What happened in Mexico during the Mesozoic era?

• An asteroid crashed.

• A volcano erupted.

• A glacier crashed.

What is a mass extinction?

• It’s when many species became extinct at the same time.

• Help to identify a very short period of Earth’s history.

• It’s an energy-rich resource formed from the buried remains of once -living organisms.

• The preserved remains or traces of a living thing .

What is a fossil fuel?

• It’s when many species became extinct at the same time.

• Help to identify a very short period of Earth’s history.

• It’s an energy-rich resource formed from the buried remains of once -living organisms.

• The preserved remains or traces of a living thing .

What is a fossil ?

• It’s when many species became extinct at the same time.

• Help to identify a very short period of Earth’s history.

• It’s an energy-rich resource formed from the buried remains of once -living organisms.

• The preserved remains or traces of a living thing .

Mention the three steps of fossil formation.

• 1) Plants die and settle at the bottom of a body of water.. They are buried by sediment. 2) The temperature and the pressure rise. Peat doesn’t give off a lot of heat. 3) Peat continues to be compressed and heated.

• 1) Many tiny sea organisms die and settle to the bottom of the ocean where they are buried by sediment. 2) Over time , the weight of both the sediment and the water above it cause the temperature and pressure to rise. 3) Eventually, all that’s left of the organism is hydrogen and carbon.

• 1) An animal dies and settles on the bottom of a body water. 2) Sediment buries the animal. 3) Hard parts are preserved.

Mention three examples of fossils fuels.

• Sunlight, water and soil.

• Coal, oil and natural gas.

• Water , coal and natural gas.

What is a paleontologist?

• Scientists who studies plants.

• Scientists who study land.

• Scientists who study fossils.

How can we learn more about an area’s history?

• By studying its rocks and fossils.

• By studying its animals and plants.

• By studying the people that live there.

It’s the age of that layer when you compare it to other layers (older, younger, or the same) .

• The rock age.

• The relative age.

• The sedimentary age.

It’s made of all the fossils in Earth rock layers. it contains information about Earth’s history and the history of life on Earth.

• Geologic time scale

• Index fossils

• Fossil record