Chapter 7 Test Review

During the Paleozoic Era,the first organisms to live partly on land and partly on water are the

• fossils

• amphibians

• insects

• vertebrae

Early Earth's atmosphere lacked which gas that is necessary for life as we know to exist today?

• helium

• hydrogen

• oxygen

• CO2

What are fossils?

• molds and casts of organisms that live today

• drawings of ancient animals and other oganisms

• footprints or burrows of small animals that live today

• the preserved remains or traces of organmiss that lived in the past

Which type of dating method can be used on rock layers by applying the Law of Superposition

• absolute dating

• onnline dating

• relative dating

• radiometric dating

Jawless fish were Earth's first ______________, or animals with backbones.

• invertabrae

• vertabrae

• mammals

• insects

a series of dinosaur footprints in rock are an example of a(n) ____ fossil

• carbon film

• cast

• trace

• petrified

What period of geologic time occurred most recently?

• Precambrian

• Quaternary

• mesozoic

A gap in the geologic record that occurs when sedimentary rocks cover an eroded surface is called a (n)_____

• intrusion

• fault

• uncomformity

• extrusion

Scientist believe that the Earth and the _______ are about the same age

• oceans

• moon

• jupiter

• space

According to the Geologic Time Scale, Earth is about _____ billion years old.

• 4.6

• 6.4

• 9.6

• 0.5