T3 - 2.5 A coming and going of species

• Aardrijkskunde
• Middelbare school
• vwo
• Leerjaar 3

TRUE

FALSE

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

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

oldest-->

youngest-->

1

2

3

4

5

6

Reptiles

Land plants

fish

molluscs

mammals

crustaceans

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

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

Q.8ab: Which 2 statements are true? (use your workbook)

1. Layer 3 is youngest in hill A
2. Layer 1 is the youngest in hill A
3. Layer 4 is the oldest in hill B
4. Layer 6 is the oldest in hill B

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

How are you doing with geography so far?

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04:13

What do the caves the presenter visits have to do with the meteorite impact?

1. You can find deformed rock inside the caves
2. The caves were created by the meteorite
3. The caves are beautiful and so is the meteorite
4. The caves form half a circel, which shows the shape of the meteorite

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

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

How did the meteorite impact cause mammals to flourish?

Changing conditions

Consequences

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

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

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

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

Pangaea (during the Permian)

EARTH: the basics

Has finished.

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

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

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