WorksheetsGeologic Time Scale Review
Total questions: 21
Worksheet time: 7mins
In which time period are we currently living?
Precambrian Time
Paleozoic Era
Mesozoic Era
Cenozoic Era
Jellyfish are one of the oldest species on Earth. In what time period did they first appear?
Precambrian
Paleozoic
Mesozoic
Cenozoic
In what time period did Pangaea, the super continent, appear?
Precambrian
Paleozoic
Mesozoic
Cenozoic
Dinosaurs, small mammals, and birds are found in this time period.
Precambrian
Paleozoic
Mesozoic
Cenozoic
What are fossils that are abundant, easily recognizable, short lived, and widespread called?
Preserved fossils
Index fossils
Imprints
Radioactive dating
Preserved remains of plants and animals from the remote past are called?
Sedimentary rocks
Radioactive dating
Decayed organisms
Fossils
The Law of Superposition states
Younger rocks layers are on top of older rock layers
Fossils are found in sedimentary rocks
Older rock layers are on top of younger rock layers
Absolute age dating
Which era was the longest, taking up 88% of geologic time?
Precambrian
Paleozoic
Mesozoic
Cenozoic
What does absolute age tell us about a rock layer or fossil?
The 'exact' age of a fossil determined by radiometric dating
The relative age of a fossil determined by radiometric dating
Younger rock layers sit on top of older rock layers
Older rock layers sit on top of younger rock layers
Which fossil would make the best index fossil?
Beetle
Flower
Frog
Fish
What two methods are used for determining the age of rocks and fossils?
Relative and Absolute Dating
Carbon and Water Dating
Sedimentary and Igneous Rocks
Spatial and Layered Dating
Use relative age dating to put the rock layers in correct order from oldest to youngest.
B, D, A, E, C
C, E, D, A, B
A, C, E, D, B
C, E, D, B, A
Marine plants and invertebrates were abundant during which era?
Precambrian
Paleozoic
Mesozoic
Cenozoic
Which is the youngest rock layer?
Siltstone
Conglomerate
Mudstone
Limestone
Which rock layer is oldest from Site 1?
G
B
A
E
Which of the fossils is the oldest?
Dinosaur
Bird
Shell
Ammonite
What does relative age tell us about a rock layer or fossil?
The age of one rock layer or fossil compared to another.
The relative age of a fossil determined by radiometric dating
Younger rock layers sit on top of older rock layers
Older rock layers sit on top of younger rock layers
