Cette leçon contient 12 diapositives, avec diapositives de texte et 1 vidéo.
La durée de la leçon est: 45 min
Éléments de cette leçon
Welcome!
Today:
Discussing homework
Discussing history of life on earth (page 135)
Making exercises
Slide 1 - Diapositive
What are we going to learn today?
Today we'll be learning:
How fossils originate.
What the history of life on earth is.
How animals are related when they have a common ancestor.
Slide 2 - Diapositive
Fossils
Slide 3 - Diapositive
Fossils
Fossils are petrified remains of an organism, pressed in a sediment. Fossils are extremely important for researching the history of life on earth.
Slide 4 - Diapositive
Origin fossils
Slide 5 - Diapositive
Slide 6 - Vidéo
Geological timescale
Slide 7 - Diapositive
Mass extinctions
Slide 8 - Diapositive
History of animals
Almost all species that are alive now weren't so millions of years ago. However, there where ancestors where those species originate from. A lot of species share a common ancestor that was alive back then.
Slide 9 - Diapositive
Kinship
Proof for this is that a lot of animals are build up the same. They ahve the same organs and structure. We even share some organs that one animals doesn't need anymore. These organs are called rudimentary organs.
Slide 10 - Diapositive
Rudimentary organs
Slide 11 - Diapositive
Time to work!
The homework for next lesson are the exercises of paragraph 2.5, starting on page 139. You also need to make the summary and plusexercise. You can start with them now.
La durée de la leçon est: 45 min
