This lesson contains 12 slides, with text slides and 1 video.
Lesson duration is: 45 min
Items in this lesson
Welcome!
Today:
Discussing homework
Discussing history of life on earth (page 135)
Making exercises
Slide 1 - Slide
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 - Slide
Fossils
Slide 3 - Slide
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 - Slide
Origin fossils
Slide 5 - Slide
Slide 6 - Video
Geological timescale
Slide 7 - Slide
Mass extinctions
Slide 8 - Slide
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 - Slide
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 - Slide
Rudimentary organs
Slide 11 - Slide
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.
Lesson duration is: 45 min
