Cette leçon contient 23 diapositives, avec diapositives de texte.
La durée de la leçon est: 50 min
Éléments de cette leçon
Knowing more about radiation
(p. 49)
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
Lesson goals:
Explain how we know of which materials stars are made.
Explain why it is important
to observe the universe with satelites instead of telescopes for example.
Slide 2 - Diapositive
HUBBLE TELESCOPE
Slide 3 - Diapositive
Slide 4 - Diapositive
Dark matter
Not visible except through gravity.
New map where we find these in the universe
Slide 5 - Diapositive
Slide 6 - Diapositive
Two new moons of pluto were discovered.
Slide 7 - Diapositive
Slide 8 - Diapositive
Protoplanetary discs
- Possibility of life outside of earth is more probable than we think.
Slide 9 - Diapositive
Slide 10 - Diapositive
Gamma rays
Huge explotions, where more enery is released than what our sun emits in 10 billion years AND
it happens with elements of a low mass, like hydrogen and helium.
Slide 11 - Diapositive
Slide 12 - Diapositive
Comet shoemaker
Collided with the planet Jupiter in 1994
Slide 13 - Diapositive
Slide 14 - Diapositive
Dark matter
The universe keeps on expanding, and 74% is dark energy...
The term can not yet be fully explained
Slide 15 - Diapositive
Slide 16 - Diapositive
Alien worlds ??
Slide 17 - Diapositive
Looking at the stars
How did astronomers gather all the information they have about the universe if stars are simply white sparkles in the night sky?
They make observations in
all areas of the electro-
magnetic spectrum
Slide 18 - Diapositive
Determining materials
If certain colours are omitted in the spectrum of a star, you can determine of which materials the star is made. For example the spectrum of the sun is...
Slide 19 - Diapositive
Extraterrestrial forms of life?
An important condition for this would be the presence of water.
This can be recognised because certain
colours are missing from the IR radiation.
From earth this can not be observed
(too much water vapour in the air).
That is why satallites investigate the infrared spectrum.
Slide 20 - Diapositive
Radiotelescopes
Receives radio waves and
microwaves from the universe.
X-rays can also not penetrate the water vapour in the air and therefore is also investigated by satellites.
X-rays
Slide 21 - Diapositive
Do the following questions:
61 to 64 (p. 50)
In your writingbook
Rules:
- 6 minutes
- No talking
Finished early: look for more important discoveries of the HUBBLE telescope on the internet.
timer
6:00
Slide 22 - Diapositive
In a nutshell:
Black lines in the spectrum reveal the presence of certain substances.
The vapour in the air blocks much
radiation, and therefore satellites are useful in observing the universe
La durée de la leçon est: 50 min
