WorksheetsGeologic Time Scale
Total questions: 15
Worksheet time: 11mins
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
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
Based from the diagram of geologic time scale, which is the largest among the time units?
Eons
Eras
Period
Epoch
Based from the diagram, which is the smaller divisions of geologic time scale?
Eons
Eras
Period
Epoch
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"
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
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
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
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
Which of the following eras is known for the emergence of dinosaurs?
Phanerozoic
Mesozoic
Cenozoic
Paleozoic
During Precambrian, Earth was formed. Which of the following describes when Earth first formed?
With crust
With continents
With atmosphere
Hot and volcanically active
Earth was extremely hot after it formed. What were the early Earth's heat sources?
I. Gravitational contraction
II. Radioactivity
III. Asteroid and meteorite bombardment
I, II, III
What is the process by which a planet becomes internally zoned when heavy materials sink towards its center and lighter materials accumulate near its surface?
Differentiation
Transgression
Regression
Correlation
As volcanic activity continued during Archean, microcontinents continues to formed. Why they were called it as microcontinents?
Because it was a small fragments of granite-rich crust.
Because they were not large enough to be considered continents.
Because it was less dense.
Because of the water in the mantle.
