1-10 uv-, ir-, and other forms of radiation (lesson 1)

Uv, IR and other radiation (p. 44)
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Slide 1: Diapositive
NatuurkundeMiddelbare schoolhavoLeerjaar 2

Cette leçon contient 19 diapositives, avec quiz interactifs, diapositives de texte et 2 vidéos.

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Uv, IR and other radiation (p. 44)
Bluetooth 
- On
- VPN off

Stationary
- Books
- Pen and pencil
- iPad


Report
- NO


Lessonup
- Yes
Bags in
the cuboard
Phones in the phone holder

Slide 1 - Diapositive

Lessongoals:
  • Name and explain the different kinds of electromagnetic radiation.
  • Name and explain the different applications of electromagnetic radiation.  

Slide 2 - Diapositive

Activity 17 (p. 51)

Slide 3 - Diapositive

The electromagnetic spectrum
There is also solar radiation which you can not see, but you can detect it in other ways.

Slide 4 - Diapositive

Slide 5 - Diapositive

Uv radiation
  • Drinking water supply companies use UV radiation to kill bacteria in the water. 
  • Bees can see UV radiation.
  • A large portion of the UV 
        radiation is blocked by the 
       ozone layer, clouds and 
       dust particles

Slide 6 - Diapositive

Slide 7 - Vidéo

Which type of radiation is used by bees to better see the stammens of flowers?
A
IR
B
UV
C
Gamma
D
x-ray

Slide 8 - Quiz

Next to which colour do we find UV radiation?
A
Red
B
Violet
C
Radio
D
IR

Slide 9 - Quiz

Slide 10 - Diapositive

Which of the following is a use of UV radiation?
A
night vision weapons
B
Remote control of a television
C
Photo's to observe broken bones
D
Killing bacteria

Slide 11 - Quiz

Infrared radiation
Also called thermal radiation.
Examples: 
  • A coal fire, 
  • Sunlight, 
  • Remote controll of a TV, 
  • Rattlesnakes have grooves in their heads that are sensititve    to infrared radiation. They use it to spot prey at night.

Slide 12 - Diapositive

Slide 13 - Vidéo

What type of radiation does a rattlesnake use to spot it's prey at night?
A
UV
B
Gamma
C
IR
D
Micro

Slide 14 - Quiz

DANGER...
  • Not all radiation is harmful.
  • Only x-rays and gamma rays are dangerous. 
  • X-rays can move through the soft tissue in our bodies, but not through the bones. 
  • Gamma rays can move through just about everything, except through thick concrete and flat lead. 
  • Damaged cells can turn into cancerous cells. 

Slide 15 - Diapositive

Micro- and radio- waves
Mobile phones, mobile internet, bluetooth, radio and television are all examples of microwaves and radio waves. 
The body does not notice these forms of radiation. An exception is the microradiation from a microwave oven. This is so intense that it heats food. 

Slide 16 - Diapositive

Why is there more UV radiation high in the mountains?
A
It is closer to the sun
B
There is less atmosphere
C
There is a higher oxygen level
D
Mountains reflect UV radiation

Slide 17 - Quiz

Do the following questions:
51 t/m 55 (p. 46)
In your writingbook
Rules: 
- time 7 minutes
- No talking

Finished early: research the use of IR radiation as heating elements
timer
7:00

Slide 18 - Diapositive

In a nutshell:

Slide 19 - Diapositive