Science Yr2 Lesson 11 Theory burner

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

Science Year 2 lesson 11

Burner

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

Today

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

The burner

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

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)

The burner

Gas control: closed

Air control: closed

Gas control: open

Air control: closed

Gas control: open

Air control: open

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

Check gas control and air control

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

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.

1b. Light the burner

• Hold the burning match above the burner
• Open the gas control at the same time

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

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

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

4b. Check temperature of the flame

• Use the tongs and hold the gauze horizontal in the flame
  

5. Turn off the burner

• Close the air control
  
• Close the gas control 
• Close the main gas valve (yellow)

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