: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

WORD BANK• Compression- When air is forced into

a smaller space.• Pressure- compressed molecules

pushing back with a force equal to the force that compressed it.

Page 21: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

QuestionsQuestions• Does air have weight (mass)?• Where does air pressure come

from?• How does air push the syringe

plunger out?• Why is air pressure so strong?

Page 22: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

33 33

Example: When you push the

plunger down, the air in the

syringe is pushed out the tube.

Example:

Does air have weight?

AIR INVESTIGATION

Observations Questions

Let’s review our questionsLet’s review our questions

Page 23: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

• Review from Friday-

• What happens to air when is it compressed?

• Objectives:

I will design an experiment to prove that air does, or does not, have

mass.

I will provide evidence to support my claim.

Page 24: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

QuestionsQuestions• Does air have weight (mass)?

Page 25: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

Does air have mass?Does air have mass?• Every object and substance in

the world is made of matter. Matter is the stuff that everything is made of. The amount of matter in an object is its mass. Mass is the measurement of the amount of matter in an object or a substance such as air. Mass is measured in grams.

Page 26: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

Does air have mass?Does air have mass?• One way to confirm that

something has mass is to weigh it. Weight is pull or force between Earth and the matter in an object or substance. Weight can vary slightly at different places on Earth and can vary greatly on different planets.

Page 27: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

Does air have mass?Does air have mass?• In outer space, away from

planets, objects become weightless, but their mass does not change.

• So let’s restate our question: –Does air have mass?–Is there any matter in a volume of air?

Page 28: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

• True or False: The syringe on the left has more air than the syringe on the right. Explain.

Page 29: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

EXPERIMENTEXPERIMENT• What experiment can we conduct

to find out if air has mass?

• Materials available:–Round balloons

–Clear straws

–String

–Paper clips

–Tape

Page 30: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

You Tube Video about mass/weight, grams/kilograms.

Page 31: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

Where’s the Air?Where’s the Air?

Page 32: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

Discussion CircleDiscussion Circle• Use the data you collected to

write a few claims (what you believe to be true) based on this experiment.

• DON’T FORGET TO BACK UP YOUR CLAIMS WITH EVIDENCE FROM THE EXPERIMENT!

Page 33: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

PURPOSE Does Air have mass?

RESEARCH

What do you know about air and mass already? _______________________________________________________ _______________________________________________________ ______________________________________________________

HYPOTHESI S

______________________________________________________ ______________________________________________________ _______________________________________________________

EXPERI MENT

Materials: Round Balloons, clear straws, string, paper clips, tape, _________________________________________ What is your plan, step-by-step? 1._____________________________________________________ 2._____________________________________________________ 3._____________________________________________________ 4._____________________________________________________ 5._____________________________________________________ 6._____________________________________________________

ANALYSI S

Write down your observations (what happened during the experiment):

CONCLUSI ON

What did you learn? _______________________________________________________ _______________________________________________________ _______________________________________________________ _______________________________________________________ _______________________________________________________

Page 34: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

SHARE RESULTSSHARE RESULTSWhat experiment did you perform?

What were your conclusions, what did you learn?

Page 35: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

EXAMPLE EXAMPLE EXPERIMENTEXPERIMENT

Page 36: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

ANALYZE RESULTSANALYZE RESULTS• Blowing up a balloon requires forcing air against a resistive force of rubber. The elasticity of the rubber puts pressure on the air in the balloon. The air in the balloon is compressed.

Page 37: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

ANALYZE RESULTSANALYZE RESULTS• Compression pushes the molecules closer together. There is more air in the volume defined by the balloon than there is in an equal volume of uncompressed air outside the balloon.

Page 38: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not
Page 39: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

ANALYZE RESULTSANALYZE RESULTS• Two balloons full of compressed air are balanced.

• When air is let out of one of the balloons, the air is no longer compressed.

Page 40: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

ANALYZE RESULTSANALYZE RESULTS• The balance tips down, and the balloon full of compressed air sinks because it has more mass than the deflated balloon with very little air.

• Air has mass, thus air is Air has mass, thus air is matter!matter!

Page 41: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

READING:READING:“What’s in the Air”“What’s in the Air”

page 6page 6

Page 42: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

What’s in the Air ****ANSWER ALL QUESTIONS IN COMPLETE SENTENCES. USE THE QUESTI ON TO ANSWER THE QUESTI ON. 1. What is the diff erence between permanent gases and variable gases in the atmosphere? __________________________________ __________________________________________________________________________________________________________________________________________ ______________________________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________ 2. During the daylight hours, plants and algae take in carbon dioxide and release oxygen. I f humans continue to destroy rain f orests, what might happen to the balance between these gases? _________________________________________________________________________________________________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________________________________________________________________________________________________________ 3. What was the most interesting thing you learned f rom this reading? ___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ 4. What was the author’s purpose in this selection? A) to entertain B) to persuade C) to inf orm

Page 43: Where’s the Air?. Objectives I can explain if air has mass. I can provide evidence to support my claim of if air has mass or not

WORD BANK

• Matter- the stuff everything is made of.

• Mass- the amount of matter in an object measured in grams.