7.4 How did Life Develop?

7.4 How did Life Develop?
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Slide 1: Tekstslide
Biologie9th Grade

In deze les zitten 31 slides, met interactieve quizzen, tekstslides en 4 videos.

time-iconLesduur is: 45 min

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7.4 How did Life Develop?

Slide 1 - Tekstslide

A fossil is...
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0:20
A
A very old bone or other body part
B
A decayed old bone or other body part
C
A petrified (stone) shape of a bone or other body part
D
An imprint in rock of an ancient animal or plant

Slide 2 - Quizvraag

Which is not a fossil?
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0:20
A
Pollen grains inside an ancient clay pot
B
A pawprint of a dinosaur in petrified mud
C
A shell of a mollusc in a thick layer of calcium
D
A petrified human bone

Slide 3 - Quizvraag

An index fossil...
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0:20
A
is used as an indicator to see how old a layer is
B
is used as an indicator to see which layer has the most life forms
C
shows what a certain species looked like
D
Is the best-preserved fossil in a layer of rock

Slide 4 - Quizvraag

Explain why we do not
find fossils of bacteria.
timer
1:00

Slide 5 - Open vraag

Slide 6 - Tekstslide

Slide 7 - Tekstslide

Slide 8 - Tekstslide

7.4 How life began

Slide 9 - Tekstslide

3

Slide 10 - Video

01:19
How did the universe change, moments after the Big Bang?
A
It expanded and became hotter
B
It expanded and became cooler
C
It exploded and became hotter
D
It exploded and became cooler

Slide 11 - Quizvraag

02:03
Describe ancient Earth:
A
It had water and an atmosphere, but no oxygen
B
It had water and oxygen, but no atmosphere
C
It had water but no atmosphere, no oxygen
D
It had oxygen but no water and no atmosphere

Slide 12 - Quizvraag

03:02
Explain why the formation of the ozone layer was required for life to begin.
A
Ozone keeps the Earth at an optimal temperature
B
Ozone protects the Earth against harmful UV-radiation

Slide 13 - Quizvraag

Slide 14 - Tekstslide

Slide 15 - Video

Pangea: you are here

Slide 16 - Tekstslide

Pangea: the ancient continent

Slide 17 - Tekstslide

Slide 18 - Tekstslide

Cambrium Explosion
4 billion years: mostly bacteria, plankton and algae
From 600 million years ago: a burst of diversification of life

Slide 19 - Tekstslide

Workbook
Page 229
Question 31

Slide 20 - Tekstslide

Slide 21 - Video

Homework
Questions 32, 33, 34

Slide 22 - Tekstslide

Slide 23 - Tekstslide

Slide 24 - Tekstslide

Slide 25 - Tekstslide

Slide 26 - Tekstslide

Slide 27 - Tekstslide

Slide 28 - Tekstslide

Slide 29 - Tekstslide

Slide 30 - Video

Slide 31 - Tekstslide