Geologic Time Scale

Which of the following is a record of Earth's history from its origin 4.6 billion years ago (bya) to the present?

• radioactive decay

• geologic time scale

• absolute-age dating

• relative-age dating

Tags

NGSS.MS-ESS1-4

Geologists organize Earth's history according to grouping called _____. Each eon contains ____, which, in turn contain _______. Each period in the geologic time scale contains _______. The current geologic epoch is called the Holocene epoch.

• period, eras, epoch, eons

• epoch, period, eras, eons

• eons, eras, period, epoch

• eras, eons, period, epoch

Tags

NGSS.MS-ESS1-4

Based from the diagram of geologic time scale, which is the largest among the time units?

• Eons

• Eras

• Period

• Epoch

Tags

NGSS.MS-ESS1-4

Based from the diagram, which is the smaller divisions of geologic time scale?

• Eons

• Eras

• Period

• Epoch

Tags

NGSS.MS-ESS1-4

All eons are made up of eras. Arrange the three eras of the Phanerozoic eon from youngest to oldest.

• 1. Paleozoic - "old life"

  2. Mesozoic - "middle life"

  3. Cenozoic - "recent life"

• 1. Mesozoic - "middle life"

  2. Cenozoic - "recent life"

  3. Paleozoic - "old life"

• 1. Mesozoic - "middle life"

  2. Paleozoic - "old life"

  3. Cenozoic - "recent life"

• 1. Cenozoic - "recent life"

  2. Mesozoic - "middle life"

  3. Paleozoic - "old life"

Tags

NGSS.MS-ESS1-4

The three earliest eons make up 90% of geologic time, known as Precambrian. Which of the following is the correct sequence of these eons from OLDEST TO YOUNGEST?

• Hadean, Proterozoic, Archean

• Archean, Proterozoic, Hadean

• Hadean, Archean, Proterozoic

• Proterozoic, Hadean, Archean

Tags

NGSS.MS-ESS1-4

What was/were important event(s) during Precambrian?

• I. Earth was formed.

• II. Earth became hospitable to life.

• III. All forms of life had soft bodies without shells or skeletons.

• I, II, III

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Why fossil dating from the most recent eon, the Phanerozoic, are the best preserved?

• I. They are younger than those from the Precambrian.

• II. Many of them represent organisms with hard parts such as bones, teeth, shells, and scales.

• Not I nor II

• Both I and II

Tags

NGSS.MS-LS4-1

Why fish is more likely to become fossilized than a snake?

• Fish is a cold-blooded animals.

• Fish is a member of the most diverse group of vertebrates, or animals with backbones.

• Fish has hard parts such as bones and teeth that are easily preserved than soft tissues.

• Fish can survive in water.

During the Phanerozoic eon, multicellular life diversified and abundant fossils. Phanerozoic means ___________________ in Greek.

• Recent life

• Middle life

• Old life

• Visible life