Science 7 Test- Fossils and the Geologic Time Scale (Chapter 6)

I.Multiple Choice

Choose the best answer to the question/statement

1. A fossil made of hardened minerals in the shape of the original organism or one of its

parts is called

a. moldb. variation

c. amberd. cast

2. The technique that allows scientists to determine the actual age of a rock is called

a. absolute datingb. gradualism

c. natural selectiond. relative dating

3. The earliest forms of life appeared during

a. The Paleozoic Erab. The Cenozoic Era

c. The Precambrian timed. Mesozoic Era

5. On the Geologic Time Scale, eras are divided into

a. epochsb. indexes

c. periodsd. relative dates

6. In the Cambrian Explosion,

  1. The super-continent broke apart
  2. An asteroid collided with Earth
  3. A great number of different organisms evolved
  4. Mammals spread into every environment on Earth

7. The Mesozoic Era is often called the

a. Age of Mammalsb. Age of Reptiles

c. Age of Fishd. Age of Amphibians

8. A hollow area in sediment in the shape of all or part of an organism is called a

a. moldb. cast

c. trace fossild. carbon film

9. A break in the Earth’s Crust is called a(n)

a. intrusionb. unconformity

c. faultd. extrusion

10. The Paleozoic Era is often called the

a. Age of Mammalsb. Age of Reptiles

c. Age of Fishd. Age of Amphibians

11. The rock layers below an Extrusion are always

a. youngerb. older

c. the same age d. none of the above

12. The rock layers below an Intrusion are always

  1. youngerb. older
  1. the same aged. none of the above

13. Organism remains can be preserved in

a. tar, amber or iceb. tar, amber or rock

c. amber, ice or rockd. tar, ice or rock

14. According to the law of superposition, the oldest layer of rock is found

a. on the topb. in the middle

c. on the bottomd. when a fault cuts it

15. Dinosaurs ruled the Earth during what Era?

a. The Paleozoicb. The Mesozoic

c. The Jurassicd. The Cenozoic

16. The Cenozoic Era can be known as the

a. Age of Mammalsb. Age of Reptiles

c. Age of Fishd. Age of Amphibians

  1. Plants first started to grow on land during what Era?

a. The Paleozoic b. The Mesozoic

c. The Jurassicd. The Cenozoic

  1. Humans are currently living in what time period?

a. The Cenozoicb. The Tertiary

c. The Jurassicd. The Quaternary

  1. New Eras begin because of

a. a large number of changes in organisms

b. the number of years an Era can be

c. mass extinction of dominant organisms

d. the need for scientists to discuss time

  1. The ice age took place during the

a. Cretaceous Periodb. The Tertiary Period

c. The Jurassic Periodd. The Quaternary Period

  1. A fossil that is widely distributed and represent an organism that lived only briefly in called a(n)

a. index fossilb. trace fossil

c. petrified fossild. carbon film

  1. The age of a rock compared to the age of other rocks is called its

a. absolute ageb. relative age

c. absolute datingd. relative dating

  1. The number of years since a rock was formed is its

a. absolute ageb. relative age

c. absolute datingd. relative dating

  1. The first mammals appeared during

a. the Permian Periodb. the Triassic Period

c. the Jurassic Periodd. the Cretaceous Period

  1. “Lucy” lived during the

a. Jurassic Periodb. Cretaceous Period

c. Tertiary Periodd. Quaternary Period

II.True or False

Use A= True / B= False

26. Lucy was a fossil skeleton of an early ancestor of modern humans.

27. Pangea occurred during the Permian period.

  1. “Life exploded” in the Cenozoic Era.
  2. A dinosaur footprint in rock is an example of a trace fossil.
  3. A carbon film is a fossil in which minerals have been replaced by all or part of an organism.
  4. The first organisms were autotrophs.
  5. A fault is always older then the rock it cuts.
  6. The Precambrian time is split up into periods.

III.Using Science Skills

Use the diagram below to answer the questions

  1. The oldest rock layer is

a. Ab. B

c. Fd. G

  1. The youngest rock layer is

a. Ab. B

c. Fd. G

  1. All the fossils in layer B are
  2. shell, ammonite, fish, trilobite
  3. shell, ammonite, fish
  4. shell, ammonite
  5. shell
  6. The environment that existed during layer D was

a. landb. water

  1. The Era that occurred during layer F was

a. Paleozoicb. Mesozoic

c. Cenozoicd. Precambrian

  1. All the fossils in layer G are
  2. mammal
  3. mammal, plant
  4. mammal, plant, bird
  5. mammal, plant, bird, dinosaur
  6. The rock above layer C is

a. youngerb. older

c. the same aged. none of the above

  1. The environment that existed during layer B was

a. landb. water

  1. In which layer do mammals appear?

a. Bb. D

c. Fd. G

  1. How many intrusions are in the figure above?

a. 0b. 2

c. 1d. 4

IV.Concept Map

Match the correct location of each of the words below on the concept map.

  1. Mold
  2. Preserved fossils
  3. Amber

Fossils

include

#44. Rock

Fossils

#45.

Ice#46. Carbon Film

Tar

Casts Petrified

Fossils

V.“Mammals of the Jurassic Period”

Answer the following questions based on the article titled above.

47. Kelli was able to determine characteristics of an ancient animal because of

  1. where she found themb. the teeth and bones

c. microscopic evidence

48. Kelli was interested in

a. mammalsb. dinosaurs

c. birds

  1. Kelli’s main tool in the lab was a

a. screen boxb. microscope

c. rock hammer

50. Mammals are different from other kinds of animals because they

a. nurse their young with milkb. are larger in size

c. carry their young