Air & Indicators U1 2HVTTO

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 2

Air & Indicators

• Jacket in your locker
• Put your things on your desk

       Laptop/Book

       Notebook, pencil case

• Bag on the floor
  
• Read pages 

Lessongoals

• You can list the steps of scientific research
  
• You can explain what a discussion is and what its use is
  
• You can roughly tell what substances can be found in air and how these change when they are breathed in and out.
  
• You can explain what an indicator is.
  
• You know how to use the indicator limewater

Wheel of homework

Go to Lessonup.app and use this code

Reward

Penalty

Rewards

• +1 cm2 cheatsheet = you get to make a cheatsheet for a test. This starts being 1 by 1 cm. Everytime you earn this it gets 1 cm bigger to a max of 4 by 4 cm.
• 1/3 +0.5 = If you earn this 3 times you get to add 0,5 to one of your biology marks.
• Snitch = You can pick a classmate who also is checked for homework, you earn two V's (having 3 earns you a 1/3 +0,5)
• Too bad = You only get one V
  

penalties

• 45 min extra worktime = you need to come after school and do homework, this will last for 45 min or until the task is done
• Coloringpage = You get to pick a coloringpage, You need to color it and perform tasks that might be on it. You need to hand it in during the next lesson, If you don't you get 2 marks.
• 2/1 marks = a mark is an X, if you get 3 of these you will automaticly earn the 45 min extra worktime.
• Snitch = You can pick a classmate who also is checked for homework
• Lucky! = You don't get a penalty

This candle emits light, this is a

1. Fuel
2. Waste product
3. Energy
4. Oxygen

Composition of air

Put the gases in the right part of the pie chart

Oxygen

Nitrogen

Carbon dioxide

Other gases

Remember:

20% Oxygen (O₂)

80% Nitrogen (N₂)

<1% Carbon dioxide (CO₂)

'normal' air

• 21% O2
• 78% N2
• 0,04% CO2
• Outside temperature
• Low humidity

What happens to air when you inhale it?

 exhaled air 

• 16% O2
• 78% N2
• 5% CO2
• Higher temperature
• Higher humidity

Indicators

• Indicator = substance that indicates the presence of another substance
• Indicator changes its colour when the other substance is present
• Limewater is an indicator of carbon dioxide
• No CO2 = Limewater clear
• CO2 = Limewater cloudy/white

Bo has a big container, inside of it is an unknown gas.
Bo wants to discover what type of gas it is.
She uses a tube to let some gas escape into a glass of limewater.
After doing this for about a minute the limewater is clear.
What is her conclusion after this experiment?

1. the gas is carbon dioxide
2. the gas is not carbon dioxide
3. the gas is oxygen
4. the gas is not oxygen

Practical acitivities

• Read practical activities 3 page 68 and 5 page. 72
• Work together in pairs
• Fill out the diagrams and assignment that go with the activities
• Done?: Start working on B5 page 35

What you should do:

• Read pages  58 and 63
• Do asgmt  1-5 pg. 59 and practical activity 3 pg. 68 

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zs = Working in Silence

• No asking questions
• Silent, don't disturb anyone
  
• Stay at your  desk

What you should do:

• Read pages 58 and 63
  
• Do asgmt 1-5 pg. 59 and practical activity 3 pg. 68 

Done with the above?

• Work on the next chapter(s)
• Learn for the test 
• Make other homework
• Read a book

Zw = Working with whispering

• Teacher is available for questions
• Only whisper with the student next to you
• Stay at your  desk

End

Doelen:

• You can list the steps of scientific research
  
• You can explain what a discussion is and what its use is
  
• You can roughly tell what substances can be found in air and how these change when it is breathed in and out.
  
• You can explain what an indicator is.
  
• You know how to use the indicator limewater

Tidy Duty

Today these people are on tidy duty

• Desks: empty and straight
• Chairs:  underneath the desks
• Floor: no rubbish