T3 - 2.5 A coming and going of species

Exercises unit 2.4
unit 2.4
Q. 2, 3, 4, 5, 7, 8

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Slide 1: Slide
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This lesson contains 42 slides, with interactive quizzes, text slides and 3 videos.

Items in this lesson

Exercises unit 2.4
unit 2.4
Q. 2, 3, 4, 5, 7, 8

Slide 1 - Slide

Question 3
a. What happened to the rock layers since they were formed on the bottom of the sea?
b. Now it is a quarry, a very long time ago there was a...
c. Which layer is the oldest?
d. How did they discover that life on earth was not always the same?

Slide 2 - Slide

Question 4
Which statements are right, which are wrong?

Slide 3 - Slide

Slide 4 - Slide

In the beginning, there were only plants and no animals
Dinosaurs lived during the precambrian
Land animals existed before land plants
The time of the dinosaurs and ammonites lasted for about 190 million years
We are living in the tertiary
The precambiran lasted longer than all other time periods combined

Slide 5 - Drag question

Question 5
About the evolution of life!

Slide 6 - Slide

Put the yellow boxes with forms of life in the right order of appearance on earth
Land plants

Slide 7 - Drag question

Question 7

Slide 8 - Slide

Relative age

The age of a rock layer in comparison to the surrounding layers

Example: There are only trilobites in the lowest layer, so this must be the oldest
Absolute age

Based on chemical analysis, scientiest determine the 'exact' age of a rock or fossil

Example: This rock layer is 420 million years old

Slide 9 - Slide

Relative age
Absolute age
The age of a fossil in millions of years
The fossil is as old as the layer in which it is found
The fossil and the layer in which it is found are older than the layers that lie on top
The age is determined with the help of the rock's radioactivity

Slide 10 - Drag question

Q.8ab: Which 2 statements are true? (use your workbook)
Layer 3 is youngest in hill A
Layer 1 is the youngest in hill A
Layer 4 is the oldest in hill B
Layer 6 is the oldest in hill B

Slide 11 - Quiz

Could layer 3 have been from the Ordovician, Jurassic or Tertiary?

Slide 12 - Slide

Slide 13 - Slide


Slide 14 - Video

Slide 15 - Slide

How are you doing with geography so far?

Slide 16 - Poll

Also answer Q. 6

Slide 17 - Slide

Question 2
a: what are the direct results of the impact?
b: Many animals died of indirect consequences. The eclipse resulted in a .................... . Because animals and plants died

Slide 18 - Slide

What do the caves the presenter visits have to do with the meteorite impact?
You can find deformed rock inside the caves
The caves were created by the meteorite
The caves are beautiful and so is the meteorite
The caves form half a circel, which shows the shape of the meteorite

Slide 19 - Quiz

Direct consequences
Indirect consequences
debris flying around
solar eclipse
plants die due to lack of sunlight
Forest fires across the world
Big fat crater in Mexico
Meteorite turning to dust
Acid rain
Temperatures around crater rose to 1000 degrees
Food shortage
World temperature decreased

Slide 20 - Drag question

Slide 21 - Slide

Q. 3a: Give two reasons why the thin layer of clay with iridium is so important as evidence of the meteorite impact

Slide 22 - Open question

Slide 23 - Slide

How did the meteorite impact cause mammals to flourish?

Slide 24 - Open question

Slide 25 - Slide

Slide 26 - Slide

Changing conditions
Q. 6a
Sufficient oxygen
Extinction of dinosaurs
Hunted by humans
Ozone layer that protects against UV
Meteorite impact
The rising cilimate temperature and changing landscape
The development of land plants
Extinction mammoth
Extinction dinosaurs
The strong rise of mammals
The development of land animals
Extinction of the tiger

Slide 27 - Drag question

What influences what? Put in the right order with correct explanation
Explanation 1>2
Explanation 2>3
Temperature on earth
Sea level
Volcanic activity
Due to CO2 increase temp. rises
Because it is hotter, ice melts and sea level rises

Slide 28 - Drag question

Slide 29 - Video

Also answer Q. 6

Slide 30 - Slide

Geography lesson
- review homework
- Geography in the upper form
- Video on coal formation

Slide 31 - Slide

Q. 2: How does this dead fish becoming a fossil until it is found?

Slide 32 - Slide

The soft parts perish
The fish remains are buried by layers of sediment
The sedimentary layers turn into rock
The rock is moved up to the surface
The fossil is removed from the rock with a hammer and chisel

Slide 33 - Drag question

Review question 6
unit 2.5

Slide 34 - Slide

Question 7b
--> The higher the latitude, the lower the temperature
--> The bigger the continent, the dryer the centre of the continen

Slide 35 - Slide

Pangaea (during the Permian)

Slide 36 - Slide

Slide 37 - Slide

EARTH: the basics
Has finished.

Up next: How did COAL, OIL and GAS form on earth?

Slide 38 - Slide

Slide 39 - Video

Slide 40 - Slide

Q. 6: 100 million years ago, the earth was much hotter than it is now. Why was the sea level then that much higher than now? give 2 reasons

Slide 41 - Open question

2.3: Q.7 The remains of Mammoths have been found on the bottom of the North Sea. Explain how this is possible

Slide 42 - Open question