Science Yr2 Lesson 11 Theory burner

Science Year 2 lesson 11
Burner
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Science Year 2 lesson 11
Burner

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Hoe gedraag je je tijdens de les?
  • Naar je plaats, spullen klaarleggen op je tafel 
      - Macbook
      - Science book
  • Niet praten zonder toestemming (alleen zachtjes met leerling direct naast je)
  • Niet van je plaats zonder toestemming


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Today
  • Quiz 1.1 - 1.3
  • Preparation for lab lesson Bunsen Burner

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The burner
  • Instruction on Google Classroom 
  • Read the instruction and discuss with your neighbour

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The burner
Air control: to change the color of the flame (more  =  more oxygen = better combustion)
Gas control: to change the height of the flame (more or less gas)

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The burner
Gas control: closed
Air control: closed
Gas control: open
Air control: closed
Gas control: open
Air control: open

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Connect the burner to the gas valve
  • The gas valve: yellow button on lab table
  • The gas hose is attached to the gas valve
OFF
ON

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Check gas control and air control
  • Gas control closed?
  • Air control closed?
  • Open the gas valve (yellow)

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1a. Light a burner
  • Hold the match between thumb and index finger
  • Drag the match head along the striker on the box
  • When the match burns: keep the head higher than the rest of the match.

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1b. Light the burner
  • Hold the burning match above the burner
  • Open the gas control at the same time

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2. Adjust the color of the flame
  • Make a silent blue flame by opening the air control a bit
  • Make a roaring blue flame by opening the air control

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3. Adjust the height of the flame
  • Make a yellow flame by closing the air control
  • Adjust the height of the flame with the gas control

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4a. Check temperature of the flame
  • Make a roaring blue flame by opening the aircontrol
  • Use the tongs and hold the gauze vertical in the flame

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4b. Check temperature of the flame
  • Use the tongs and hold the gauze horizontal in the flame

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5. Turn off the burner
  • Close the air control
  • Close the gas control 
  • Close the main gas valve (yellow)

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Homework for next time
Prepare for Burner lab lesson:
  • Read the instruction on ClassRoom: "How does the bunsen burner work?"
  • Make the assingment Bunsen burner on Classroom
  • Study the LessonUp


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