Evidence for Change on Earth

G3 T7 L3 Living things and Climate Change March 29

Objective: I can tell why fossils of plant seeds are too important.

Do Now

1- The Mojave desert was covered by (mud /sand/ sea) millions of years ago.

2- Now the Mojave desert is covered by (sand/water) because the weather is too hot.

3- which plant is living now in the Mojave desert ( Jasmine/ Lotus/cactus).

4- Define trace fossils.

Evidence of Climate Change

• Climate on Earth has pattern of warming and cooling.

• Scientists know that climate changes because they have fossil evidence.

• Some kinds of organisms can not survive when even a small climate change happens.

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Fossils of plant seeds

• Fossil of plant seeds give scientists good evidence for climate change

• Different kinds of plans survived in different climates .

Fossils of plants seeds

• Sientists can tell how the climate was like if they found a specific plant seed in a rock layer.

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G3 T7 L3 Living Things and Climate change

Objective:

Do Now

1- If scientists found a plant seed fossil, they can tell about how the weather looked like back in the day( True/False)

2- Which one is a trace fossil ( plant/animal/ egg nest)

3- The total number of fossils found, this best describes(ice fossils/trace fossils/ fossils record)

4- Define fossils

• Scientests argue that climate change can cause extinction

• Argue:

• To make claims supported by evidence.

Climate Change

• After big climate change, some organisms no longer appear in the fossil record.

• The organisms that couldn't live in the changed environment became extinct.

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Example ( Crocodile Fossil in Wyoming desert)

• This area used to be covered by a huge lake.(millions of years ago)

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Example (Mammoth)

• This is an evidence that this area was covered by ice millions of years ago)