Fossils Plough-back

What are the four main fossil types?

• Original, replacement, petrified, and mummified

• Original, compression/carbon film, petrified, and amber

• Original, replacement, moulds, and casts

• Original, replacement, compression/carbon film, and indirect

Any animal that has a backbone and four limbs is called

• a theropod

• a tetrapod

• an archaeoptyryx

• a lobe-finned fish

Tags

NGSS.MS-LS4-2

Bird-like dinosaurs but with teeth and a long hard tail

• Theropods

• Tetrapods

• Ichthyostega

• Mammoths

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Environments that helps preserve animal remains

Answer explanation

Permafrost, amber, peat, dry air

Why peats help preserve fossils

• Peats block out sunlight

• Peats help soft tissue decompose faster

• Low oxygen and high acidity

• Peat is oxygen-rich

Which of the following is NOT a characteristic of index fossils?

• Widespread

• Existed within a narrow period of time

• Abundant

• Found in permafrost

A fossil preserved in peat can be an index fossil.

• Right

• Wrong

Answer explanation

Index fossils helps us compare the ages of different sedimentary strata so they must be in sedimentary rock to work.

A, B and C are three locations where some index fossils are found in sediments. If the butterfly-like fossil were to be found in Location B, where would it be?

• Beneath B4

• Between B3 and B4

• Above B1

• Between B1 and B2

Tags

NGSS.MS-ESS1-4

NGSS.MS-ESS2-3

NGSS.MS-LS4-1

Which location has the oldest top layer

• A

• B

• C

• The top layers in Locations A and B are of the same age

Tags

NGSS.MS-ESS1-4

Stromatolites are fossils of

• one of the earliest lifeforms

• one of the earliest vertebrates

• dinosaurs

• ancestors of birds

Tags

NGSS.MS-LS4-1